Amazon Linux AMI update for libxml2

1) Out-of-bounds read

EUVDB-ID: #VU81044

Risk: Medium

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:Green]

CVE-ID: CVE-2023-39615

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition within the xmlSAX2StartElement() function in /libxml2/SAX2.c. A remote attacker can pass specially crafted XML input to the application, trigger an out-of-bounds read error and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

i686:
    libxml2-devel-2.9.1-6.6.43.amzn1.i686
    libxml2-2.9.1-6.6.43.amzn1.i686
    libxml2-debuginfo-2.9.1-6.6.43.amzn1.i686
    libxml2-static-2.9.1-6.6.43.amzn1.i686
    libxml2-python27-2.9.1-6.6.43.amzn1.i686
    libxml2-python26-2.9.1-6.6.43.amzn1.i686

src:
    libxml2-2.9.1-6.6.43.amzn1.src

x86_64:
    libxml2-python26-2.9.1-6.6.43.amzn1.x86_64
    libxml2-2.9.1-6.6.43.amzn1.x86_64
    libxml2-debuginfo-2.9.1-6.6.43.amzn1.x86_64
    libxml2-python27-2.9.1-6.6.43.amzn1.x86_64
    libxml2-static-2.9.1-6.6.43.amzn1.x86_64
    libxml2-devel-2.9.1-6.6.43.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

libxml2: All versions

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*
• cpe:2.3:a:amazon_web_services:libxml2:*:*:*:*:*:amazon_linux_ami:*:*

External links

https://alas.aws.amazon.com/ALAS-2023-1841.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.