Bug 1478913

Summary:	nasm: "paste_tokens()" heap-based buffer overflow
Product:	[Other] Security Response	Reporter:	Stefan Cornelius <scorneli>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	java-sig-commits, mizdebsk, msimacek
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2017-08-07 13:41:06 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1472886

Description Stefan Cornelius 2017-08-07 13:34:36 UTC

A heap-based buffer overflow was reported in the "paste_tokens()" function in asm/preproc.c of nasm. An attacker could exploit this flaw to cause a crash or, possible, execute arbitrary code by tricking a user to process a specially crafted file using nasm.

External references:

Upstream bug report:
https://bugzilla.nasm.us/show_bug.cgi?id=3392415

Patch:
http://repo.or.cz/nasm.git/blobdiff/20d9c86eb1e088efe0093b31f6fb0952971566f1..f9ec5bbd2af6ff5276f1fd5ab52df4ed7b096344:/asm/preproc.c

Comment 2 Stefan Cornelius 2017-08-07 13:41:13 UTC

Statement:

Red Hat Product Security has rated this issue as having Moderate security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.