Amazon Linux AMI update for mod_security

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU41813

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2013-5705

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

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

apache2/modsecurity.c in ModSecurity before 2.7.6 allows remote attackers to bypass rules by using chunked transfer coding with a capitalized Chunked value in the Transfer-Encoding HTTP header.

Mitigation

Update the affected packages:

i686:
    mlogc-2.7.3-3.23.amzn1.i686
    mod_security-2.7.3-3.23.amzn1.i686
    mod_security-debuginfo-2.7.3-3.23.amzn1.i686

src:
    mod_security-2.7.3-3.23.amzn1.src

x86_64:
    mod_security-2.7.3-3.23.amzn1.x86_64
    mlogc-2.7.3-3.23.amzn1.x86_64
    mod_security-debuginfo-2.7.3-3.23.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-2014-335.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.