MGASA-2021-0293

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MGASA-2021-0293

Summary: Updated tor package fixes security vulnerabilities

Details: Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on half-closed streams. Previously, clients failed to validate which hop sent these cells: this would allow a relay on a circuit to end a stream that wasn't actually built with it (CVE-2021-34548). hashtable-based CPU denial-of-service attack against relays (CVE-2021-34549). out-of-bounds memory access in v3 onion service descriptor parsing (CVE-2021-34550). See also upstream release notes for included other bugfixes. This package also fixes an error in tor package's un-install script (mga#29158).

References: https://advisories.mageia.org/MGASA-2021-0293.html, https://bugs.mageia.org/show_bug.cgi?id=29136, https://bugs.mageia.org/show_bug.cgi?id=29158, https://blog.torproject.org/node/2041, https://lists.fedoraproject.org/archives/list/[email protected]/thread/RST7YTNTKJURIR2QVIJMEBXWW2YHETRX/