CVE-2016-5844: Integer Overflow
First published: Sun Jun 26 2016(Updated: )
Hanno Böck has disclosed another Undefined Behaviour (signed integer overflow) on oss-security: <a href="http://seclists.org/oss-sec/2016/q2/591">http://seclists.org/oss-sec/2016/q2/591</a> Upstream ticket: <a href="https://github.com/libarchive/libarchive/issues/717">https://github.com/libarchive/libarchive/issues/717</a> Upstream fix (released in libarchive-3.2.1): <a href="https://github.com/libarchive/libarchive/commit/3ad08e0">https://github.com/libarchive/libarchive/commit/3ad08e0</a> While the UB exists in 3.2.0, an earlier patch seems to mitigate against the issue: <a href="https://github.com/libarchive/libarchive/commit/e6c9668f">https://github.com/libarchive/libarchive/commit/e6c9668f</a> This function is called immediately after the overflow, and will immediately reject a negative skipsize with ARCHIVE_FATAL, skipping all further processing. Previous releases up to and including 3.1.2 (including 2.8.3, 2.8.4) do not include the mitigation and are thus likely vulnerable.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/libarchive | <3.2.1 | 3.2.1 |
| Oracle Libarchive | <=3.2.0 | |
| Red Hat Enterprise Linux Desktop | =6.0 | |
| Red Hat Enterprise Linux HPC Node | =6.0 | |
| Red Hat Enterprise Linux Server | =6.0 | |
| Red Hat Enterprise Linux Workstation | =6.0 | |
| Red Hat Enterprise Linux Desktop | =7.0 | |
| Red Hat Enterprise Linux HPC Node | =7.0 | |
| Red Hat Enterprise Linux HPC Node | =7.2 | |
| Red Hat Enterprise Linux Server | =7.0 | |
| Red Hat Enterprise Linux Server | =7.2 | |
| Red Hat Enterprise Linux Server | =7.2 | |
| Red Hat Enterprise Linux Workstation | =7.0 | |
| Oracle Linux | =6 | |
| Oracle Linux | =7 | |
| Oracle Solaris and Zettabyte File System (ZFS) | =11.3 |
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Reference Links
- http://seclists.org/oss-sec/2016/q2/591
- https://github.com/libarchive/libarchive/issues/717
- https://github.com/libarchive/libarchive/commit/3ad08e0
- https://github.com/libarchive/libarchive/commit/e6c9668f
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1352776
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1352775
- https://rhn.redhat.com/errata/RHSA-2016-1850.html
- https://rhn.redhat.com/errata/RHSA-2016-1844.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1350280
- http://rhn.redhat.com/errata/RHSA-2016-1844.html
- http://rhn.redhat.com/errata/RHSA-2016-1850.html
- http://www.debian.org/security/2016/dsa-3657
- http://www.openwall.com/lists/oss-security/2016/06/23/6
- http://www.openwall.com/lists/oss-security/2016/06/24/4
- http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
- http://www.securityfocus.com/bid/91808
- http://www.securitytracker.com/id/1036173
- https://blog.fuzzing-project.org/48-Out-of-bounds-read-and-signed-integer-overflow-in-libarchive.html
- https://github.com/libarchive/libarchive/commit/3ad08e01b4d253c66ae56414886089684155af22
- https://security.gentoo.org/glsa/201701-03
Frequently Asked Questions
What is the severity of CVE-2016-5844?
CVE-2016-5844 is classified as a high severity vulnerability due to the potential for exploitation through signed integer overflow.
How do I fix CVE-2016-5844?
To mitigate CVE-2016-5844, update to libarchive version 3.2.1 or later.
What software is affected by CVE-2016-5844?
CVE-2016-5844 affects libarchive versions prior to 3.2.1.
Can CVE-2016-5844 impact all versions of Red Hat Enterprise Linux?
Yes, CVE-2016-5844 can impact Red Hat Enterprise Linux version 6.0 and 7.0 as well as specific applications built on older versions of libarchive.
Is there an exploit available for CVE-2016-5844?
As of now, public details about an exploit specifically targeting CVE-2016-5844 have not been disclosed.
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