Amazon Linux AMI update for ruby20, ruby21, ruby24

Published: 2019-08-13

Risk	Medium
Patch available	YES
Number of vulnerabilities	6
CVE-ID	CVE-2019-8324 CVE-2019-8325 CVE-2019-8322 CVE-2019-8323 CVE-2019-8320 CVE-2019-8321
CWE-ID	CWE-94 CWE-79 CWE-22
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Amazon Linux AMI Operating systems & Components / Operating system
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains information about 6 vulnerabilities.

1) Code Injection

EUVDB-ID: #VU20189

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-8324

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation when processing multiple line entries within gems in ensure_loadable_spec(). A remote attacker can send a specially crafted gem, inject malicious code into stub line of gemspec and execute it code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected packages:

i686:
    ruby20-libs-2.0.0.648-1.32.amzn1.i686
    ruby20-debuginfo-2.0.0.648-1.32.amzn1.i686
    rubygem20-bigdecimal-1.2.0-1.32.amzn1.i686
    ruby20-devel-2.0.0.648-1.32.amzn1.i686
    rubygem20-psych-2.0.0-1.32.amzn1.i686
    rubygem20-io-console-0.4.2-1.32.amzn1.i686
    ruby20-2.0.0.648-1.32.amzn1.i686
    ruby21-2.1.9-1.22.amzn1.i686
    rubygem21-bigdecimal-1.2.4-1.22.amzn1.i686
    ruby21-debuginfo-2.1.9-1.22.amzn1.i686
    rubygem21-io-console-0.4.3-1.22.amzn1.i686
    ruby21-devel-2.1.9-1.22.amzn1.i686
    rubygem21-psych-2.0.5-1.22.amzn1.i686
    ruby21-libs-2.1.9-1.22.amzn1.i686
    ruby24-2.4.5-1.30.11.amzn1.i686
    rubygem24-json-2.0.4-1.30.11.amzn1.i686
    rubygem24-bigdecimal-1.3.2-1.30.11.amzn1.i686
    ruby24-debuginfo-2.4.5-1.30.11.amzn1.i686
    rubygem24-io-console-0.4.6-1.30.11.amzn1.i686
    rubygem24-psych-2.2.2-1.30.11.amzn1.i686
    ruby24-libs-2.4.5-1.30.11.amzn1.i686
    rubygem24-xmlrpc-0.2.1-1.30.11.amzn1.i686
    ruby24-devel-2.4.5-1.30.11.amzn1.i686

noarch:
    ruby20-irb-2.0.0.648-1.32.amzn1.noarch
    ruby20-doc-2.0.0.648-1.32.amzn1.noarch
    rubygems20-devel-2.0.14.1-1.32.amzn1.noarch
    rubygems20-2.0.14.1-1.32.amzn1.noarch
    ruby21-irb-2.1.9-1.22.amzn1.noarch
    rubygems21-devel-2.2.5-1.22.amzn1.noarch
    ruby21-doc-2.1.9-1.22.amzn1.noarch
    rubygems21-2.2.5-1.22.amzn1.noarch
    rubygems24-2.6.14.3-1.30.11.amzn1.noarch
    rubygem24-did_you_mean-1.1.0-1.30.11.amzn1.noarch
    rubygems24-devel-2.6.14.3-1.30.11.amzn1.noarch
    ruby24-doc-2.4.5-1.30.11.amzn1.noarch
    ruby24-irb-2.4.5-1.30.11.amzn1.noarch

src:
    ruby20-2.0.0.648-1.32.amzn1.src
    ruby21-2.1.9-1.22.amzn1.src
    ruby24-2.4.5-1.30.11.amzn1.src

