Vulnerability identifier: #VU62378

Vulnerability risk: High

CVSSv3.1:

CVE-ID: CVE-2021-31873

CWE-ID: CWE-190

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
klibc
Operating systems & Components / Operating system package or component

Vendor:

Description

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

The vulnerability exists due to integer overflow in the malloc() function. A remote attacker can pass specially crafted data to the application, trigger integer overflow and execute arbitrary code on the target system.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

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External links
http://kernel.org/pub/linux/libs/klibc/2.0/
http://lists.zytor.com/archives/klibc/2021-April/004593.html
http://git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/?id=a31ae8c508fc8d1bca4f57e9f9f88127572d5202
http://www.openwall.com/lists/oss-security/2021/04/30/1
http://lists.debian.org/debian-lts-announce/2021/06/msg00025.html

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?