Security Advisory SA40335 - python-cjson Unicode Character Encoding Buffer Overflow Vulnerability

Secunia

Blog

Secunia Advisory SA40335

python-cjson Unicode Character Encoding Buffer Overflow Vulnerability

Secunia Advisory

SA40335

Release Date

2010-07-01

Popularity

2,893 views

Comments

1 comment

Criticality level

Moderately critical

Impact

DoS
System access

Where

From remote

Authentication level

This information is available to Secunia VIM customers

Report reliability

This information is available to Secunia VIM customers

Solution Status

Unpatched

Systems affected

This information is available to Secunia VIM customers

Approve distribution

This information is available to Secunia VIM customers

Remediation status

Secunia VIM

Software:

python-cjson 1.x

Secunia CVSS Score

This information is available to Secunia VIM Customers

CVE Reference(s)

CVE-2010-1666 CVSS score available to Secunia VIM customers

Description

A vulnerability has been reported in python-cjson, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially compromise an application using the module.

The vulnerability is caused due to a boundary error when encoding certain wide unicode character sequences. This can be exploited to cause a buffer overflow by e.g. tricking an application into encoding specially crafted wide unicode strings.

The vulnerability is reported in version 1.0.5 on UCS4 builds. Other versions may also be affected.

Solution
Use another module.

Provided and/or discovered by
Matt Giuca

Original Advisory
https://bugs.launchpad.net/ubuntu/+source/python-cjson/+bug/585274

Deep Links
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: python-cjson Unicode Character Encoding Buffer Overflow Vulnerability

User

Message

mgiuca

RE: python-cjson Unicode Character Encoding Buffer Overflow Vulnerability

13th Aug, 2010 03:47

Score: 5
Posts: 1
User Since: 13th Aug 2010
System Score: N/A
Location: AU
Last edited on 13th Aug, 2010 03:47

I originally reported this bug (on Launchpad) and submitted a patch, which was accepted at least in Debian and Ubuntu awhile back. On those platforms, this module is patched automatically.

This advisory says "unpatched" with the solution being to "use another module". However, there is a patch available at:
http://launchpadlibrarian.net/49116913/encode-hard...

Was this reply relevant?

-0

Secunia Advisory SA40335

python-cjson Unicode Character Encoding Buffer Overflow Vulnerability

Do you have additional information related to this advisory?

You must be logged in to post a comment.

Secunia Customer Login

Not a customer already?