PT-2023-11598 · Nasm+2 · Nasm+2

Suhwan · Published 2023-08-22 · Updated 2024-12-08 · CVE-2020-21686

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions nasm versions prior to 2.15.04

Description A stack-use-after-scope issue was discovered in the expand mmac params function in preproc.c, allowing remote attackers to cause a denial of service via a crafted asm file. This issue affects the nasm software and can be exploited by sending a specially crafted file to the affected system.

Recommendations For versions prior to 2.15.04, update to version 2.15.04 or later to resolve the issue. As a temporary workaround, consider restricting access to the preproc.c component or the expand mmac params function until a patch is available.

Exploit

Fix

DoS

Weakness Enumeration

CWE-562

Related Identifiers

ALT-PU-2024-16552

CVE-2020-21686

OESA-2024-1814

Affected Products

Alt Linux

Astra Linux

Nasm

References · 40

• 🔥 https://bugzilla.nasm.us/show_bug.cgi?id=3392643 · Exploit
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-18780 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6290 · Security Note
• https://wiki.astralinux.ru/pages/viewpage.action?pageId=158612043 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-21686 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-21686 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-21687 · Security Note
• https://bdu.fstec.ru/vul/2019-02930 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-8343 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20334 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2020-21685 · Security Note
• https://bdu.fstec.ru/vul/2023-02141 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6291 · Security Note
• https://bdu.fstec.ru/vul/2023-05881 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-44370 · Security Note