Bug 1383297 (CVE-2016-6323)

Summary:	CVE-2016-6323 glibc: Missing unwind info in __startcontext causes infinite loop in _Unwind_Backtrace
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	arjun.is, ashankar, codonell, dj, fweimer, jakub, law, mfabian, mnewsome, pfrankli, sardella, siddhesh, tcallawa
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	glibc 2.25	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-10-10 11:57:17 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:	1383298, 1383311
Bug Blocks:	1383299

Description Adam Mariš 2016-10-10 11:36:07 UTC

Missing unwind info in __startcontext was found that can lead to infinite loop in _Unwind_Backtrace. Generating stack trace in application code compiled with gccgo can trigger this, causing the affected process hanging up instead of error message.

Upstream bug:

https://sourceware.org/bugzilla/show_bug.cgi?id=20435

Comment 1 Adam Mariš 2016-10-10 11:36:40 UTC

Created glibc tracking bugs for this issue:

Affects: fedora-all [bug 1383298]

Comment 2 Adam Mariš 2016-10-10 11:57:17 UTC

Affects only ARM EABI (32-bit) platforms.

Comment 3 Adam Mariš 2016-10-10 11:59:47 UTC

Created glibc-arm-linux-gnu tracking bugs for this issue:

Affects: fedora-all [bug 1383311]