Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc before 9ded62c302c0342efdb5eda3bf6e75720caad0df; affected 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc before f101271fcf55d7eacfefd610b51ec65f46ba8118; affected 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc before 4b2738b93edad661178340239de657d876b73d3d; affected 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc before 927e4bd5692f2a4901808822981fb2c8d4456548; affected 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc before 016bc663657366d386993f63eb31072eb45a2b77; affected 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc before 8f2be7285941a33a9f72579a23b96392f83c758e; affected 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc before 5199c125d25aeae8615c4fc31652cc0fe624338e |
| Linux / Linux | affected 2.6.34; unaffected 0 before 2.6.34; unaffected 5.15.209 through 5.15.*; unaffected 6.1.175 through 6.1.*; unaffected 6.6.140 through 6.6.*; unaffected 6.12.86 through 6.12.*; unaffected 6.18.27 through 6.18.*; unaffected 7.0.4 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
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
ADP enrichment
No English description supplied.
No references supplied.