net/nfc: fix use-after-free llcp_sock_bind/connect (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.23 % · percentile 14 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
In the Linux kernel, the following vulnerability has been resolved: net/nfc: fix use-after-free llcp_sock_bind/connect Commits 8a4cd82d ("nfc: fix refcount leak in llcp_sock_connect()") and c33b1cc62 ("nfc: fix refcount leak in llcp_sock_bind()") fixed a refcount leak bug in bind/connect but introduced a use-after-free if the same local is assigned to 2 different sockets. This can be triggered by the following simple program: int sock1 = socket( AF_NFC, SOCK_STREAM, NFC_SOCKPROTO_LLCP ); int sock2 = socket( AF_NFC, SOCK_STREAM, NFC_SOCKPROTO_LLCP ); memset( &addr, 0, sizeof(struct sockaddr_nfc_llcp) ); addr.sa_family = AF_NFC; addr.nfc_protocol = NFC_PROTO_NFC_DEP; bind( sock1, (struct sockaddr*) &addr, sizeof(struct sockaddr_nfc_llcp) ) bind( sock2, (struct sockaddr*) &addr, sizeof(struct sockaddr_nfc_llcp) ) close(sock1); close(sock2); Fix this by assigning NULL to llcp_sock->local after calling nfc_llcp_local_put. This addresses CVE-2021-23134.
Weaknesses (CWE)
- CWE-416 — Use After Free
References
- https://git.kernel.org/stable/c/26157c82ba756767b2bd66d28a71b1bc454447f6
- https://git.kernel.org/stable/c/ccddad6dd28530e716448e594c9ca7c76ccd0570
- https://git.kernel.org/stable/c/18ae4a192a4496e48a5490b52812645d2413307c
- https://git.kernel.org/stable/c/48fba458fe54cc2a980a05c13e6c19b8b2cfb610
- https://git.kernel.org/stable/c/e32352070bcac22be6ed8ab635debc280bb65b8c
- https://git.kernel.org/stable/c/6b7021ed36dabf29e56842e3408781cd3b82ef6e
- https://git.kernel.org/stable/c/374cdde4dcc9c909a60713abdbbf96d5e3e09f91
- https://git.kernel.org/stable/c/18175fe17ae043a0b81e5d511f8817825784c299
- https://git.kernel.org/stable/c/c61760e6940dd4039a7f5e84a6afc9cdbf4d82b6
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | Linux |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | CISA-ADP |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
European references
- ENISA EUVD · EUVD-2021-33716
- GCVE · GCVE-0-2021-47068
CERT-FR advisories
- CERTFR-2024-AVI-0458 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0440 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0420 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0363 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.4.267 < 4.4.269cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.9.267 < 4.9.269cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.14.231 < 4.14.233cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.19.187 < 4.19.191cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.4.112 < 5.4.119cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.10.30 < 5.10.37cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11.14 < 5.11.21cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.12 < 5.12.4
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected a1cdd18c49d23ec38097ac2c5b0d761146fc0109 < 26157c82ba756767b2bd66d28a71b1bc454447f6 ; affected 18013007b596771bf5f5e7feee9586fb0386ad14 < ccddad6dd28530e716448e594c9ca7c76ccd0570 ; affected 538a6ff11516d38a61e237d2d2dc04c30c845fbe < 18ae4a192a4496e48a5490b52812645d2413307c ; affected adbb1d218c5f56dbae052765da83c0f57fce2a31 < 48fba458fe54cc2a980a05c13e6c19b8b2cfb610 ; affected c89903c9eff219a4695e63715cf922748d743f65 < e32352070bcac22be6ed8ab635debc280bb65b8c ; affected 6fb003e5ae18d8cda4c8a1175d9dd8db12bec049 < 6b7021ed36dabf29e56842e3408781cd3b82ef6e |
| Linux · Linux | affected 5.12 ; unaffected 0 < 5.12 ; unaffected 4.4.269 ≤ 4.4.* ; unaffected 4.9.269 ≤ 4.9.* ; unaffected 4.14.233 ≤ 4.14.* ; unaffected 4.19.191 ≤ 4.19.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |