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.

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.

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.

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.

  - 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.

  - 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.

Update 'set auto-load' patchset and the --with-auto-load-safe-path setting.

Security fix for loading untrusted inferiors, see 'set auto-load'.

Security fix for loading untrusted inferiors, see 'set auto-load'.

Workaround crashes from stale frame_info pointer (BZ 804256).

Security fix for loading untrusted inferiors, see 'set auto-load' (BZ 756117).

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

From Red Hat Security Advisory 2013:0522 :

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.

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.

ID	Name	Product	Family	Published	Updated	Severity
65153	CentOS 6 : gdb (CESA-2013:0522)	Nessus	CentOS Local Security Checks	3/10/2013	1/4/2021	medium
69718	Amazon Linux AMI : gdb (ALAS-2013-159)	Nessus	Amazon Linux Local Security Checks	9/4/2013	4/18/2018	medium
64951	Scientific Linux Security Update : gdb on SL6.x i386/x86_64 (20130221)	Nessus	Scientific Linux Local Security Checks	3/1/2013	1/14/2021	medium
58999	Fedora 17 : gdb-7.4.50.20120120-42.fc17 (2012-6635)	Nessus	Fedora Local Security Checks	5/7/2012	1/11/2021	medium
61585	Fedora 16 : gdb-7.3.50.20110722-16.fc16 (2012-6614)	Nessus	Fedora Local Security Checks	8/20/2012	1/11/2021	medium
64769	RHEL 6 : gdb (RHSA-2013:0522)	Nessus	Red Hat Local Security Checks	2/21/2013	1/14/2021	medium
68758	Oracle Linux 6 : gdb (ELSA-2013-0522)	Nessus	Oracle Linux Local Security Checks	7/12/2013	1/14/2021	medium

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