Description
In the Linux kernel, the following vulnerability has been resolved: libceph: Prevent potential null-ptr-deref in ceph_handle_auth_reply() If a message of type CEPH_MSG_AUTH_REPLY contains a zero value for both protocol and result, this is currently not treated as an error. In case of ac->negotiating == true and ac->protocol > 0, this leads to setting ac->protocol = 0 and ac->ops = NULL. Thereafter, the check for ac->protocol != protocol returns false, and init_protocol() is not called. Subsequently, ac->ops->handle_reply() is called, which leads to a null pointer dereference, because ac->ops is still NULL. This patch changes the check for ac->protocol != protocol to !ac->protocol, as this also includes the case when the protocol was set to zero in the message. This causes the message to be treated as containing a bad auth protocol.
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
4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc to < 9ded62c302c0342efdb5eda3bf6e75720caad0dfaffected4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc to < f101271fcf55d7eacfefd610b51ec65f46ba8118affected4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc to < 4b2738b93edad661178340239de657d876b73d3daffected4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc to < 927e4bd5692f2a4901808822981fb2c8d4456548affected4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc to < 016bc663657366d386993f63eb31072eb45a2b77affected4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc to < 8f2be7285941a33a9f72579a23b96392f83c758eaffected4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc to < 5199c125d25aeae8615c4fc31652cc0fe624338eaffected
Linux Linux
Default version status: affected
2.6.34affected0 to < 2.6.34unaffected5.15.209 to ≤ 5.15.*unaffected6.1.175 to ≤ 6.1.*unaffected6.6.140 to ≤ 6.6.*unaffected6.12.86 to ≤ 6.12.*unaffected6.18.27 to ≤ 6.18.*unaffected7.0.4 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/9ded62c302c0342efdb5eda3bf6e75720caad0df ↗
- https://git.kernel.org/stable/c/f101271fcf55d7eacfefd610b51ec65f46ba8118 ↗
- https://git.kernel.org/stable/c/4b2738b93edad661178340239de657d876b73d3d ↗
- https://git.kernel.org/stable/c/927e4bd5692f2a4901808822981fb2c8d4456548 ↗
- https://git.kernel.org/stable/c/016bc663657366d386993f63eb31072eb45a2b77 ↗
- https://git.kernel.org/stable/c/8f2be7285941a33a9f72579a23b96392f83c758e ↗
- https://git.kernel.org/stable/c/5199c125d25aeae8615c4fc31652cc0fe624338e ↗