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Red Hat: RHSA-2011-0844-01 Low Severity: DoS Flaw in APR

red hat
Calendar Grey May 31, 2011
Scroller Redhat
Minor security patch released for Red Hat apr to combat potential DoS vulnerability. Solutions provided for various RHEL iterations.
Updated apr packages that fix one security issue are now available for Red Hat Enterprise Linux 4, 5, and 6

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/kb/docs/DOC-11259

Summary

The Apache Portable Runtime (APR) is a portability library used by the Apache HTTP Server and other projects. It provides a free library of C data structures and routines.
The fix for CVE-2011-0419 (released via RHSA-2011:0507) introduced an infinite loop flaw in the apr_fnmatch() function when the APR_FNM_PATHNAME matching flag was used. A remote attacker could possibly use this flaw to cause a denial of service on an application using the apr_fnmatch() function. (CVE-2011-1928)
Note: This problem affected httpd configurations using the "Location" directive with wildcard URLs. The denial of service could have been triggered during normal operation; it did not specifically require a malicious HTTP request.
This update also addresses additional problems introduced by the rewrite of the apr_fnmatch() function, which was necessary to address the CVE-2011-0419 flaw.
All apr users should upgrade to these updated packages, which contain a backported patch to correct this issue. Applications using the apr library, such as httpd, must be restarted for this update to take effect.

Topics%20covered

Topics Covered

security advisory DoS Red Hat Enterprise Linux low severity apr security update

References

https://access.redhat.com/security/cve/CVE-2011-1928 https://access.redhat.com/security/updates/classification#low https://access.redhat.com/errata/RHSA-2011:0507.html

Package List

Red Hat Enterprise Linux AS version 4:
Source:
i386: apr-0.9.4-26.el4.i386.rpm apr-debuginfo-0.9.4-26.el4.i386.rpm apr-devel-0.9.4-26.el4.i386.rpm
ia64: apr-0.9.4-26.el4.i386.rpm apr-0.9.4-26.el4.ia64.rpm apr-debuginfo-0.9.4-26.el4.i386.rpm apr-debuginfo-0.9.4-26.el4.ia64.rpm apr-devel-0.9.4-26.el4.ia64.rpm
ppc: apr-0.9.4-26.el4.ppc.rpm apr-0.9.4-26.el4.ppc64.rpm apr-debuginfo-0.9.4-26.el4.ppc.rpm apr-debuginfo-0.9.4-26.el4.ppc64.rpm apr-devel-0.9.4-26.el4.ppc.rpm
s390: apr-0.9.4-26.el4.s390.rpm apr-debuginfo-0.9.4-26.el4.s390.rpm apr-devel-0.9.4-26.el4.s390.rpm
s390x: apr-0.9.4-26.el4.s390.rpm apr-0.9.4-26.el4.s390x.rpm apr-debuginfo-0.9.4-26.el4.s390.rpm apr-debuginfo-0.9.4-26.el4.s390x.rpm apr-devel-0.9.4-26.el4.s390x.rpm
x86_64: apr-0.9.4-26.el4.i386.rpm apr-0.9.4-26.el4.x86_64.rpm apr-debuginfo-0.9.4-26.el4.i386.rpm apr-debuginfo-0.9.4-26.el4.x86_64.rpm apr-devel-0.9.4-26.el4.x86_64.rpm
Red Hat Enterprise Linux Desktop version 4:
Source:
i386: apr-0.9.4-26.el4.i386.rpm apr-debuginfo-0.9.4-26.el4.i386.rpm apr-devel-0.9.4-26.el4.i386.rpm
x86_64: apr-0.9.4-26.el4.i386.rpm apr-0.9.4-26.el4.x86_64.rpm apr-debuginfo-0.9.4-26.el4.i386.rpm apr-debuginfo-0.9.4-26.el4.x86_64.rpm apr-devel-0.9.4-26.el4.x86_64.rpm
Red Hat Enterprise Linux ES version 4:
Source:
i386:

Read the Full Advisory


Severity
low
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2011:0844-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2011:0844.html
Issue date: 2011-05-31

Topic

Updated apr packages that fix one security issue are now available forRed Hat Enterprise Linux 4, 5, and 6.The Red Hat Security Response Team has rated this update as having lowsecurity impact. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available from the CVE link inthe References section.

Topics%20covered

Topics Covered

security advisory DoS Red Hat Enterprise Linux low severity apr security update

Relevant Releases Architectures

RHEL Desktop Workstation (v. 5 client) - i386, x86_64

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64

Red Hat Enterprise Linux Desktop version 4 - i386, x86_64

Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - x86_64

Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

Bugs Fixed

706203 - CVE-2011-1928 apr: DoS flaw in apr_fnmatch() due to fix for CVE-2011-0419

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