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Subject:	Security ERRATA Important: glibc on SL6.x i386/x86_64
From:	Troy Dawson <[log in to unmask]>
Reply To:	Troy Dawson <[log in to unmask]>
Date:	Thu, 3 Mar 2011 15:20:24 -0600
Content-Type:	text/plain
Parts/Attachments:	text/plain (55 lines)

Synopsis:	Important: glibc security and bug fix update
Issue date:	2010-11-10
CVE Names:	CVE-2010-3847 CVE-2010-3856

It was discovered that the glibc dynamic linker/loader did not handle 
the $ORIGIN dynamic string token set in the LD_AUDIT environment 
variable securely. A local attacker with write access to a file system 
containing setuid or setgid binaries could use this flaw to escalate 
their privileges. (CVE-2010-3847)

It was discovered that the glibc dynamic linker/loader did not perform
sufficient safety checks when loading dynamic shared objects (DSOs) to
provide callbacks for its auditing API during the execution of 
privileged programs. A local attacker could use this flaw to escalate 
their privileges via a carefully-chosen system DSO library containing 
unsafe constructors. (CVE-2010-3856)

This update also fixes the following bugs:

* Previously, the generic implementation of the strstr() and memmem()
functions did not handle certain periodic patterns correctly and could 
find a false positive match. This error has been fixed, and both 
functions now work as expected. (BZ#643341)

* The "TCB_ALIGNMENT" value has been increased to 32 bytes to prevent
applications from crashing during symbol resolution on 64-bit systems 
with support for Intel AVX vector registers. (BZ#643343)

SL 6.x

      SRPMS:
glibc-2.12-1.7.el6_0.3.src.rpm
      i386:
glibc-2.12-1.7.el6_0.3.i686.rpm
glibc-common-2.12-1.7.el6_0.3.i686.rpm
glibc-devel-2.12-1.7.el6_0.3.i686.rpm
glibc-headers-2.12-1.7.el6_0.3.i686.rpm
glibc-static-2.12-1.7.el6_0.3.i686.rpm
glibc-utils-2.12-1.7.el6_0.3.i686.rpm
nscd-2.12-1.7.el6_0.3.i686.rpm
      x86_64:
glibc-2.12-1.7.el6_0.3.i686.rpm
glibc-2.12-1.7.el6_0.3.x86_64.rpm
glibc-common-2.12-1.7.el6_0.3.x86_64.rpm
glibc-devel-2.12-1.7.el6_0.3.i686.rpm
glibc-devel-2.12-1.7.el6_0.3.x86_64.rpm
glibc-headers-2.12-1.7.el6_0.3.x86_64.rpm
glibc-static-2.12-1.7.el6_0.3.i686.rpm
glibc-static-2.12-1.7.el6_0.3.x86_64.rpm
glibc-utils-2.12-1.7.el6_0.3.x86_64.rpm
nscd-2.12-1.7.el6_0.3.x86_64.rpm

-Connie Sieh
-Troy Dawson

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