Amazon Linux AMI update for libxml2

1) Buffer overflow

EUVDB-ID: #VU32739

Risk: Medium

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

CVE-ID: CVE-2012-5134

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

Heap-based buffer underflow in the xmlParseAttValueComplex function in parser.c in libxml2 2.9.0 and earlier, as used in Google Chrome before 23.0.1271.91 and other products, allows remote attackers to cause a denial of service or possibly execute arbitrary code via crafted entities in an XML document.

Mitigation

Update the affected packages:

i686:
    libxml2-python-2.7.8-10.25.amzn1.i686
    libxml2-static-2.7.8-10.25.amzn1.i686
    libxml2-2.7.8-10.25.amzn1.i686
    libxml2-debuginfo-2.7.8-10.25.amzn1.i686
    libxml2-devel-2.7.8-10.25.amzn1.i686

src:
    libxml2-2.7.8-10.25.amzn1.src

x86_64:
    libxml2-static-2.7.8-10.25.amzn1.x86_64
    libxml2-debuginfo-2.7.8-10.25.amzn1.x86_64
    libxml2-2.7.8-10.25.amzn1.x86_64
    libxml2-python-2.7.8-10.25.amzn1.x86_64
    libxml2-devel-2.7.8-10.25.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-2012-143.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.