Bug 1553369 (CVE-2018-0491)

Summary: CVE-2018-0491 tor: use-after-free in KIST implementation
Product: [Other] Security Response Reporter: Laura Pardo <lpardo>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: lewk, mh, rh-bugzilla, s
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: tor 0.2.9.15, tor 0.3.2.10, tor 0.3.1.10, tor 0.3.3.3-alpha Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2021-10-21 19:57:41 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: 1553356    
Bug Blocks:    

Description Laura Pardo 2018-03-08 18:21:34 UTC
A use-after-free issue was discovered in Tor 0.3.2.x before 0.3.2.10. It allows remote attackers to cause a denial of service (relay crash) because the KIST implementation allows a channel to be added more than once in the pending list. 

References:
https://trac.torproject.org/projects/tor/ticket/24700
https://trac.torproject.org/projects/tor/ticket/25117
https://blog.torproject.org/new-stable-tor-releases-security-fixes-and-dos-prevention-03210-03110-02915

Comment 1 Laura Pardo 2018-03-08 18:24:41 UTC
Created tor tracking bugs for this issue:

Affects: epel-6 [bug 1553356]