Description
In the Linux kernel, the following vulnerability has been resolved: tls: handle data disappearing from under the TLS ULP TLS expects that it owns the receive queue of the TCP socket. This cannot be guaranteed in case the reader of the TCP socket entered before the TLS ULP was installed, or uses some non-standard read API (eg. zerocopy ones). Replace the WARN_ON() and a buggy early exit (which leaves anchor pointing to a freed skb) with real error handling. Wipe the parsing state and tell the reader to retry. We already reload the anchor every time we (re)acquire the socket lock, so the only condition we need to avoid is an out of bounds read (not having enough bytes in the socket for previously parsed record len). If some data was read from under TLS but there's enough in the queue we'll reload and decrypt what is most likely not a valid TLS record. Leading to some undefined behavior from TLS perspective (corrupting a stream? missing an alert? missing an attack?) but no kernel crash should take place.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
84c61fe1a75b4255df1e1e7c054c9e6d048da417 to < ef50eaab631f9bf519ddbdfa42ccb0528adc1fc8affected84c61fe1a75b4255df1e1e7c054c9e6d048da417 to < f1fe99919f629f980d0b8a7ff16950bffe06a859affected84c61fe1a75b4255df1e1e7c054c9e6d048da417 to < eb0336f213fe88bbdb7d2b19c9c9ec19245a3155affected84c61fe1a75b4255df1e1e7c054c9e6d048da417 to < db3658a12d5ec4db7185ae7476151a50521b7207affected84c61fe1a75b4255df1e1e7c054c9e6d048da417 to < 2fb97ed9e2672b4f6e24ce206ac1a875ce4bcb38affected84c61fe1a75b4255df1e1e7c054c9e6d048da417 to < 6db015fc4b5d5f63a64a193f65d98da3a7fc811daffected
Linux Linux
Default version status: affected
6.0affected0 to < 6.0unaffected6.1.185 to ≤ 6.1.*unaffected6.6.103 to ≤ 6.6.*unaffected6.12.43 to ≤ 6.12.*unaffected6.15.11 to ≤ 6.15.*unaffected6.16.2 to ≤ 6.16.*unaffected6.17 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/ef50eaab631f9bf519ddbdfa42ccb0528adc1fc8 ↗
- https://git.kernel.org/stable/c/f1fe99919f629f980d0b8a7ff16950bffe06a859 ↗
- https://git.kernel.org/stable/c/eb0336f213fe88bbdb7d2b19c9c9ec19245a3155 ↗
- https://git.kernel.org/stable/c/db3658a12d5ec4db7185ae7476151a50521b7207 ↗
- https://git.kernel.org/stable/c/2fb97ed9e2672b4f6e24ce206ac1a875ce4bcb38 ↗
- https://git.kernel.org/stable/c/6db015fc4b5d5f63a64a193f65d98da3a7fc811d ↗