[RHSA-2013:0522-02] Moderate: gdb security and bug fix update

[news 28]

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Red Hat Security Advisory

 

Synopsis: Moderate: gdb security and bug fix update

Advisory ID: RHSA-2013:0522-02

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-0522.html

Issue date: 2013-02-21

CVE Names: CVE-2011-4355

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1. Summary:

 

Updated gdb packages that fix one security issue and three bugs are now

available for Red Hat Enterprise Linux 6.

 

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

security impact. A Common Vulnerability Scoring System (CVSS) base score,

which gives a detailed severity rating, is available from the CVE link in

the References section.

 

2. Relevant releases/architectures:

 

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

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

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

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

 

3. Description:

 

The GNU Debugger (GDB) allows debugging of programs written in C, C++,

Java, and other languages by executing them in a controlled fashion and

then printing out their data.

 

GDB tried to auto-load certain files (such as GDB scripts, Python scripts,

and a thread debugging library) from the current working directory when

debugging programs. This could result in the execution of arbitrary code

with the user's privileges when GDB was run in a directory that has

untrusted content. (CVE-2011-4355)

 

With this update, GDB no longer auto-loads files from the current directory

and only trusts certain system directories by default. The list of trusted

directories can be viewed and modified using the "show auto-load safe-path"

and "set auto-load safe-path" GDB commands. Refer to the GDB manual, linked

to in the References, for further information.

 

This update also fixes the following bugs:

 

* When a struct member was at an offset greater than 256 MB, the resulting

bit position within the struct overflowed and caused an invalid memory

access by GDB. With this update, the code has been modified to ensure that

GDB can access such positions. (BZ#795424)

 

* When a thread list of the core file became corrupted, GDB did not print

this list but displayed the "Cannot find new threads: generic error" error

message instead. With this update, GDB has been modified and it now prints

the thread list of the core file as expected. (BZ#811648)

 

* GDB did not properly handle debugging of multiple binaries with the

same build ID. This update modifies GDB to use symbolic links created for

particular binaries so that debugging of binaries that share a build ID

now proceeds as expected. Debugging of live programs and core files is

now more user-friendly. (BZ#836966)

 

All users of gdb are advised to upgrade to these updated packages, which

contain backported patches to correct these issues.

 

4. 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

 

5. Bugs fixed (http://bugzilla.redhat.com/):

 

703238 - CVE-2011-4355 gdb: object file .debug_gdb_scripts section improper input validation

811648 - Cannot find new threads: generic error

836966 - Backport gdb fix to handle identical binaries via additional build-id symlinks

 

6. Package List:

 

Red Hat Enterprise Linux Desktop (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/gdb-7.2-60.el6.src.rpm

 

i386:

gdb-7.2-60.el6.i686.rpm

gdb-debuginfo-7.2-60.el6.i686.rpm

gdb-gdbserver-7.2-60.el6.i686.rpm

 

x86_64:

gdb-7.2-60.el6.x86_64.rpm

gdb-debuginfo-7.2-60.el6.x86_64.rpm

gdb-gdbserver-7.2-60.el6.x86_64.rpm

 

Red Hat Enterprise Linux HPC Node (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/gdb-7.2-60.el6.src.rpm

 

x86_64:

gdb-7.2-60.el6.x86_64.rpm

gdb-debuginfo-7.2-60.el6.x86_64.rpm

gdb-gdbserver-7.2-60.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/gdb-7.2-60.el6.src.rpm

 

i386:

gdb-7.2-60.el6.i686.rpm

gdb-debuginfo-7.2-60.el6.i686.rpm

gdb-gdbserver-7.2-60.el6.i686.rpm

 

ppc64:

gdb-7.2-60.el6.ppc64.rpm

gdb-debuginfo-7.2-60.el6.ppc64.rpm

gdb-gdbserver-7.2-60.el6.ppc64.rpm

 

s390x:

gdb-7.2-60.el6.s390x.rpm

gdb-debuginfo-7.2-60.el6.s390x.rpm

gdb-gdbserver-7.2-60.el6.s390x.rpm

 

x86_64:

gdb-7.2-60.el6.x86_64.rpm

gdb-debuginfo-7.2-60.el6.x86_64.rpm

gdb-gdbserver-7.2-60.el6.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/gdb-7.2-60.el6.src.rpm

 

i386:

gdb-7.2-60.el6.i686.rpm

gdb-debuginfo-7.2-60.el6.i686.rpm

gdb-gdbserver-7.2-60.el6.i686.rpm

 

x86_64:

gdb-7.2-60.el6.x86_64.rpm

gdb-debuginfo-7.2-60.el6.x86_64.rpm

gdb-gdbserver-7.2-60.el6.x86_64.rpm

 

These packages are GPG signed by Red Hat for security. Our key and

details on how to verify the signature are available from

https://access.redhat.com/security/team/key/#package

 

7. References:

 

https://www.redhat.com/security/data/cve/CVE-2011-4355.html

https://access.redhat.com/security/updates/classification/#moderate

http://sourceware.org/gdb/current/onlinedocs/gdb/Auto_002dloading-safe-path.html#Auto_002dloading-safe-path

http://sourceware.org/gdb/current/onlinedocs/gdb/Auto_002dloading.html#Auto_002dloading

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2013 Red Hat, Inc.

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