Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: libceph: Reject monmaps advertising zero monitors A message of type CEPH_MSG_MON_MAP contains a monmap that is sent from a monitor to the client. This monmap contains information about the existing monitors in the cluster. Currently, a monmap indicating that there are zero monitors in the cluster is treated as valid. However, it is impossible to have zero monitors in the cluster and still receive a valid monmap from a monitor. Therefore, such a monmap must be corrupted and should be treated as invalid. Furthermore, a monmap with a monitor count of zero can subsequently crash the client when attempting to open a session with a monitor in __open_session(). This happens because the "BUG_ON(monc->monmap->num_mon < 1)" assertion in pick_new_mon() is triggered. This patch extends a check in ceph_monmap_decode() to also reject arriving mon_maps with num_mon == 0 rather than only with num_mon > CEPH_MAX_MON. [ idryomov: drop "log output for unusual values of num_mon" part ]
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ba75bb98cfb93b62c54af25bf67ff90857264bbe before ba5f0015bfd376d764163045a61c17be75f44dae; affected ba75bb98cfb93b62c54af25bf67ff90857264bbe before caf082ef8609a6ac26159ce115f55ab7d00231a3; affected ba75bb98cfb93b62c54af25bf67ff90857264bbe before e3ccd4ecab09b22f507f49cb7ed9990c7158ceab; affected ba75bb98cfb93b62c54af25bf67ff90857264bbe before 0591a15815b498be628a937146e44487d599ba33; affected ba75bb98cfb93b62c54af25bf67ff90857264bbe before cd0d41bc569632eaaeccde9d2a6bc919ec00c407; affected ba75bb98cfb93b62c54af25bf67ff90857264bbe before e67e8b694872c9bc66996040f9de9242f6236ed9; affected ba75bb98cfb93b62c54af25bf67ff90857264bbe before 3b249546f59c3d6d3592c10657f82bc3f1faa07c; affected ba75bb98cfb93b62c54af25bf67ff90857264bbe before 40480eee361ed9676b3f844d532ac28b47251634 |
| Linux / Linux | affected 2.6.34; unaffected 0 before 2.6.34; unaffected 5.10.271 through 5.10.*; unaffected 5.15.216 through 5.15.*; unaffected 6.1.183 through 6.1.*; unaffected 6.6.148 through 6.6.*; unaffected 6.12.101 through 6.12.*; unaffected 6.18.42 through 6.18.*; unaffected 7.1.6 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/ba5f0015bfd376d764163045a61c17be75f44dae
- https://git.kernel.org/stable/c/caf082ef8609a6ac26159ce115f55ab7d00231a3
- https://git.kernel.org/stable/c/e3ccd4ecab09b22f507f49cb7ed9990c7158ceab
- https://git.kernel.org/stable/c/0591a15815b498be628a937146e44487d599ba33
- https://git.kernel.org/stable/c/cd0d41bc569632eaaeccde9d2a6bc919ec00c407
- https://git.kernel.org/stable/c/e67e8b694872c9bc66996040f9de9242f6236ed9
- https://git.kernel.org/stable/c/3b249546f59c3d6d3592c10657f82bc3f1faa07c
- https://git.kernel.org/stable/c/40480eee361ed9676b3f844d532ac28b47251634
ADP enrichment
No English description supplied.
No references supplied.