Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected a1cdd18c49d23ec38097ac2c5b0d761146fc0109 before 26157c82ba756767b2bd66d28a71b1bc454447f6; affected 18013007b596771bf5f5e7feee9586fb0386ad14 before ccddad6dd28530e716448e594c9ca7c76ccd0570; affected 538a6ff11516d38a61e237d2d2dc04c30c845fbe before 18ae4a192a4496e48a5490b52812645d2413307c; affected adbb1d218c5f56dbae052765da83c0f57fce2a31 before 48fba458fe54cc2a980a05c13e6c19b8b2cfb610; affected c89903c9eff219a4695e63715cf922748d743f65 before e32352070bcac22be6ed8ab635debc280bb65b8c; affected 6fb003e5ae18d8cda4c8a1175d9dd8db12bec049 before 6b7021ed36dabf29e56842e3408781cd3b82ef6e; affected 8c9e4971e142e2899606a2490b77a1208c1f4638 before 374cdde4dcc9c909a60713abdbbf96d5e3e09f91; affected c33b1cc62ac05c1dbb1cdafe2eb66da01c76ca8d before 18175fe17ae043a0b81e5d511f8817825784c299; affected c33b1cc62ac05c1dbb1cdafe2eb66da01c76ca8d before c61760e6940dd4039a7f5e84a6afc9cdbf4d82b6; affected 4.4.267 before 4.4.269; affected 4.9.267 before 4.9.269; affected 4.14.231 before 4.14.233; affected 4.19.187 before 4.19.191; affected 5.4.112 before 5.4.119; affected 5.10.30 before 5.10.37; affected 5.11.14 before 5.11.21 |
| Linux / Linux | affected 5.12; unaffected 0 before 5.12; unaffected 4.4.269 through 4.4.*; unaffected 4.9.269 through 4.9.*; unaffected 4.14.233 through 4.14.*; unaffected 4.19.191 through 4.19.*; unaffected 5.4.119 through 5.4.*; unaffected 5.10.37 through 5.10.*; unaffected 5.11.21 through 5.11.*; unaffected 5.12.4 through 5.12.*; unaffected 5.13 through * |
CWE
No CWE identifiers supplied.
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
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.
- 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