Bug 860769

Summary: CVE-2012-3509 libiberty: integer overflow, leading to heap-buffer overflow by processing certain file headers via bfd binary [fedora-all]
Product: [Fedora] Fedora Reporter: Jan Lieskovsky <jlieskov>
Component: gdbAssignee: Jan Kratochvil <jan.kratochvil>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: 17CC: gbenson, jan.kratochvil, palves, pmuldoon, sergiodj, tromey
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Release Note
Doc Text:
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Clone Of: Environment:
Last Closed: 2012-11-16 10:21:12 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:    
Bug Blocks: 849693    

Description Jan Lieskovsky 2012-09-26 16:42:07 UTC 
This is an automatically created tracking bug!  It was created to ensure
that one or more security vulnerabilities are fixed in affected Fedora
versions.

For comments that are specific to the vulnerability please use bugs filed
against "Security Response" product referenced in the "Blocks" field.

For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs

When creating a Bodhi update request, please include this bug ID and the
bug IDs of this bug's parent bugs filed against the "Security Response"
product (the top-level CVE bugs).  Please mention the CVE IDs being fixed
in the RPM changelog when available.

Bodhi update submission link:
https://admin.fedoraproject.org/updates/new/?type_=security&bugs=849693

Please note: this issue affects multiple supported versions of Fedora.
Only one tracking bug has been filed; please ensure that it is only closed
when all affected versions are fixed.

[bug automatically created by: add-tracking-bugs]
Comment 1 Jan Lieskovsky 2012-11-16 10:21:12 UTC 
Closing this bug as invalid. See:
  https://bugzilla.redhat.com/show_bug.cgi?id=849693#c33

for further details. The deficiency in the libiberty code itself is present in gdb code. But due to a way how the underlying buffer pre-allocated via libiberty is later used in gdb it is not possible to use this flaw in gdb to reach arbitrary code execution (the buffer is zeroed right after allocation, making the invalid write to be limited to the ability to write zeroes only). Therefore as such the maximum available security implication here is a crash.

Red Hat Security Response Team does not consider user-assisted crash of end-user application, such as gdb, to be a security flaw.