Untrusted search path vulnerability in the Python plugin in Dia 0.96.1, and possibly other versions, allows local users to execute arbitrary code via a Trojan horse Python file in the current working directory, related to a vulnerability in the PySys_SetArgv function (CVE-2008-5983).

Updated python packages that fix multiple security issues, several bugs, and add two enhancements are now available for Red Hat Enterprise Linux 5.

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

Python is an interpreted, interactive, object-oriented programming language.

It was found that many applications embedding the Python interpreter did not specify a valid full path to the script or application when calling the PySys_SetArgv API function, which could result in the addition of the current working directory to the module search path (sys.path). A local attacker able to trick a victim into running such an application in an attacker-controlled directory could use this flaw to execute code with the victim's privileges. This update adds the PySys_SetArgvEx API. Developers can modify their applications to use this new API, which sets sys.argv without modifying sys.path.
(CVE-2008-5983)

Multiple flaws were found in the Python rgbimg module. If an application written in Python was using the rgbimg module and loaded a specially crafted SGI image file, it could cause the application to crash or, possibly, execute arbitrary code with the privileges of the user running the application. (CVE-2009-4134, CVE-2010-1449, CVE-2010-1450)

Multiple flaws were found in the Python audioop module. Supplying certain inputs could cause the audioop module to crash or, possibly, execute arbitrary code. (CVE-2010-1634, CVE-2010-2089)

This update also fixes the following bugs :

* When starting a child process from the subprocess module in Python 2.4, the parent process could leak file descriptors if an error occurred. This update resolves the issue. (BZ#609017)

* Prior to Python 2.7, programs that used 'ulimit -n' to enable communication with large numbers of subprocesses could still monitor only 1024 file descriptors at a time, which caused an exception :

ValueError: filedescriptor out of range in select()

This was due to the subprocess module using the 'select' system call.
The module now uses the 'poll' system call, removing this limitation.
(BZ#609020)

* Prior to Python 2.5, the tarfile module failed to unpack tar files if the path was longer than 100 characters. This update backports the tarfile module from Python 2.5 and the issue no longer occurs.
(BZ#263401)

* The email module incorrectly implemented the logic for obtaining attachment file names: the get_filename() fallback for using the deprecated 'name' parameter of the 'Content-Type' header erroneously used the 'Content-Disposition' header. This update backports a fix from Python 2.6, which resolves this issue. (BZ#644147)

* Prior to version 2.5, Python's optimized memory allocator never released memory back to the system. The memory usage of a long-running Python process would resemble a 'high-water mark'. This update backports a fix from Python 2.5a1, which frees unused arenas, and adds a non-standard sys._debugmallocstats() function, which prints diagnostic information to stderr. Finally, when running under Valgrind, the optimized allocator is deactivated, to allow more convenient debugging of Python memory usage issues. (BZ#569093)

* The urllib and urllib2 modules ignored the no_proxy variable, which could lead to programs such as 'yum' erroneously accessing a proxy server for URLs covered by a 'no_proxy' exclusion. This update backports fixes of urllib and urllib2, which respect the 'no_proxy' variable, which fixes these issues. (BZ#549372)

As well, this update adds the following enhancements :

* This update introduces a new python-libs package, subsuming the majority of the content of the core python package. This makes both 32-bit and 64-bit Python libraries available on PowerPC systems.
(BZ#625372)

* The python-libs.i386 package is now available for 64-bit Itanium with the 32-bit Itanium compatibility mode. (BZ#644761)

All Python users are advised to upgrade to these updated packages, which contain backported patches to correct these issues and add these enhancements.

Python has a variable called sys.path that contains all paths where Python loads modules by using import scripting procedure. A wrong handling of that variable enables local attackers to execute arbitrary code via Python scripting in the current dia working directory (CVE-2008-5984).

This update provides fix for that vulnerability.

Update :

Packages for 2008.0 are provided for Corporate Desktop 2008.0 customers

Python has a variable called sys.path that contains all paths where Python loads modules by using import scripting procedure. A wrong handling of that variable enables local attackers to execute arbitrary code via Python scripting in the current dia working directory (CVE-2008-5984).

This update provides fix for that vulnerability.

Security Focus reports :

An attacker could exploit this issue by enticing an unsuspecting victim to execute the vulnerable application in a directory containing a malicious Python file. A successful exploit will allow arbitrary Python commands to run within the privileges of the currently logged-in user.

Filter out untrusted python modules search path to remove the possibility to run arbitrary code on the user's system if there is a python file in dia's working directory named the same as one that dia's python scripts try to import.

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.

ID	Name	Product	Family	Severity
51524	RHEL 5 : python (RHSA-2011:0027)	Nessus	Red Hat Local Security Checks	high
43074	Mandriva Linux Security Advisory : dia (MDVSA-2009:046-1)	Nessus	Mandriva Local Security Checks	medium
37600	Mandriva Linux Security Advisory : dia (MDVSA-2009:040)	Nessus	Mandriva Local Security Checks	medium
35701	FreeBSD : dia -- remote command execution vulnerability (25eb365c-fd11-11dd-8424-c213de35965d)	Nessus	FreeBSD Local Security Checks	medium
35466	Fedora 9 : dia-0.96.1-7.fc9 (2009-1057)	Nessus	Fedora Local Security Checks	medium

Detections

Analytics

CVE-2008-5984

high

Tenable Plugins

high

medium

medium

medium

medium