Bug 1656210 (CVE-2018-19755)

Summary:	CVE-2018-19755 nasm: out-of-bounds array access in is_mmacro in asm/preproc.c
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	ASSIGNED ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	dominik, java-sig-commits, mizdebsk, nickc
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
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Regression:	---	Mount Type:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1656211, 1656464, 1656465
Bug Blocks:	1656212

Description Laura Pardo 2018-12-04 22:45:26 UTC

A flaw was found in Netwide Assembler (NASM) 2.14rc16. There is an illegal address access in is_mmacro function at asm/preproc.c that will cause a denial of service (out-of-bounds array access) because a certain conversion can result in a negative integer. 


References:
https://bugzilla.nasm.us/show_bug.cgi?id=3392528 
https://repo.or.cz/nasm.git/commit/3079f7966dbed4497e36d5067cbfd896a90358cb

Comment 1 Laura Pardo 2018-12-04 22:45:49 UTC

Created nasm tracking bugs for this issue:

Affects: fedora-all [bug 1656211]

Comment 3 Stefan Cornelius 2018-12-05 15:12:07 UTC

Statement:

This issue affects the versions of nasm as shipped with Red Hat Enterprise Linux 5, 6, and 7.

Red Hat Enterprise Linux 5 is now in Extended Life Phase of the support and maintenance life cycle. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.

Red Hat Enterprise Linux 6 is now in Maintenance Support 2 Phase of the support and maintenance life cycle. This has been rated as having a security impact of Low, and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.