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Security Advisory Important: mingw32-libxml2 security update

Advisory: RHSA-2013:0217-1
Type: Security Advisory
Severity: Important
Issued on: 2013-01-31
Last updated on: 2013-01-31
Affected Products: Red Hat Enterprise Linux Desktop (v. 6)
Red Hat Enterprise Linux HPC Node (v. 6)
Red Hat Enterprise Linux Server (v. 6)
Red Hat Enterprise Linux Server EUS (v. 6.3.z)
Red Hat Enterprise Linux Workstation (v. 6)
CVEs (cve.mitre.org): CVE-2010-4008
CVE-2010-4494
CVE-2011-0216
CVE-2011-1944
CVE-2011-2821
CVE-2011-2834
CVE-2011-3102
CVE-2011-3905
CVE-2011-3919
CVE-2012-0841
CVE-2012-5134

Details

Updated mingw32-libxml2 packages that fix several security issues are now
available for Red Hat Enterprise Linux 6. This advisory also contains
information about future updates for the mingw32 packages, as well as the
deprecation of the packages with the release of Red Hat
Enterprise Linux 6.4.

The Red Hat Security Response Team has rated this update as having
important 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.

These packages provide the libxml2 library, a development toolbox providing
the implementation of various XML standards, for users of MinGW (Minimalist
GNU for Windows).

IMPORTANT NOTE: The mingw32 packages in Red Hat Enterprise Linux 6 will no
longer be updated proactively and will be deprecated with the release of
Red Hat Enterprise Linux 6.4. These packages were provided to support other
capabilities in Red Hat Enterprise Linux and were not intended for direct
customer use. Customers are advised to not use these packages with
immediate effect. Future updates to these packages will be at Red Hat's
discretion and these packages may be removed in a future minor release.

A heap-based buffer overflow flaw was found in the way libxml2 decoded
entity references with long names. A remote attacker could provide a
specially-crafted XML file that, when opened in an application linked
against libxml2, would cause the application to crash or, potentially,
execute arbitrary code with the privileges of the user running the
application. (CVE-2011-3919)

A heap-based buffer underflow flaw was found in the way libxml2 decoded
certain entities. A remote attacker could provide a specially-crafted XML
file that, when opened in an application linked against libxml2, would
cause the application to crash or, potentially, execute arbitrary code with
the privileges of the user running the application. (CVE-2012-5134)

It was found that the hashing routine used by libxml2 arrays was
susceptible to predictable hash collisions. Sending a specially-crafted
message to an XML service could result in longer processing time, which
could lead to a denial of service. To mitigate this issue, randomization
has been added to the hashing function to reduce the chance of an attacker
successfully causing intentional collisions. (CVE-2012-0841)

Multiple flaws were found in the way libxml2 parsed certain XPath (XML Path
Language) expressions. If an attacker were able to supply a
specially-crafted XML file to an application using libxml2, as well as an
XPath expression for that application to run against the crafted file, it
could cause the application to crash. (CVE-2010-4008, CVE-2010-4494,
CVE-2011-2821, CVE-2011-2834)

Two heap-based buffer overflow flaws were found in the way libxml2 decoded
certain XML files. A remote attacker could provide a specially-crafted XML
file that, when opened in an application linked against libxml2, would
cause the application to crash or, potentially, execute arbitrary code with
the privileges of the user running the application. (CVE-2011-0216,
CVE-2011-3102)

An integer overflow flaw, leading to a heap-based buffer overflow, was
found in the way libxml2 parsed certain XPath expressions. If an attacker
were able to supply a specially-crafted XML file to an application using
libxml2, as well as an XPath expression for that application to run against
the crafted file, it could cause the application to crash or, possibly,
execute arbitrary code. (CVE-2011-1944)

An out-of-bounds memory read flaw was found in libxml2. A remote attacker
could provide a specially-crafted XML file that, when opened in an
application linked against libxml2, would cause the application to crash.
(CVE-2011-3905)

Red Hat would like to thank the Google Security Team for reporting the
CVE-2010-4008 issue. Upstream acknowledges Bui Quang Minh from Bkis as the
original reporter of CVE-2010-4008.

