A weakness and two vulnerabilities have been reported in Tor, which can be exploited by malicious, local users to disclose potentially sensitive information, and by malicious people to cause a DoS (Denial of Service) and potentially compromise a user's system.
1) An unspecified error can be exploited to cause a heap-based memory corruption.
2) An error within the handling of zlib-compressed data can be exploited to cause a DoS by sending specially crafted compressed data.
3) Various functions do not properly clear keys from memory before freeing them, which may lead to the disclosure of the keys.
The weakness and the vulnerabilities are reported in versions prior to 0.2.1.29.
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Subject: Tor Multiple Vulnerabilities
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