Amazon Linux AMI update for libxml2

Published: 2024-08-06

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-28484 CVE-2023-29469
CWE-ID	CWE-476 CWE-399
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Amazon Linux AMI Operating systems & Components / Operating system libxml2 Operating systems & Components / Operating system package or component
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) NULL pointer dereference

EUVDB-ID: #VU74863

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-28484

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a NULL pointer dereference error in xmlSchemaFixupComplexType. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

aarch64:
    libxml2-debugsource-2.10.4-1.amzn2023.0.1.aarch64
    python3-libxml2-debuginfo-2.10.4-1.amzn2023.0.1.aarch64
    libxml2-static-2.10.4-1.amzn2023.0.1.aarch64
    libxml2-debuginfo-2.10.4-1.amzn2023.0.1.aarch64
    python3-libxml2-2.10.4-1.amzn2023.0.1.aarch64
    libxml2-2.10.4-1.amzn2023.0.1.aarch64
    libxml2-devel-2.10.4-1.amzn2023.0.1.aarch64

src:
    libxml2-2.10.4-1.amzn2023.0.1.src

x86_64:
    libxml2-debugsource-2.10.4-1.amzn2023.0.1.x86_64
    python3-libxml2-debuginfo-2.10.4-1.amzn2023.0.1.x86_64
    libxml2-static-2.10.4-1.amzn2023.0.1.x86_64
    libxml2-debuginfo-2.10.4-1.amzn2023.0.1.x86_64
    libxml2-devel-2.10.4-1.amzn2023.0.1.x86_64
    python3-libxml2-2.10.4-1.amzn2023.0.1.x86_64
    libxml2-2.10.4-1.amzn2023.0.1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

libxml2: before 2.10.4-1

External links

http://alas.aws.amazon.com/AL2023/ALAS-2023-163.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) Resource management error

EUVDB-ID: #VU74862