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Scientific Linux Security Update : python on SL6.x i386/x86_64 (20120618)
medium Nessus Plugin ID 61333
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Synopsis
The remote Scientific Linux host is missing one or more security updates.Description
Python is an interpreted, interactive, object-oriented programming language.A denial of service flaw was found in the implementation of associative arrays (dictionaries) in Python. An attacker able to supply a large number of inputs to a Python application (such as HTTP POST request parameters sent to a web application) that are used as keys when inserting data into an array could trigger multiple hash function collisions, making array operations take an excessive amount of CPU time. To mitigate this issue, randomization has been added to the hash function to reduce the chance of an attacker successfully causing intentional collisions. (CVE-2012-1150)
Note: The hash randomization is not enabled by default as it may break applications that incorrectly depend on dictionary ordering. To enable the protection, the new 'PYTHONHASHSEED' environment variable or the Python interpreter's '-R' command line option can be used. Refer to the python(1) manual page for details.
The previous expat erratum must be installed with this update, which adds hash randomization to the Expat library used by the Python pyexpat module.
A flaw was found in the way the Python SimpleXMLRPCServer module handled clients disconnecting prematurely. A remote attacker could use this flaw to cause excessive CPU consumption on a server using SimpleXMLRPCServer. (CVE-2012-0845)
A flaw was found in the way the Python SimpleHTTPServer module generated directory listings. An attacker able to upload a file with a specially crafted name to a server could possibly perform a cross-site scripting (XSS) attack against victims visiting a listing page generated by SimpleHTTPServer, for a directory containing the crafted file (if the victims were using certain web browsers). (CVE-2011-4940)
A race condition was found in the way the Python distutils module set file permissions during the creation of the .pypirc file. If a local user had access to the home directory of another user who is running distutils, they could use this flaw to gain access to that user's .pypirc file, which can contain usernames and passwords for code repositories. (CVE-2011-4944)
All Python users should upgrade to these updated packages, which contain backported patches to correct these issues.
Solution
Update the affected packages.See Also
Plugin Details
Severity: Medium
ID: 61333
File Name: sl_20120618_python_on_SL6_x.nasl
Version: 1.8
Type: local
Agent: unix
Published: 8/1/2012
Updated: 1/14/2021
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.7
CVSS v2
Risk Factor: Medium
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
Vulnerability Information
CPE: p-cpe:/a:fermilab:scientific_linux:python, p-cpe:/a:fermilab:scientific_linux:python-debuginfo, p-cpe:/a:fermilab:scientific_linux:python-devel, p-cpe:/a:fermilab:scientific_linux:python-libs, p-cpe:/a:fermilab:scientific_linux:python-test, p-cpe:/a:fermilab:scientific_linux:python-tools, p-cpe:/a:fermilab:scientific_linux:tkinter, x-cpe:/o:fermilab:scientific_linux
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RedHat/release, Host/RedHat/rpm-list
Patch Publication Date: 6/18/2012
Vulnerability Publication Date: 6/27/2012
Reference Information
CVE: CVE-2011-4940, CVE-2011-4944, CVE-2012-0845, CVE-2012-1150