x86_64:
    ruby20-devel-2.0.0.648-1.32.amzn1.x86_64
    rubygem20-bigdecimal-1.2.0-1.32.amzn1.x86_64
    ruby20-debuginfo-2.0.0.648-1.32.amzn1.x86_64
    rubygem20-io-console-0.4.2-1.32.amzn1.x86_64
    ruby20-2.0.0.648-1.32.amzn1.x86_64
    rubygem20-psych-2.0.0-1.32.amzn1.x86_64
    ruby20-libs-2.0.0.648-1.32.amzn1.x86_64
    rubygem21-psych-2.0.5-1.22.amzn1.x86_64
    ruby21-devel-2.1.9-1.22.amzn1.x86_64
    ruby21-libs-2.1.9-1.22.amzn1.x86_64
    ruby21-debuginfo-2.1.9-1.22.amzn1.x86_64
    rubygem21-bigdecimal-1.2.4-1.22.amzn1.x86_64
    ruby21-2.1.9-1.22.amzn1.x86_64
    rubygem21-io-console-0.4.3-1.22.amzn1.x86_64
    rubygem24-json-2.0.4-1.30.11.amzn1.x86_64
    ruby24-devel-2.4.5-1.30.11.amzn1.x86_64
    ruby24-debuginfo-2.4.5-1.30.11.amzn1.x86_64
    rubygem24-bigdecimal-1.3.2-1.30.11.amzn1.x86_64
    rubygem24-io-console-0.4.6-1.30.11.amzn1.x86_64
    ruby24-2.4.5-1.30.11.amzn1.x86_64
    ruby24-libs-2.4.5-1.30.11.amzn1.x86_64
    rubygem24-xmlrpc-0.2.1-1.30.11.amzn1.x86_64
    rubygem24-psych-2.2.2-1.30.11.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2019-1255.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Cross-site scripting

EUVDB-ID: #VU20190

Risk: Low

CVSSv3.1: 3.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-8325

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform XSS attacks.

The vulnerability exists due to improper input validation when processing alerts in the Gem::CommandManager#run. A remote attacker can inject and execute arbitrary HTML or JavaScript code.

Mitigation

Update the affected packages:

i686:
    ruby20-libs-2.0.0.648-1.32.amzn1.i686
    ruby20-debuginfo-2.0.0.648-1.32.amzn1.i686
    rubygem20-bigdecimal-1.2.0-1.32.amzn1.i686
    ruby20-devel-2.0.0.648-1.32.amzn1.i686
    rubygem20-psych-2.0.0-1.32.amzn1.i686
    rubygem20-io-console-0.4.2-1.32.amzn1.i686
    ruby20-2.0.0.648-1.32.amzn1.i686
    ruby21-2.1.9-1.22.amzn1.i686
    rubygem21-bigdecimal-1.2.4-1.22.amzn1.i686
    ruby21-debuginfo-2.1.9-1.22.amzn1.i686
    rubygem21-io-console-0.4.3-1.22.amzn1.i686
    ruby21-devel-2.1.9-1.22.amzn1.i686
    rubygem21-psych-2.0.5-1.22.amzn1.i686
    ruby21-libs-2.1.9-1.22.amzn1.i686
    ruby24-2.4.5-1.30.11.amzn1.i686
    rubygem24-json-2.0.4-1.30.11.amzn1.i686
    rubygem24-bigdecimal-1.3.2-1.30.11.amzn1.i686
    ruby24-debuginfo-2.4.5-1.30.11.amzn1.i686
    rubygem24-io-console-0.4.6-1.30.11.amzn1.i686
    rubygem24-psych-2.2.2-1.30.11.amzn1.i686
    ruby24-libs-2.4.5-1.30.11.amzn1.i686
    rubygem24-xmlrpc-0.2.1-1.30.11.amzn1.i686
    ruby24-devel-2.4.5-1.30.11.amzn1.i686

noarch:
    ruby20-irb-2.0.0.648-1.32.amzn1.noarch
    ruby20-doc-2.0.0.648-1.32.amzn1.noarch
    rubygems20-devel-2.0.14.1-1.32.amzn1.noarch
    rubygems20-2.0.14.1-1.32.amzn1.noarch
    ruby21-irb-2.1.9-1.22.amzn1.noarch
    rubygems21-devel-2.2.5-1.22.amzn1.noarch
    ruby21-doc-2.1.9-1.22.amzn1.noarch
    rubygems21-2.2.5-1.22.amzn1.noarch
    rubygems24-2.6.14.3-1.30.11.amzn1.noarch
    rubygem24-did_you_mean-1.1.0-1.30.11.amzn1.noarch
    rubygems24-devel-2.6.14.3-1.30.11.amzn1.noarch
    ruby24-doc-2.4.5-1.30.11.amzn1.noarch
    ruby24-irb-2.4.5-1.30.11.amzn1.noarch

src:
    ruby20-2.0.0.648-1.32.amzn1.src
    ruby21-2.1.9-1.22.amzn1.src
    ruby24-2.4.5-1.30.11.amzn1.src

