Vulnerability · Published Aug 22, 2023 · Assigned by mitre
CVE-2020-21687
Medium 5.5
In plain English
A medium-severity security flaw in the nasm package (Debian). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.4%top 61.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
Buffer Overflow vulnerability in scan function in stdscan.c in nasm 2.15rc0 allows remote attackers to cause a denial of service via crafted asm file.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | nasm | 2.15.04-1 | DEBIAN-CVE-2020-21687 |
| Debian:13 | nasm | 2.15.04-1 | DEBIAN-CVE-2020-21687 |
| Debian:14 | nasm | 2.15.04-1 | DEBIAN-CVE-2020-21687 |
| Ubuntu:22.04:LTS | nasm | no fix listed | UBUNTU-CVE-2020-21687 |
| Ubuntu:24.04:LTS | nasm | no fix listed | UBUNTU-CVE-2020-21687 |