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Bug 918547 (CVE-2020-21685, CVE-2020-21686, CVE-2020-21687) - dev-lang/nasm: multiple vulnerabilities
Summary: dev-lang/nasm: multiple vulnerabilities
Status: RESOLVED INVALID
Alias: CVE-2020-21685, CVE-2020-21686, CVE-2020-21687
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Security
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Reported: 2023-11-25 18:31 UTC by John Helmert III
Modified: 2023-11-25 18:31 UTC (History)
1 user (show)

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Description John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2023-11-25 18:31:13 UTC 
CVE-2020-21685 (https://bugzilla.nasm.us/show_bug.cgi?id=3392644):

Buffer Overflow vulnerability in hash_findi function in hashtbl.c in nasm 2.15rc0 allows remote attackers to cause a denial of service via crafted asm file.

CVE-2020-21687 (https://bugzilla.nasm.us/show_bug.cgi?id=3392645):

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.

Upstream couldn't reproduce, so calling these invalid for now, I guess.
Comment 1 John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2023-11-25 18:31:43 UTC 
CVE-2020-21686 (https://bugzilla.nasm.us/show_bug.cgi?id=3392643):

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.