x86_64:
    ruby20-devel-2.0.0.648-1.32.amzn1.x86_64
    rubygem20-bigdecimal-1.2.0-1.32.amzn1.x86_64
    ruby20-debuginfo-2.0.0.648-1.32.amzn1.x86_64
    rubygem20-io-console-0.4.2-1.32.amzn1.x86_64
    ruby20-2.0.0.648-1.32.amzn1.x86_64
    rubygem20-psych-2.0.0-1.32.amzn1.x86_64
    ruby20-libs-2.0.0.648-1.32.amzn1.x86_64
    rubygem21-psych-2.0.5-1.22.amzn1.x86_64
    ruby21-devel-2.1.9-1.22.amzn1.x86_64
    ruby21-libs-2.1.9-1.22.amzn1.x86_64
    ruby21-debuginfo-2.1.9-1.22.amzn1.x86_64
    rubygem21-bigdecimal-1.2.4-1.22.amzn1.x86_64
    ruby21-2.1.9-1.22.amzn1.x86_64
    rubygem21-io-console-0.4.3-1.22.amzn1.x86_64
    rubygem24-json-2.0.4-1.30.11.amzn1.x86_64
    ruby24-devel-2.4.5-1.30.11.amzn1.x86_64
    ruby24-debuginfo-2.4.5-1.30.11.amzn1.x86_64
    rubygem24-bigdecimal-1.3.2-1.30.11.amzn1.x86_64
    rubygem24-io-console-0.4.6-1.30.11.amzn1.x86_64
    ruby24-2.4.5-1.30.11.amzn1.x86_64
    ruby24-libs-2.4.5-1.30.11.amzn1.x86_64
    rubygem24-xmlrpc-0.2.1-1.30.11.amzn1.x86_64
    rubygem24-psych-2.2.2-1.30.11.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2019-1255.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Cross-site scripting

EUVDB-ID: #VU20191

Risk: Low

CVSSv3.1: 3.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-8322

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data when displaying contents of the API response directly to stdout. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Update the affected packages:

i686:
    ruby20-libs-2.0.0.648-1.32.amzn1.i686
    ruby20-debuginfo-2.0.0.648-1.32.amzn1.i686
    rubygem20-bigdecimal-1.2.0-1.32.amzn1.i686
    ruby20-devel-2.0.0.648-1.32.amzn1.i686
    rubygem20-psych-2.0.0-1.32.amzn1.i686
    rubygem20-io-console-0.4.2-1.32.amzn1.i686
    ruby20-2.0.0.648-1.32.amzn1.i686
    ruby21-2.1.9-1.22.amzn1.i686
    rubygem21-bigdecimal-1.2.4-1.22.amzn1.i686
    ruby21-debuginfo-2.1.9-1.22.amzn1.i686
    rubygem21-io-console-0.4.3-1.22.amzn1.i686
    ruby21-devel-2.1.9-1.22.amzn1.i686
    rubygem21-psych-2.0.5-1.22.amzn1.i686
    ruby21-libs-2.1.9-1.22.amzn1.i686
    ruby24-2.4.5-1.30.11.amzn1.i686
    rubygem24-json-2.0.4-1.30.11.amzn1.i686
    rubygem24-bigdecimal-1.3.2-1.30.11.amzn1.i686
    ruby24-debuginfo-2.4.5-1.30.11.amzn1.i686
    rubygem24-io-console-0.4.6-1.30.11.amzn1.i686
    rubygem24-psych-2.2.2-1.30.11.amzn1.i686
    ruby24-libs-2.4.5-1.30.11.amzn1.i686
    rubygem24-xmlrpc-0.2.1-1.30.11.amzn1.i686
    ruby24-devel-2.4.5-1.30.11.amzn1.i686

noarch:
    ruby20-irb-2.0.0.648-1.32.amzn1.noarch
    ruby20-doc-2.0.0.648-1.32.amzn1.noarch
    rubygems20-devel-2.0.14.1-1.32.amzn1.noarch
    rubygems20-2.0.14.1-1.32.amzn1.noarch
    ruby21-irb-2.1.9-1.22.amzn1.noarch
    rubygems21-devel-2.2.5-1.22.amzn1.noarch
    ruby21-doc-2.1.9-1.22.amzn1.noarch
    rubygems21-2.2.5-1.22.amzn1.noarch
    rubygems24-2.6.14.3-1.30.11.amzn1.noarch
    rubygem24-did_you_mean-1.1.0-1.30.11.amzn1.noarch
    rubygems24-devel-2.6.14.3-1.30.11.amzn1.noarch
    ruby24-doc-2.4.5-1.30.11.amzn1.noarch
    ruby24-irb-2.4.5-1.30.11.amzn1.noarch

