Amazon Linux AMI update for libqb

1) Buffer overflow

EUVDB-ID: #VU79803

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-39976

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error in log_blackbox.c. A remote attacker can send an overly long log message tp the application, trigger memory corruption and execute arbitrary code on the target system.

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

Mitigation

Update the affected packages:

aarch64:
    libqb-debuginfo-2.0.6-1.amzn2023.0.1.aarch64
    doxygen2man-debuginfo-2.0.6-1.amzn2023.0.1.aarch64
    doxygen2man-2.0.6-1.amzn2023.0.1.aarch64
    libqb-debugsource-2.0.6-1.amzn2023.0.1.aarch64
    libqb-2.0.6-1.amzn2023.0.1.aarch64
    libqb-devel-2.0.6-1.amzn2023.0.1.aarch64

src:
    libqb-2.0.6-1.amzn2023.0.1.src

x86_64:
    libqb-debuginfo-2.0.6-1.amzn2023.0.1.x86_64
    libqb-debugsource-2.0.6-1.amzn2023.0.1.x86_64
    doxygen2man-debuginfo-2.0.6-1.amzn2023.0.1.x86_64
    doxygen2man-2.0.6-1.amzn2023.0.1.x86_64
    libqb-2.0.6-1.amzn2023.0.1.x86_64
    libqb-devel-2.0.6-1.amzn2023.0.1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

libqb: before 2.0.6-1

CPE2.3

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

External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-294.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.