All users of mingw32-libxml2 are advised to upgrade to these updated
packages, which contain backported patches to correct these issues.


Solution

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

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/knowledge/articles/11258

Updated packages

Red Hat Enterprise Linux Desktop (v. 6)

SRPMS:
mingw32-libxml2-2.7.6-6.el6_3.src.rpm     MD5: 4e37e4e6198c40b2aa88e7fa4dc2a9fe
SHA-256: 954a5fbe3b2637a55c906d77fbc63a08ff16c91afbcef5ef404056d2cf8d8ead
 
x86_64:
mingw32-libxml2-2.7.6-6.el6_3.noarch.rpm     MD5: 2f4699ae7c7ec05c787f3c8581d0130b
SHA-256: 640b68ef5786fbf49a8bc6576b7eaa58d9274a7cd795f5a6c00196ec6b24e79e
mingw32-libxml2-debuginfo-2.7.6-6.el6_3.noarch.rpm     MD5: f4f5cd1569abc7aea6c4dd5afef4cb13
SHA-256: 2a3f46e55e7aea6c1fbe1016bb237ef355a198ffd4fb21149a2be1fcc830b952
mingw32-libxml2-static-2.7.6-6.el6_3.noarch.rpm     MD5: f17a10958765a7a7732ad2428e5056ef
SHA-256: 7f96be5a45937850effd8ee3a8dcf0a262a572ffbf389aa7557eba2352c4eafe
 
Red Hat Enterprise Linux HPC Node (v. 6)

SRPMS:
mingw32-libxml2-2.7.6-6.el6_3.src.rpm     MD5: 4e37e4e6198c40b2aa88e7fa4dc2a9fe
SHA-256: 954a5fbe3b2637a55c906d77fbc63a08ff16c91afbcef5ef404056d2cf8d8ead
 
x86_64:
mingw32-libxml2-2.7.6-6.el6_3.noarch.rpm     MD5: 2f4699ae7c7ec05c787f3c8581d0130b
SHA-256: 640b68ef5786fbf49a8bc6576b7eaa58d9274a7cd795f5a6c00196ec6b24e79e
mingw32-libxml2-debuginfo-2.7.6-6.el6_3.noarch.rpm     MD5: f4f5cd1569abc7aea6c4dd5afef4cb13
SHA-256: 2a3f46e55e7aea6c1fbe1016bb237ef355a198ffd4fb21149a2be1fcc830b952
mingw32-libxml2-static-2.7.6-6.el6_3.noarch.rpm     MD5: f17a10958765a7a7732ad2428e5056ef
SHA-256: 7f96be5a45937850effd8ee3a8dcf0a262a572ffbf389aa7557eba2352c4eafe
 
Red Hat Enterprise Linux Server (v. 6)

SRPMS:
mingw32-libxml2-2.7.6-6.el6_3.src.rpm     MD5: 4e37e4e6198c40b2aa88e7fa4dc2a9fe
SHA-256: 954a5fbe3b2637a55c906d77fbc63a08ff16c91afbcef5ef404056d2cf8d8ead
 
x86_64:
mingw32-libxml2-2.7.6-6.el6_3.noarch.rpm     MD5: 2f4699ae7c7ec05c787f3c8581d0130b
SHA-256: 640b68ef5786fbf49a8bc6576b7eaa58d9274a7cd795f5a6c00196ec6b24e79e
mingw32-libxml2-debuginfo-2.7.6-6.el6_3.noarch.rpm     MD5: f4f5cd1569abc7aea6c4dd5afef4cb13
SHA-256: 2a3f46e55e7aea6c1fbe1016bb237ef355a198ffd4fb21149a2be1fcc830b952
mingw32-libxml2-static-2.7.6-6.el6_3.noarch.rpm     MD5: f17a10958765a7a7732ad2428e5056ef
SHA-256: 7f96be5a45937850effd8ee3a8dcf0a262a572ffbf389aa7557eba2352c4eafe
 
