#VU63553 Integer overflow in gmp - CVE-2021-43618

Vulnerability identifier: #VU63553

Vulnerability 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-2021-43618

CWE-ID: CWE-190

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
gmp
Other software / Other software solutions

Vendor: gmplib.org

Description

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

The vulnerability exists due to integer overflow in mpz/inp_raw.c. A remote attacker can pass specially crafted data to the application, trigger integer overflow and cause a denial of service condition on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

gmp: 6.2.0 - 6.2.1

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External links
https://gmplib.org/list-archives/gmp-bugs/2021-September/005077.html
https://bugs.debian.org/994405
https://gmplib.org/repo/gmp-6.2/rev/561a9c25298e
https://lists.debian.org/debian-lts-announce/2021/12/msg00001.html

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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.