Amazon Linux AMI update for ruby20

Published: 2015-05-27

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2014-1492 CVE-2015-1855
CWE-ID	CWE-20
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 2 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU32555

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2014-1492

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to manipulate data.

The cert_TestHostName function in lib/certdb/certdb.c in the certificate-checking implementation in Mozilla Network Security Services (NSS) before 3.16 accepts a wildcard character that is embedded in an internationalized domain name's U-label, which might allow man-in-the-middle attackers to spoof SSL servers via a crafted certificate.

Mitigation

Update the affected packages:

i686:
    rubygem20-bigdecimal-1.2.0-1.25.amzn1.i686
    rubygem20-psych-2.0.0-1.25.amzn1.i686
    ruby20-debuginfo-2.0.0.645-1.25.amzn1.i686
    ruby20-libs-2.0.0.645-1.25.amzn1.i686
    ruby20-devel-2.0.0.645-1.25.amzn1.i686
    rubygem20-io-console-0.4.2-1.25.amzn1.i686
    ruby20-2.0.0.645-1.25.amzn1.i686

noarch:
    ruby20-doc-2.0.0.645-1.25.amzn1.noarch
    ruby20-irb-2.0.0.645-1.25.amzn1.noarch
    rubygems20-2.0.14-1.25.amzn1.noarch
    rubygems20-devel-2.0.14-1.25.amzn1.noarch

src:
    ruby20-2.0.0.645-1.25.amzn1.src

x86_64:
    ruby20-debuginfo-2.0.0.645-1.25.amzn1.x86_64
    rubygem20-io-console-0.4.2-1.25.amzn1.x86_64
    ruby20-2.0.0.645-1.25.amzn1.x86_64
    rubygem20-bigdecimal-1.2.0-1.25.amzn1.x86_64
    ruby20-devel-2.0.0.645-1.25.amzn1.x86_64
    ruby20-libs-2.0.0.645-1.25.amzn1.x86_64
    rubygem20-psych-2.0.0-1.25.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2015-531.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) Input validation error

EUVDB-ID: #VU35016