Amazon Linux AMI update for libksba

1) Integer overflow

EUVDB-ID: #VU68376

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-2022-3515

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

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

The vulnerability exists due to integer overflow within the CRL parser in libksba. A remote attacker can pass specially crafted data to the application, trigger an integer overflow 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:

i686:
    libksba-1.3.5-1.10.amzn1.i686
    libksba-devel-1.3.5-1.10.amzn1.i686
    libksba-debuginfo-1.3.5-1.10.amzn1.i686

src:
    libksba-1.3.5-1.10.amzn1.src

x86_64:
    libksba-1.3.5-1.10.amzn1.x86_64
    libksba-debuginfo-1.3.5-1.10.amzn1.x86_64
    libksba-devel-1.3.5-1.10.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

libksba: before 1.3.5-1.10

CPE2.3

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

External links

https://alas.aws.amazon.com/ALAS-2022-1649.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.