5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.16 Low
EPSS
Percentile
95.9%
Issue Overview:
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.
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)
Affected Packages:
python26
Issue Correction:
Run yum update python26 to update your system.
New Packages:
i686:
python26-2.6.8-2.28.amzn1.i686
python26-test-2.6.8-2.28.amzn1.i686
python26-debuginfo-2.6.8-2.28.amzn1.i686
python26-libs-2.6.8-2.28.amzn1.i686
python26-devel-2.6.8-2.28.amzn1.i686
python26-tools-2.6.8-2.28.amzn1.i686
src:
python26-2.6.8-2.28.amzn1.src
x86_64:
python26-devel-2.6.8-2.28.amzn1.x86_64
python26-debuginfo-2.6.8-2.28.amzn1.x86_64
python26-test-2.6.8-2.28.amzn1.x86_64
python26-tools-2.6.8-2.28.amzn1.x86_64
python26-libs-2.6.8-2.28.amzn1.x86_64
python26-2.6.8-2.28.amzn1.x86_64
Red Hat: CVE-2011-4940, CVE-2011-4944, CVE-2012-0845, CVE-2012-1150
Mitre: CVE-2011-4940, CVE-2011-4944, CVE-2012-0845, CVE-2012-1150
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 1 | i686 | python26 | < 2.6.8-2.28.amzn1 | python26-2.6.8-2.28.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | python26-test | < 2.6.8-2.28.amzn1 | python26-test-2.6.8-2.28.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | python26-debuginfo | < 2.6.8-2.28.amzn1 | python26-debuginfo-2.6.8-2.28.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | python26-libs | < 2.6.8-2.28.amzn1 | python26-libs-2.6.8-2.28.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | python26-devel | < 2.6.8-2.28.amzn1 | python26-devel-2.6.8-2.28.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | python26-tools | < 2.6.8-2.28.amzn1 | python26-tools-2.6.8-2.28.amzn1.i686.rpm |
Amazon Linux | 1 | x86_64 | python26-devel | < 2.6.8-2.28.amzn1 | python26-devel-2.6.8-2.28.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | python26-debuginfo | < 2.6.8-2.28.amzn1 | python26-debuginfo-2.6.8-2.28.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | python26-test | < 2.6.8-2.28.amzn1 | python26-test-2.6.8-2.28.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | python26-tools | < 2.6.8-2.28.amzn1 | python26-tools-2.6.8-2.28.amzn1.x86_64.rpm |