Vulnerability · Published Aug 22, 2023 · Assigned by mitre
CVE-2020-21686
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 38% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.4%top 61.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A stack-use-after-scope issue discovered in expand_mmac_params function in preproc.c in nasm before 2.15.04 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-2020-21686 |
| Debian:13 | nasm | 2.15.04-1 | DEBIAN-CVE-2020-21686 |
| Debian:14 | nasm | 2.15.04-1 | DEBIAN-CVE-2020-21686 |
Affected products (as reported)
Weakness: CWE-562