RHSA-2015:1675 - Security Advisory

Topic

Updated libunwind packages that fix a security flaw are now available for
Red Hat Enterprise Linux OpenStack Platform 6.0.

Red Hat Product Security has rated this update as having Low security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.

Description

Libunwind provides a C ABI to determine the call-chain of a program.

An off by one array indexing error was found in libunwind. It is unlikely
that any exploitable attack vector exists in current builds or supported
usage. (CVE-2015-3239)

This issue was discovered by Paolo Bonzini of Red Hat.

All users of libunwind are advised to upgrade to these updated packages,
which correct this issue.

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat OpenStack 6.0 x86_64

Fixes

• BZ - 1232265 - CVE-2015-3239 libunwind: off-by-one in dwarf_to_unw_regnum()

CVEs

• CVE-2015-3239

References

• https://access.redhat.com/security/updates/classification/#low