Bug 1977975 (CVE-2021-35942)

Summary:	CVE-2021-35942 glibc: Arbitrary read in wordexp()
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	aoliva, arjun.is, ashankar, bdettelb, caswilli, codonell, dj, fweimer, glibc-bugzilla, jnakfour, kaycoth, law, mcermak, mfabian, mnewsome, pfrankli, rth, sipoyare, tomckay, vmugicag
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	glibc 2.34	Doc Type:	If docs needed, set a value
Doc Text:	An integer overflow flaw was found in glibc that may result in reading of arbitrary memory when wordexp is used with a specially crafted untrusted regular expression input.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-11-09 21:52:43 UTC	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:	1977976, 1979125, 1979126, 1979127, 1979128
Bug Blocks:	1977977

Description Pedro Sampaio 2021-06-30 20:04:59 UTC

An integer overflow flaw was found in glibc before 2.34 that may result in reading of arbitrary memory when wordexp is used with a specially
crafted untrusted regular expression input.

References:

https://sourceware.org/bugzilla/show_bug.cgi?id=28011
https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=5adda61f62b77384718b4c0d8336ade8f2b4b35c
https://sourceware.org/glibc/wiki/Security%20Exceptions

Comment 1 Pedro Sampaio 2021-06-30 20:05:30 UTC

Created glibc tracking bugs for this issue:

Affects: fedora-all [bug 1977976]

Comment 3 errata-xmlrpc 2021-11-09 18:28:22 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4358 https://access.redhat.com/errata/RHSA-2021:4358

Comment 4 Product Security DevOps Team 2021-11-09 21:52:40 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-35942