KLA10932
Multiple vulnerabilities in Pidgin

Multiple serious vulnerabilities have been found in Pidgin. Malicious users can exploit these vulnerabilities to overwrite arbitrary files, cause denial of service, obtain sensitive information.

Below is a complete list of vulnerabilities:

1. A directory traversal vulnerability in the handling of MXIT protocol can be exploited remotely via specially designed MXIT data sent from the server to overwrite arbitrary files;
2. An out-of-bounds read vulnerability can be exploited remotely via specialy designed MXIT data (a particular string) possibly to obtain sensitive information;
3. A buffer overflow vulnerability in the handling of MXIT protocol can be exploited remotely via specially designed data possibly to cause a denial of service.

Technical details

Vulnerability (1) occurs if liburple is triggered by man-in-the-middle or a malicious server to overwrite local files. The name and and content of these files can be specified by the remote attacker.

To trigger vulnerability (3) a malicious server or man-in-the-middle can send negative length values.

Pidgin versions earlier than 2.11.0

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