src:
    ruby20-2.0.0.648-1.32.amzn1.src
    ruby21-2.1.9-1.22.amzn1.src
    ruby24-2.4.5-1.30.11.amzn1.src

x86_64:
    ruby20-devel-2.0.0.648-1.32.amzn1.x86_64
    rubygem20-bigdecimal-1.2.0-1.32.amzn1.x86_64
    ruby20-debuginfo-2.0.0.648-1.32.amzn1.x86_64
    rubygem20-io-console-0.4.2-1.32.amzn1.x86_64
    ruby20-2.0.0.648-1.32.amzn1.x86_64
    rubygem20-psych-2.0.0-1.32.amzn1.x86_64
    ruby20-libs-2.0.0.648-1.32.amzn1.x86_64
    rubygem21-psych-2.0.5-1.22.amzn1.x86_64
    ruby21-devel-2.1.9-1.22.amzn1.x86_64
    ruby21-libs-2.1.9-1.22.amzn1.x86_64
    ruby21-debuginfo-2.1.9-1.22.amzn1.x86_64
    rubygem21-bigdecimal-1.2.4-1.22.amzn1.x86_64
    ruby21-2.1.9-1.22.amzn1.x86_64
    rubygem21-io-console-0.4.3-1.22.amzn1.x86_64
    rubygem24-json-2.0.4-1.30.11.amzn1.x86_64
    ruby24-devel-2.4.5-1.30.11.amzn1.x86_64
    ruby24-debuginfo-2.4.5-1.30.11.amzn1.x86_64
    rubygem24-bigdecimal-1.3.2-1.30.11.amzn1.x86_64
    rubygem24-io-console-0.4.6-1.30.11.amzn1.x86_64
    ruby24-2.4.5-1.30.11.amzn1.x86_64
    ruby24-libs-2.4.5-1.30.11.amzn1.x86_64
    rubygem24-xmlrpc-0.2.1-1.30.11.amzn1.x86_64
    rubygem24-psych-2.2.2-1.30.11.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2019-1255.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Cross-site scripting

EUVDB-ID: #VU20192

Risk: Low

CVSSv3.1: 3.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-8323

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in Gem::GemcutterUtilities#with_response when displaying data in the API. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Mitigation

Update the affected packages:

i686:
    ruby20-libs-2.0.0.648-1.32.amzn1.i686
    ruby20-debuginfo-2.0.0.648-1.32.amzn1.i686
    rubygem20-bigdecimal-1.2.0-1.32.amzn1.i686
    ruby20-devel-2.0.0.648-1.32.amzn1.i686
    rubygem20-psych-2.0.0-1.32.amzn1.i686
    rubygem20-io-console-0.4.2-1.32.amzn1.i686
    ruby20-2.0.0.648-1.32.amzn1.i686
    ruby21-2.1.9-1.22.amzn1.i686
    rubygem21-bigdecimal-1.2.4-1.22.amzn1.i686
    ruby21-debuginfo-2.1.9-1.22.amzn1.i686
    rubygem21-io-console-0.4.3-1.22.amzn1.i686
    ruby21-devel-2.1.9-1.22.amzn1.i686
    rubygem21-psych-2.0.5-1.22.amzn1.i686
    ruby21-libs-2.1.9-1.22.amzn1.i686
    ruby24-2.4.5-1.30.11.amzn1.i686
    rubygem24-json-2.0.4-1.30.11.amzn1.i686
    rubygem24-bigdecimal-1.3.2-1.30.11.amzn1.i686
    ruby24-debuginfo-2.4.5-1.30.11.amzn1.i686
    rubygem24-io-console-0.4.6-1.30.11.amzn1.i686
    rubygem24-psych-2.2.2-1.30.11.amzn1.i686
    ruby24-libs-2.4.5-1.30.11.amzn1.i686
    rubygem24-xmlrpc-0.2.1-1.30.11.amzn1.i686
    ruby24-devel-2.4.5-1.30.11.amzn1.i686