Red Hat Enterprise Linux Server EUS (v. 6.3.z)

SRPMS:
mingw32-libxml2-2.7.6-6.el6_3.src.rpm     MD5: 4e37e4e6198c40b2aa88e7fa4dc2a9fe
SHA-256: 954a5fbe3b2637a55c906d77fbc63a08ff16c91afbcef5ef404056d2cf8d8ead
 
x86_64:
mingw32-libxml2-2.7.6-6.el6_3.noarch.rpm     MD5: 2f4699ae7c7ec05c787f3c8581d0130b
SHA-256: 640b68ef5786fbf49a8bc6576b7eaa58d9274a7cd795f5a6c00196ec6b24e79e
mingw32-libxml2-debuginfo-2.7.6-6.el6_3.noarch.rpm     MD5: f4f5cd1569abc7aea6c4dd5afef4cb13
SHA-256: 2a3f46e55e7aea6c1fbe1016bb237ef355a198ffd4fb21149a2be1fcc830b952
mingw32-libxml2-static-2.7.6-6.el6_3.noarch.rpm     MD5: f17a10958765a7a7732ad2428e5056ef
SHA-256: 7f96be5a45937850effd8ee3a8dcf0a262a572ffbf389aa7557eba2352c4eafe
 
Red Hat Enterprise Linux Workstation (v. 6)

SRPMS:
mingw32-libxml2-2.7.6-6.el6_3.src.rpm     MD5: 4e37e4e6198c40b2aa88e7fa4dc2a9fe
SHA-256: 954a5fbe3b2637a55c906d77fbc63a08ff16c91afbcef5ef404056d2cf8d8ead
 
x86_64:
mingw32-libxml2-2.7.6-6.el6_3.noarch.rpm     MD5: 2f4699ae7c7ec05c787f3c8581d0130b
SHA-256: 640b68ef5786fbf49a8bc6576b7eaa58d9274a7cd795f5a6c00196ec6b24e79e
mingw32-libxml2-debuginfo-2.7.6-6.el6_3.noarch.rpm     MD5: f4f5cd1569abc7aea6c4dd5afef4cb13
SHA-256: 2a3f46e55e7aea6c1fbe1016bb237ef355a198ffd4fb21149a2be1fcc830b952
mingw32-libxml2-static-2.7.6-6.el6_3.noarch.rpm     MD5: f17a10958765a7a7732ad2428e5056ef
SHA-256: 7f96be5a45937850effd8ee3a8dcf0a262a572ffbf389aa7557eba2352c4eafe
 
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

645341 - CVE-2010-4008 libxml2: Crash (stack frame overflow or NULL pointer dereference) by traversal of XPath axis
665963 - CVE-2010-4494 libxml2: double-free in XPath processing code
709747 - CVE-2011-1944 libxml, libxml2: Heap-based buffer overflow by adding new namespace node to an existing nodeset or merging nodesets
724906 - CVE-2011-0216 libxml2: Off-by-one error leading to heap-based buffer overflow in encoding
735712 - CVE-2011-2821 libxml2: double free caused by malformed XPath expression in XSLT
735751 - CVE-2011-2834 libxml2: double-free caused by malformed XPath expression in XSLT
767387 - CVE-2011-3905 libxml2 out of bounds read
771896 - CVE-2011-3919 libxml2: Heap-based buffer overflow when decoding an entity reference with a long name
787067 - CVE-2012-0841 libxml2: hash table collisions CPU usage DoS
822109 - CVE-2011-3102 libxml: An off-by-one out-of-bounds write by XPointer part evaluation
880466 - CVE-2012-5134 libxml2: Heap-buffer-underflow in xmlParseAttValueComplex


References



These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from:
https://www.redhat.com/security/team/key/#package

The Red Hat security contact is secalert@redhat.com. More contact details at http://www.redhat.com/security/team/contact/