Bluetooth: eir: Fix OOB read in eir_get_service_data()
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 6.1.188, 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: Bluetooth: eir: Fix OOB read in eir_get_service_data() eir_get_service_data() walks the advertising data for a Service Data field with a matching UUID. On a mismatch it advances: eir += dlen; eir_len -= dlen; eir_get_data() reports dlen as the field's data length, but the field spans dlen + 2 bytes once its length and type bytes count, and more when non-Service-Data fields were skipped to reach it. The pointer lands correctly on the next field. eir_len does not, and the shortfall compounds across fields until eir_get_data() reads the length and type bytes of a "field" past the end of the buffer. For an ISO broadcast sink that buffer is hcon->le_per_adv_data[], filled from the periodic advertising reports of a remote broadcaster. A PA payload packed with mismatching Service Data fields walks off the array into the rest of struct hci_conn. A drifted field that matches the BAA UUID puts those bytes in iso_pi(sk)->base, where user space reads them back with getsockopt(BT_ISO_BASE). Recompute eir_len from the end of the buffer each iteration.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From 8f9ae5b3ae80f168a6224529e3787f4fb27f299a · fixed in b6902adf81ea2ce14b1040dd97b6980050a8125a; From 8f9ae5b3ae80f168a6224529e3787f4fb27f299a · fixed in 1a28aae7f1fc8c06c0d02f153541be4fc7bacb74; From 8f9ae5b3ae80f168a6224529e3787f4fb27f299a · fixed in 815fc98c227a78cbd93d4c29f2833705b7c2bc0f; From 8f9ae5b3ae80f168a6224529e3787f4fb27f299a · fixed in c21fa79301d7d6ac0a4ec6c51e8ba10beaa08c50; From 8f9ae5b3ae80f168a6224529e3787f4fb27f299a · fixed in bb56e97bd67614238c1c0a4084704ccadbb875b4; From 8f9ae5b3ae80f168a6224529e3787f4fb27f299a · fixed in 4beb198bc59b242404a47c21990bc84165052c8a
- Linux Linux
5.19
- KernelLinux
From 5.19.0 · fixed in 6.1.188; From 6.2.0 · 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