CVE-2020-21687 — Out-of-bounds Write in Nasm

CWE-787 — Out-of-bounds WriteCWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer5 documents5 sources
Severity
5.5MEDIUMNVD
EPSS
0.5%
top 35.00%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
NasmDebian NasmNasm Netwide Assembler
Timeline
PublishedAug 22

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.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6

Affected Packages3 packages

▶debiandebian/nasm< nasm 2.15.04-1 (bookworm)
▶Debiannasm/nasm< 2.15.04-1+3

🔴Vulnerability Details

2
GHSA
GHSA-mrj6-gwrp-fxf5: Buffer Overflow vulnerability in scan function in stdscan↗2023-08-22
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OSV
CVE-2020-21687: Buffer Overflow vulnerability in scan function in stdscan↗2023-08-22
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📋Vendor Advisories

2
Red Hat
nasm: stack-based buffer overflow in stdscan() in stdscan.c↗2020-01-06
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Debian
CVE-2020-21687: nasm - Buffer Overflow vulnerability in scan function in stdscan.c in nasm 2.15rc0 allo...↗2020
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