Bug 1340099 (CVE-2016-5034)

Summary: CVE-2016-5034 libdwarf: Out-of-bounds write in dwarf_elf_access.c
Product: [Other] Security Response Reporter: Andrej Nemec <anemec>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED WONTFIX QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: fche, orion
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Last Closed: 2019-06-08 02:52:56 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1340128, 1340129    
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Description Andrej Nemec 2016-05-26 12:47:58 UTC
An out-of-bounds write was found in libdwarf. Test object shows an invalid write in dwarf_elf_access.c (when doing the relocations). Adding the relocation value to anything overflowed and disguised the bad relocation record. With a 32bit kernel build the test could show a double-free and coredump due to the unchecked invalid writes from relocations.

References:

http://seclists.org/oss-sec/2016/q2/393

External references:

https://www.prevanders.net/dwarfbug.html

Upstream fix:

https://sourceforge.net/p/libdwarf/code/ci/10ca310f64368dc083efacac87732c02ef560a92

Comment 1 Andrej Nemec 2016-05-26 13:42:27 UTC
Created libdwarf tracking bugs for this issue:

Affects: fedora-all [bug 1340128]
Affects: epel-6 [bug 1340129]