Bug 1406314 (CVE-2016-1254)

Summary: CVE-2016-1254 tor: Remote DoS via parsing problem
Product: [Other] Security Response Reporter: Andrej Nemec <anemec>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: lewk, pwouters, s
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: tor 0.2.8.12, tor 0.2.9.8 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2017-03-03 14:31:22 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: 1406316, 1406317    
Bug Blocks:    

Description Andrej Nemec 2016-12-20 09:12:41 UTC
It was found that there is an issue with parsing that could ause clients to read a single byte past the end of an allocated region. This bug could be used to cause hardened clients (built with --enable-expensive-hardening) to crash if they tried to visit a hostile hidden service. Non-hardened clients are only affected depending on the details of their platform's memory allocator.

External References:

https://lists.torproject.org/pipermail/tor-announce/2016-December/000122.html

Upstream patch:

https://gitweb.torproject.org/tor.git/commit/?id=d978216dea6b21ac38230a59d172139185a68dbd

Comment 1 Andrej Nemec 2016-12-20 09:14:08 UTC
Created tor tracking bugs for this issue:

Affects: fedora-all [bug 1406316]
Affects: epel-all [bug 1406317]