libceph: validate OSD extent maps before cursor advance
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.6.157, 6.12.109, 6.18.50, 7.2.4
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In the Linux kernel, the following vulnerability has been resolved: libceph: validate OSD extent maps before cursor advance net/ceph/osd_client.c:osd_sparse_read() validates that the sparse-read data length matches the summed extent lengths, but it does not validate that each OSD-supplied extent is monotonic and lies inside the original request range. A malformed authenticated OSD reply can advertise a far-forward nonzero extent offset with a matching data length and make the client advance the message-data cursor beyond the request buffer. This reaches the BUG_ON(!*length) assertion in ceph_msg_data_next() from the client receive path. Impact: A malicious or compromised authenticated Ceph OSD peer can crash a kernel Ceph client via a malformed sparse-read reply. Reject sparse extent maps that overflow, move backwards, overlap, or extend outside the original sparse-read request before advancing the cursor. [ idryomov: perform sparse_extent_map_valid() check a bit earlier, in CEPH_SPARSE_READ_DATA_LEN instead of CEPH_SPARSE_READ_DATA_PRE state ]
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From f628d799972799023d32c2542bb2639eb8c4f84e · fixed in 94ae5145c520618802b0a24c047dcd5f05835db8; From f628d799972799023d32c2542bb2639eb8c4f84e · fixed in 058ffa81f9440c5b4714685611cf697fd3739ec9; From f628d799972799023d32c2542bb2639eb8c4f84e · fixed in 2571b35883268a266554e80d368e67fdfea7fb9d; From f628d799972799023d32c2542bb2639eb8c4f84e · fixed in 201db408872ca12cf09e36bf0f560138c3dcfa1c; From f628d799972799023d32c2542bb2639eb8c4f84e · fixed in 9ec08b7499a62c6d4afa93d36ab47a43fcad57d1
- Linux Linux
6.6
- KernelLinux
From 6.6.0 · fixed in 6.6.157; From 6.7.0 · fixed in 6.12.109; From 6.13.0 · fixed in 6.18.50; From 6.19.0 · fixed in 7.2.4