Bug 1737445 (CVE-2019-1010025)

Summary:	CVE-2019-1010025 glibc: information disclosure of heap addresses of pthread_created thread
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	aoliva, arjun, ashankar, codonell, dj, fweimer, glibc-bugzilla, law, mfabian, mnewsome, pfrankli, rth, siddhesh, yozone
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:
Last Closed:	2019-08-07 01:18:18 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:	1737446
Bug Blocks:	1737447

Description Dhananjay Arunesh 2019-08-05 11:30:46 UTC

GNU Libc current is affected by: Mitigation bypass. The impact is: Attacker may
guess the heap addresses of pthread_created thread. The component is: glibc.

Reference:
https://sourceware.org/bugzilla/show_bug.cgi?id=22853

Comment 1 Dhananjay Arunesh 2019-08-05 11:31:11 UTC

Created glibc tracking bugs for this issue:

Affects: fedora-all [bug 1737446]

Comment 3 Marco Benatto 2019-08-06 21:43:15 UTC

The information disclosure mentioned by CVE-2019-1010025 is not considered a vulnerability and its fix should be considered a hardening instead.
Although it's possible to eventually leak the thread heap's address by passing the ASLR mechanism, this bug is not exploitable by itself. An attack can not use this directly to perform any unexpected action, although this can be used to exploit any other unrelated software which consumes glibc's pthread API.

Comment 4 Marco Benatto 2019-08-06 21:49:21 UTC

Statement:

This is does not affect the package glibc as shipped with Red Hat Enterprise Linux 5, 6,7 and 8. The bug related to this CVE is not exploitable.

Comment 5 Product Security DevOps Team 2019-08-07 01:18:18 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-2019-1010025