noarch:
    ruby20-irb-2.0.0.648-1.32.amzn1.noarch
    ruby20-doc-2.0.0.648-1.32.amzn1.noarch
    rubygems20-devel-2.0.14.1-1.32.amzn1.noarch
    rubygems20-2.0.14.1-1.32.amzn1.noarch
    ruby21-irb-2.1.9-1.22.amzn1.noarch
    rubygems21-devel-2.2.5-1.22.amzn1.noarch
    ruby21-doc-2.1.9-1.22.amzn1.noarch
    rubygems21-2.2.5-1.22.amzn1.noarch
    rubygems24-2.6.14.3-1.30.11.amzn1.noarch
    rubygem24-did_you_mean-1.1.0-1.30.11.amzn1.noarch
    rubygems24-devel-2.6.14.3-1.30.11.amzn1.noarch
    ruby24-doc-2.4.5-1.30.11.amzn1.noarch
    ruby24-irb-2.4.5-1.30.11.amzn1.noarch

src:
    ruby20-2.0.0.648-1.32.amzn1.src
    ruby21-2.1.9-1.22.amzn1.src
    ruby24-2.4.5-1.30.11.amzn1.src

x86_64:
    ruby20-devel-2.0.0.648-1.32.amzn1.x86_64
    rubygem20-bigdecimal-1.2.0-1.32.amzn1.x86_64
    ruby20-debuginfo-2.0.0.648-1.32.amzn1.x86_64
    rubygem20-io-console-0.4.2-1.32.amzn1.x86_64
    ruby20-2.0.0.648-1.32.amzn1.x86_64
    rubygem20-psych-2.0.0-1.32.amzn1.x86_64
    ruby20-libs-2.0.0.648-1.32.amzn1.x86_64
    rubygem21-psych-2.0.5-1.22.amzn1.x86_64
    ruby21-devel-2.1.9-1.22.amzn1.x86_64
    ruby21-libs-2.1.9-1.22.amzn1.x86_64
    ruby21-debuginfo-2.1.9-1.22.amzn1.x86_64
    rubygem21-bigdecimal-1.2.4-1.22.amzn1.x86_64
    ruby21-2.1.9-1.22.amzn1.x86_64
    rubygem21-io-console-0.4.3-1.22.amzn1.x86_64
    rubygem24-json-2.0.4-1.30.11.amzn1.x86_64
    ruby24-devel-2.4.5-1.30.11.amzn1.x86_64
    ruby24-debuginfo-2.4.5-1.30.11.amzn1.x86_64
    rubygem24-bigdecimal-1.3.2-1.30.11.amzn1.x86_64
    rubygem24-io-console-0.4.6-1.30.11.amzn1.x86_64
    ruby24-2.4.5-1.30.11.amzn1.x86_64
    ruby24-libs-2.4.5-1.30.11.amzn1.x86_64
    rubygem24-xmlrpc-0.2.1-1.30.11.amzn1.x86_64
    rubygem24-psych-2.2.2-1.30.11.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2019-1255.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Path traversal

EUVDB-ID: #VU20193

Risk: Low

CVSSv3.1: 2.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-8320

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in gems. A remote attacker can trick the victim to load a specially crafted gem and delete arbitrary files on the system.

Mitigation

Update the affected packages:

i686:
    ruby20-libs-2.0.0.648-1.32.amzn1.i686
    ruby20-debuginfo-2.0.0.648-1.32.amzn1.i686
    rubygem20-bigdecimal-1.2.0-1.32.amzn1.i686
    ruby20-devel-2.0.0.648-1.32.amzn1.i686
    rubygem20-psych-2.0.0-1.32.amzn1.i686
    rubygem20-io-console-0.4.2-1.32.amzn1.i686
    ruby20-2.0.0.648-1.32.amzn1.i686
    ruby21-2.1.9-1.22.amzn1.i686
    rubygem21-bigdecimal-1.2.4-1.22.amzn1.i686
    ruby21-debuginfo-2.1.9-1.22.amzn1.i686
    rubygem21-io-console-0.4.3-1.22.amzn1.i686
    ruby21-devel-2.1.9-1.22.amzn1.i686
    rubygem21-psych-2.0.5-1.22.amzn1.i686
    ruby21-libs-2.1.9-1.22.amzn1.i686
    ruby24-2.4.5-1.30.11.amzn1.i686
    rubygem24-json-2.0.4-1.30.11.amzn1.i686
    rubygem24-bigdecimal-1.3.2-1.30.11.amzn1.i686
    ruby24-debuginfo-2.4.5-1.30.11.amzn1.i686
    rubygem24-io-console-0.4.6-1.30.11.amzn1.i686
    rubygem24-psych-2.2.2-1.30.11.amzn1.i686
    ruby24-libs-2.4.5-1.30.11.amzn1.i686
    rubygem24-xmlrpc-0.2.1-1.30.11.amzn1.i686
    ruby24-devel-2.4.5-1.30.11.amzn1.i686

