Bug 2234910 (CVE-2020-18780)

Summary:	CVE-2020-18780 nasm: use-after-free in new_Token() in asm/preproc.c
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	nickc, sipoyare
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	nasm 2.14.04rc6, nasm 2.15.05	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2234956, 2234965, 2234966
Bug Blocks:	2234904

Description Guilherme de Almeida Suckevicz 2023-08-25 18:12:03 UTC

A Use After Free vulnerability in function new_Token in asm/preproc.c in nasm 2.14.02 allows attackers to cause a denial of service via crafted nasm command.

Reference:
https://bugzilla.nasm.us/show_bug.cgi?id=3392634

Comment 1 Guilherme de Almeida Suckevicz 2023-08-25 19:07:27 UTC

Created nasm tracking bugs for this issue:

Affects: fedora-all [bug 2234956]

Comment 3 Pedro Sampaio 2023-09-27 15:08:28 UTC

Upstream commit:

https://github.com/netwide-assembler/nasm/commit/7c88289e222dc5ef9f53f9e86ecaab1924744b88