Cloud Vulnerability DB
A community-led vulnerabilities database
Vulnerability DatabaseCVE-2020-21685
CVE-2020-21685:
Linux Debian vulnerability analysis and mitigation
Overview
Buffer Overflow vulnerability was discovered in the hashfindi function in hashtbl.c in NASM (Netwide Assembler) version 2.15rc0. This vulnerability allows remote attackers to cause a denial of service via a crafted ASM file (NVD, [Nasm Bugzilla](https://bugzilla.nasm.us/showbug.cgi?id=3392644)).
Technical details
The vulnerability exists in the hash_findi function at line 157 of hashtbl.c. When processing certain crafted ASM files, a heap-buffer-overflow condition occurs during string length calculation. The issue has been assigned a CVSS v3.1 Base Score of 5.5 MEDIUM with vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H (NVD).
Impact
The vulnerability can be exploited to cause a denial of service condition on the affected system. When triggered, it results in a heap-buffer-overflow that can crash the NASM assembler (NVD).
Mitigation and workarounds
The vulnerability has been fixed in later versions of NASM. Users should upgrade to a version newer than 2.15rc0. The fix was confirmed to be present in nasm-2.15.04rc5-4-g51e23ac7 (Nasm Bugzilla).
Additional resources
Source: This report was generated using AI
Related Linux Debian vulnerabilities:
Free Vulnerability Assessment
Benchmark your Cloud Security Posture
Evaluate your cloud security practices across 9 security domains to benchmark your risk level and identify gaps in your defenses.
Additional Wiz resources
Get a personalized demo
Ready to see Wiz in action?
"Best User Experience I have ever seen, provides full visibility to cloud workloads."
David EstlickCISO
"Wiz provides a single pane of glass to see what is going on in our cloud environments."
Adam FletcherChief Security Officer
"We know that if Wiz identifies something as critical, it actually is."
Greg PoniatowskiHead of Threat and Vulnerability Management