Amazon Linux AMI update for spamassassin

1) Improper input validation

EUVDB-ID: #VU16549

Risk: Low

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-15705

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists in Apache SpamAssassin, using HTML::Parser due to an the "open" event is immediately followed by a "close" event - even if the tag *does not* close in the HTML being parsed when an object and hook are setup into the begin and end tag event handlers. A remote attacker can supply certain unclosed tags in specially crafted emails that cause markup to be handled incorrectly leading to scan timeouts.

Mitigation

Update the affected packages:

i686:
    spamassassin-debuginfo-3.4.2-2.14.amzn1.i686
    spamassassin-3.4.2-2.14.amzn1.i686

src:
    spamassassin-3.4.2-2.14.amzn1.src

x86_64:
    spamassassin-debuginfo-3.4.2-2.14.amzn1.x86_64
    spamassassin-3.4.2-2.14.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*

External links

https://alas.aws.amazon.com/ALAS-2018-1091.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) Improper input validation

EUVDB-ID: #VU16310

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2018-11780

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to a remote code execution bug in the PDFInfo plug-in when handling malicious input. A remote unauthenticated attacker can trick the victim into opening a specially crafted email message and execute arbitrary code with elevated privileges.

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

Mitigation

Update the affected packages:

i686:
    spamassassin-debuginfo-3.4.2-2.14.amzn1.i686
    spamassassin-3.4.2-2.14.amzn1.i686

src:
    spamassassin-3.4.2-2.14.amzn1.src

x86_64:
    spamassassin-debuginfo-3.4.2-2.14.amzn1.x86_64
    spamassassin-3.4.2-2.14.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*

External links

https://alas.aws.amazon.com/ALAS-2018-1091.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) Code injection

EUVDB-ID: #VU16311

Risk: Low

CVSSv4.0: 7.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Clear]

CVE-ID: CVE-2018-11781

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

Exploit availability: No

Description

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

The vulnerability exists due to a code injection condition in the meta rule syntax that exists when rules are processed by the affected software. A local attacker can supply specially crafted data and execute arbitrary code with elevated privileges.

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

Mitigation

Update the affected packages:

i686:
    spamassassin-debuginfo-3.4.2-2.14.amzn1.i686
    spamassassin-3.4.2-2.14.amzn1.i686

src:
    spamassassin-3.4.2-2.14.amzn1.src

x86_64:
    spamassassin-debuginfo-3.4.2-2.14.amzn1.x86_64
    spamassassin-3.4.2-2.14.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*

External links

https://alas.aws.amazon.com/ALAS-2018-1091.html

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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