noarch:
    ruby20-irb-2.0.0.648-1.32.amzn1.noarch
    ruby20-doc-2.0.0.648-1.32.amzn1.noarch
    rubygems20-devel-2.0.14.1-1.32.amzn1.noarch
    rubygems20-2.0.14.1-1.32.amzn1.noarch
    ruby21-irb-2.1.9-1.22.amzn1.noarch
    rubygems21-devel-2.2.5-1.22.amzn1.noarch
    ruby21-doc-2.1.9-1.22.amzn1.noarch
    rubygems21-2.2.5-1.22.amzn1.noarch
    rubygems24-2.6.14.3-1.30.11.amzn1.noarch
    rubygem24-did_you_mean-1.1.0-1.30.11.amzn1.noarch
    rubygems24-devel-2.6.14.3-1.30.11.amzn1.noarch
    ruby24-doc-2.4.5-1.30.11.amzn1.noarch
    ruby24-irb-2.4.5-1.30.11.amzn1.noarch

src:
    ruby20-2.0.0.648-1.32.amzn1.src
    ruby21-2.1.9-1.22.amzn1.src
    ruby24-2.4.5-1.30.11.amzn1.src

x86_64:
    ruby20-devel-2.0.0.648-1.32.amzn1.x86_64
    rubygem20-bigdecimal-1.2.0-1.32.amzn1.x86_64
    ruby20-debuginfo-2.0.0.648-1.32.amzn1.x86_64
    rubygem20-io-console-0.4.2-1.32.amzn1.x86_64
    ruby20-2.0.0.648-1.32.amzn1.x86_64
    rubygem20-psych-2.0.0-1.32.amzn1.x86_64
    ruby20-libs-2.0.0.648-1.32.amzn1.x86_64
    rubygem21-psych-2.0.5-1.22.amzn1.x86_64
    ruby21-devel-2.1.9-1.22.amzn1.x86_64
    ruby21-libs-2.1.9-1.22.amzn1.x86_64
    ruby21-debuginfo-2.1.9-1.22.amzn1.x86_64
    rubygem21-bigdecimal-1.2.4-1.22.amzn1.x86_64
    ruby21-2.1.9-1.22.amzn1.x86_64
    rubygem21-io-console-0.4.3-1.22.amzn1.x86_64
    rubygem24-json-2.0.4-1.30.11.amzn1.x86_64
    ruby24-devel-2.4.5-1.30.11.amzn1.x86_64
    ruby24-debuginfo-2.4.5-1.30.11.amzn1.x86_64
    rubygem24-bigdecimal-1.3.2-1.30.11.amzn1.x86_64
    rubygem24-io-console-0.4.6-1.30.11.amzn1.x86_64
    ruby24-2.4.5-1.30.11.amzn1.x86_64
    ruby24-libs-2.4.5-1.30.11.amzn1.x86_64
    rubygem24-xmlrpc-0.2.1-1.30.11.amzn1.x86_64
    rubygem24-psych-2.2.2-1.30.11.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2019-1255.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

6) Cross-site scripting

EUVDB-ID: #VU20194

Risk: Low

CVSSv3.1: 3.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-8321

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in Gem::UserInteraction#verbose. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Mitigation

