Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: libceph: bound pg_{temp,upmap,upmap_items} length to CEPH_PG_MAX_SIZE __decode_pg_temp() decodes an user-controlled length but only rejects values large enough to overflow the allocation; it does not bound it to CEPH_PG_MAX_SIZE. The helper backs both pg_temp and pg_upmap decoding, and apply_upmap()/get_temp_osds() later copy the decoded list into the fixed-size on-stack array struct ceph_osds.osds[CEPH_PG_MAX_SIZE]. A monitor that sends an OSDMap with a pg_temp/pg_upmap entry longer than 32 thus causes a stack out-of-bounds write. An OSD set for a single PG can never exceed CEPH_PG_MAX_SIZE, so reject longer entries at decode time. The bound is well below the old overflow threshold, so it also covers the allocation-size overflow the previous check guarded against. BUG: KASAN: stack-out-of-bounds in ceph_pg_to_up_acting_osds Write of size 4 ... by task exploit kasan_report (mm/kasan/report.c:595) ceph_pg_to_up_acting_osds (net/ceph/osdmap.c:2617 net/ceph/osdmap.c:2833) calc_target (net/ceph/osd_client.c:1638) __submit_request (net/ceph/osd_client.c:2394) ceph_osdc_start_request (net/ceph/osd_client.c:2490) ceph_osdc_call (net/ceph/osd_client.c:5164) rbd_dev_image_probe (drivers/block/rbd.c:6899) do_rbd_add (drivers/block/rbd.c:7138) ... kernel BUG at net/ceph/osdmap.c:2670! [ idryomov: do the same in __decode_pg_upmap_items() ]
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected a303bb0e58345fe9f7ab2f82b90266f2b5036058 before 66eec4af1e080b695229c9a20635648a6d12fedf; affected a303bb0e58345fe9f7ab2f82b90266f2b5036058 before 4daf06456677177f2a6044729abac59c1b49e87b; affected a303bb0e58345fe9f7ab2f82b90266f2b5036058 before d5650ddbd4d42c1a916c8fe1a4c4cb573ef810a1; affected a303bb0e58345fe9f7ab2f82b90266f2b5036058 before 42bc06c67d94d5f2a6b33294b0c4b07d8a47c515; affected a303bb0e58345fe9f7ab2f82b90266f2b5036058 before ebdf4b4f3b1474079980a2e5cd79ad65fb54db57; affected a303bb0e58345fe9f7ab2f82b90266f2b5036058 before 590b07ceea138d49c9b64f65d263aa902d3b4730; affected a303bb0e58345fe9f7ab2f82b90266f2b5036058 before e36663145abd7024f0281dfb22fdef65f185845b; affected a303bb0e58345fe9f7ab2f82b90266f2b5036058 before 9f00f9cf2be293efe899db67dc5272e3a9c62717 |
| Linux / Linux | affected 4.13; unaffected 0 before 4.13; unaffected 5.10.266 through 5.10.*; unaffected 5.15.217 through 5.15.*; unaffected 6.1.184 through 6.1.*; unaffected 6.6.153 through 6.6.*; unaffected 6.12.105 through 6.12.*; unaffected 6.18.46 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/66eec4af1e080b695229c9a20635648a6d12fedf
- https://git.kernel.org/stable/c/4daf06456677177f2a6044729abac59c1b49e87b
- https://git.kernel.org/stable/c/d5650ddbd4d42c1a916c8fe1a4c4cb573ef810a1
- https://git.kernel.org/stable/c/42bc06c67d94d5f2a6b33294b0c4b07d8a47c515
- https://git.kernel.org/stable/c/ebdf4b4f3b1474079980a2e5cd79ad65fb54db57
- https://git.kernel.org/stable/c/590b07ceea138d49c9b64f65d263aa902d3b4730
- https://git.kernel.org/stable/c/e36663145abd7024f0281dfb22fdef65f185845b
- https://git.kernel.org/stable/c/9f00f9cf2be293efe899db67dc5272e3a9c62717
ADP enrichment
No English description supplied.
No references supplied.