Denial of service in NASM

1) Input validation error

EUVDB-ID: #VU84812

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-21528

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input within the ieee_segment() function in outieee.c. A remote attacker can pass specially crafted assembly file to the compiler and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

NASM: 2.14.03 - 2.15

CPE2.3

• cpe:2.3:a:nasm_sourceforge_net:nasm:2.14.03:*:*:*:*:*:*:*
• cpe:2.3:a:nasm_sourceforge_net:nasm:2.15:*:*:*:*:*:*:*

External links

https://bugzilla.nasm.us/show_bug.cgi?id=3392637
https://security.gentoo.org/glsa/202312-09

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.