Bug 1209105 (CVE-2015-1473)

Summary:	CVE-2015-1473 glibc: Stack-overflow in glibc swscanf
Product:	[Other] Security Response	Reporter:	Huzaifa S. Sidhpurwala <huzaifas>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	arjun.is, ashankar, codonell, fweimer, jakub, jrusnack, law, msebor, pfrankli, slawomir, spoyarek
Target Milestone:	---	Keywords:	Reopened, Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	A stack overflow flaw was found in glibc's swscanf() function. An attacker able to make an application call the swscanf() function could use this flaw to crash that application or, potentially, execute arbitrary code with the permissions of the user running the application.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-11-20 05:54:22 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:	1209106, 1209107
Bug Blocks:	1188240, 1210268, 1262918

Description Huzaifa S. Sidhpurwala 2015-04-06 06:55:10 UTC

It was found that the malloc fallback logic when running *scanf() does not have happen at the precise moment (scanf choses between heap and stack), this can lead to a stack-overflow in certain configurations.

Reference:

https://security-tracker.debian.org/tracker/CVE-2015-1473

Comment 2 Martin Sebor 2015-06-03 18:08:24 UTC

This report is a duplicate of bug 1188235 - (CVE-2015-1472) CVE-2015-1472 glibc: heap buffer overflow in glibc swscanf.

Comment 3 Huzaifa S. Sidhpurwala 2015-07-17 06:00:31 UTC

(In reply to Martin Sebor from comment #2)
> This report is a duplicate of bug 1188235 - (CVE-2015-1472) CVE-2015-1472
> glibc: heap buffer overflow in glibc swscanf.

Not as per debian, see difference between:

https://security-tracker.debian.org/tracker/CVE-2015-1472 and
https://security-tracker.debian.org/tracker/CVE-2015-1473

Comment 5 Martin Sebor 2015-07-17 14:48:07 UTC

(In reply to Huzaifa S. Sidhpurwala from comment #3)
> Not as per debian, see difference between:
> 
> https://security-tracker.debian.org/tracker/CVE-2015-1472 and
> https://security-tracker.debian.org/tracker/CVE-2015-1473

Sorry, I don't see it. The upstream bug and fix are the same in both:

Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=16618
Fix: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=5bd80bfe9ca0d955bfbbc002781bc7b01b6bcb06

Comment 6 Vincent Danen 2015-08-22 05:59:37 UTC

Statement:

This issue does not affect the version of glibc package as shipped with Red Hat Enterprise Linux 5 and 6.

Comment 8 errata-xmlrpc 2015-11-19 04:17:19 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:2199 https://rhn.redhat.com/errata/RHSA-2015-2199.html

Comment 9 errata-xmlrpc 2015-12-09 08:58:25 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.1 EUS - Server and Compute Node Only
  Red Hat Enterprise Linux 7.1 EUS  - Server and Compute Node Only

Via RHSA-2015:2589 https://rhn.redhat.com/errata/RHSA-2015-2589.html