Bug 1668321 (CVE-2019-6291) - CVE-2019-6291 nasm: Recursive calls in the function expr resulting in a denial of service
Summary: CVE-2019-6291 nasm: Recursive calls in the function expr resulting in a denia...
Keywords:
Status: NEW
Alias: CVE-2019-6291
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1668322 1716234 1716235
Blocks: 1668324
TreeView+ depends on / blocked
 
Reported: 2019-01-22 12:45 UTC by Dhananjay Arunesh
Modified: 2019-09-29 15:05 UTC (History)
4 users (show)

Fixed In Version:
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Description Dhananjay Arunesh 2019-01-22 12:45:59 UTC

An issue was discovered in the function expr6 in eval.c in Netwide Assembler
(NASM) through 2.14.02. There is a stack exhaustion problem caused by the expr6
function making recursive calls to itself in certain scenarios involving lots of
'!' or '+' or '-' characters. Remote attackers could leverage this vulnerability
to cause a denial-of-service via a crafted asm file.


Upstream Issue:

https://bugzilla.nasm.us/show_bug.cgi?id=3392549

Comment 1 Dhananjay Arunesh 2019-01-22 12:46:11 UTC
Created nasm tracking bugs for this issue:

Affects: fedora-all [bug 1668322]

Comment 3 Stefan Cornelius 2019-06-02 22:34:34 UTC
Statement:

This issue affects the versions of nasm as shipped with Red Hat Enterprise Linux 5, 6, 7, and 8.

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/.


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