Update the affected packages:

i686:
    ruby20-libs-2.0.0.648-1.32.amzn1.i686
    ruby20-debuginfo-2.0.0.648-1.32.amzn1.i686
    rubygem20-bigdecimal-1.2.0-1.32.amzn1.i686
    ruby20-devel-2.0.0.648-1.32.amzn1.i686
    rubygem20-psych-2.0.0-1.32.amzn1.i686
    rubygem20-io-console-0.4.2-1.32.amzn1.i686
    ruby20-2.0.0.648-1.32.amzn1.i686
    ruby21-2.1.9-1.22.amzn1.i686
    rubygem21-bigdecimal-1.2.4-1.22.amzn1.i686
    ruby21-debuginfo-2.1.9-1.22.amzn1.i686
    rubygem21-io-console-0.4.3-1.22.amzn1.i686
    ruby21-devel-2.1.9-1.22.amzn1.i686
    rubygem21-psych-2.0.5-1.22.amzn1.i686
    ruby21-libs-2.1.9-1.22.amzn1.i686
    ruby24-2.4.5-1.30.11.amzn1.i686
    rubygem24-json-2.0.4-1.30.11.amzn1.i686
    rubygem24-bigdecimal-1.3.2-1.30.11.amzn1.i686
    ruby24-debuginfo-2.4.5-1.30.11.amzn1.i686
    rubygem24-io-console-0.4.6-1.30.11.amzn1.i686
    rubygem24-psych-2.2.2-1.30.11.amzn1.i686
    ruby24-libs-2.4.5-1.30.11.amzn1.i686
    rubygem24-xmlrpc-0.2.1-1.30.11.amzn1.i686
    ruby24-devel-2.4.5-1.30.11.amzn1.i686

noarch:
    ruby20-irb-2.0.0.648-1.32.amzn1.noarch
    ruby20-doc-2.0.0.648-1.32.amzn1.noarch
    rubygems20-devel-2.0.14.1-1.32.amzn1.noarch
    rubygems20-2.0.14.1-1.32.amzn1.noarch
    ruby21-irb-2.1.9-1.22.amzn1.noarch
    rubygems21-devel-2.2.5-1.22.amzn1.noarch
    ruby21-doc-2.1.9-1.22.amzn1.noarch
    rubygems21-2.2.5-1.22.amzn1.noarch
    rubygems24-2.6.14.3-1.30.11.amzn1.noarch
    rubygem24-did_you_mean-1.1.0-1.30.11.amzn1.noarch
    rubygems24-devel-2.6.14.3-1.30.11.amzn1.noarch
    ruby24-doc-2.4.5-1.30.11.amzn1.noarch
    ruby24-irb-2.4.5-1.30.11.amzn1.noarch

src:
    ruby20-2.0.0.648-1.32.amzn1.src
    ruby21-2.1.9-1.22.amzn1.src
    ruby24-2.4.5-1.30.11.amzn1.src

x86_64:
    ruby20-devel-2.0.0.648-1.32.amzn1.x86_64
    rubygem20-bigdecimal-1.2.0-1.32.amzn1.x86_64
    ruby20-debuginfo-2.0.0.648-1.32.amzn1.x86_64
    rubygem20-io-console-0.4.2-1.32.amzn1.x86_64
    ruby20-2.0.0.648-1.32.amzn1.x86_64
    rubygem20-psych-2.0.0-1.32.amzn1.x86_64
    ruby20-libs-2.0.0.648-1.32.amzn1.x86_64
    rubygem21-psych-2.0.5-1.22.amzn1.x86_64
    ruby21-devel-2.1.9-1.22.amzn1.x86_64
    ruby21-libs-2.1.9-1.22.amzn1.x86_64
    ruby21-debuginfo-2.1.9-1.22.amzn1.x86_64
    rubygem21-bigdecimal-1.2.4-1.22.amzn1.x86_64
    ruby21-2.1.9-1.22.amzn1.x86_64
    rubygem21-io-console-0.4.3-1.22.amzn1.x86_64
    rubygem24-json-2.0.4-1.30.11.amzn1.x86_64
    ruby24-devel-2.4.5-1.30.11.amzn1.x86_64
    ruby24-debuginfo-2.4.5-1.30.11.amzn1.x86_64
    rubygem24-bigdecimal-1.3.2-1.30.11.amzn1.x86_64
    rubygem24-io-console-0.4.6-1.30.11.amzn1.x86_64
    ruby24-2.4.5-1.30.11.amzn1.x86_64
    ruby24-libs-2.4.5-1.30.11.amzn1.x86_64
    rubygem24-xmlrpc-0.2.1-1.30.11.amzn1.x86_64
    rubygem24-psych-2.2.2-1.30.11.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2019-1255.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.