PT-2019-18078 · Netwide+2 · Netwide Assembler+2

Cheng Wen · Published 2019-01-15 · Updated 2024-12-08 · CVE-2019-6291

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 Netwide Assembler (NASM) versions prior to 2.14.03

Description A stack exhaustion problem exists due to the expr6 function making recursive calls to itself in certain scenarios involving lots of '!' or '+' or '-' characters. This could allow remote attackers to cause a denial-of-service via a crafted asm file.

Recommendations For versions prior to 2.14.03, update to version 2.14.03 or later to resolve the issue. As a temporary workaround, consider restricting the use of the expr6 function in eval.c to minimize the risk of exploitation. Avoid using crafted asm files that could trigger the recursive calls until the issue is resolved.

Exploit

Fix

DoS

Uncontrolled Recursion

Weakness Enumeration

CWE-674

Related Identifiers

ALT-PU-2020-2243

ALT-PU-2024-16552

CVE-2019-6291

Affected Products

Alt Linux

Debian

Netwide Assembler

References · 34

• 🔥 https://bugzilla.nasm.us/show_bug.cgi?id=3392549 · Exploit
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-18780 · Security Note
• https://ubuntu.com/security/CVE-2019-6291 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6290 · Security Note
• https://bdu.fstec.ru/vul/2019-02930 · Security Note
• https://security-tracker.debian.org/tracker/source-package/nasm · Vendor Advisory
• 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://cve.org/CVERecord?id=CVE-2019-6291 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2019-6291 · Vendor Advisory
• 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
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-21686 · Security Note