CVE-2021-47250

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-47250
In the Linux kernel, the following vulnerability has been resolved: net: ipv4: fix memory leak in netlbl_cipsov4_add_std Reported by syzkaller: BUG: memory leak unreferenced object 0xffff888105df7000 (size 64): comm "syz-executor842", pid 360, jiffies 4294824824 (age 22.546s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000e67ed558>] kmalloc include/linux/slab.h:590 [inline] [<00000000e67ed558>] kzalloc include/linux/slab.h:720 [inline] [<00000000e67ed558>] netlbl_cipsov4_add_std net/netlabel/netlabel_cipso_v4.c:145 [inline] [<00000000e67ed558>] netlbl_cipsov4_add+0x390/0x2340 net/netlabel/netlabel_cipso_v4.c:416 [<0000000006040154>] genl_family_rcv_msg_doit.isra.0+0x20e/0x320 net/netlink/genetlink.c:739 [<00000000204d7a1c>] genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] [<00000000204d7a1c>] genl_rcv_msg+0x2bf/0x4f0 net/netlink/genetlink.c:800 [<00000000c0d6a995>] netlink_rcv_skb+0x134/0x3d0 net/netlink/af_netlink.c:2504 [<00000000d78b9d2c>] genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 [<000000009733081b>] netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] [<000000009733081b>] netlink_unicast+0x4a0/0x6a0 net/netlink/af_netlink.c:1340 [<00000000d5fd43b8>] netlink_sendmsg+0x789/0xc70 net/netlink/af_netlink.c:1929 [<000000000a2d1e40>] sock_sendmsg_nosec net/socket.c:654 [inline] [<000000000a2d1e40>] sock_sendmsg+0x139/0x170 net/socket.c:674 [<00000000321d1969>] ____sys_sendmsg+0x658/0x7d0 net/socket.c:2350 [<00000000964e16bc>] ___sys_sendmsg+0xf8/0x170 net/socket.c:2404 [<000000001615e288>] __sys_sendmsg+0xd3/0x190 net/socket.c:2433 [<000000004ee8b6a5>] do_syscall_64+0x37/0x90 arch/x86/entry/common.c:47 [<00000000171c7cee>] entry_SYSCALL_64_after_hwframe+0x44/0xae The memory of doi_def->map.std pointing is allocated in netlbl_cipsov4_add_std, but no place has freed it. It should be freed in cipso_v4_doi_free which frees the cipso DOI resource.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/086e92b1d68c6338535f715aad173f8cf4bfbc8c Patch
https://git.kernel.org/stable/c/0ffb460be3abac86f884a8c548bb02724ec370f4 Patch
https://git.kernel.org/stable/c/212166510582631994be4f4b3fe15e10a03c1dd4 Patch
https://git.kernel.org/stable/c/398a24447eb60f060c8994221cb5ae6caf355fa1 Patch
https://git.kernel.org/stable/c/5340858147e3dc60913fb3dd0cbb758ec4a26e66 Patch
https://git.kernel.org/stable/c/6dcea66d3bb519b426282588f38e884e07893c1f Patch
https://git.kernel.org/stable/c/d612c3f3fae221e7ea736d196581c2217304bbbc Patch
https://git.kernel.org/stable/c/deeeb65c6ee404f2d1fb80b38b2730645c0f4663 Patch
https://git.kernel.org/stable/c/086e92b1d68c6338535f715aad173f8cf4bfbc8c Patch
https://git.kernel.org/stable/c/0ffb460be3abac86f884a8c548bb02724ec370f4 Patch
https://git.kernel.org/stable/c/212166510582631994be4f4b3fe15e10a03c1dd4 Patch
https://git.kernel.org/stable/c/398a24447eb60f060c8994221cb5ae6caf355fa1 Patch
https://git.kernel.org/stable/c/5340858147e3dc60913fb3dd0cbb758ec4a26e66 Patch
https://git.kernel.org/stable/c/6dcea66d3bb519b426282588f38e884e07893c1f Patch
https://git.kernel.org/stable/c/d612c3f3fae221e7ea736d196581c2217304bbbc Patch
https://git.kernel.org/stable/c/deeeb65c6ee404f2d1fb80b38b2730645c0f4663 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc6:*:*:*:*:*:*
History

30 Dec 2024, 19:00

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/086e92b1d68c6338535f715aad173f8cf4bfbc8c - () https://git.kernel.org/stable/c/086e92b1d68c6338535f715aad173f8cf4bfbc8c - Patch
References () https://git.kernel.org/stable/c/0ffb460be3abac86f884a8c548bb02724ec370f4 - () https://git.kernel.org/stable/c/0ffb460be3abac86f884a8c548bb02724ec370f4 - Patch
References () https://git.kernel.org/stable/c/212166510582631994be4f4b3fe15e10a03c1dd4 - () https://git.kernel.org/stable/c/212166510582631994be4f4b3fe15e10a03c1dd4 - Patch
References () https://git.kernel.org/stable/c/398a24447eb60f060c8994221cb5ae6caf355fa1 - () https://git.kernel.org/stable/c/398a24447eb60f060c8994221cb5ae6caf355fa1 - Patch
References () https://git.kernel.org/stable/c/5340858147e3dc60913fb3dd0cbb758ec4a26e66 - () https://git.kernel.org/stable/c/5340858147e3dc60913fb3dd0cbb758ec4a26e66 - Patch
References () https://git.kernel.org/stable/c/6dcea66d3bb519b426282588f38e884e07893c1f - () https://git.kernel.org/stable/c/6dcea66d3bb519b426282588f38e884e07893c1f - Patch
References () https://git.kernel.org/stable/c/d612c3f3fae221e7ea736d196581c2217304bbbc - () https://git.kernel.org/stable/c/d612c3f3fae221e7ea736d196581c2217304bbbc - Patch
References () https://git.kernel.org/stable/c/deeeb65c6ee404f2d1fb80b38b2730645c0f4663 - () https://git.kernel.org/stable/c/deeeb65c6ee404f2d1fb80b38b2730645c0f4663 - Patch
First Time Linux
Linux linux Kernel
CPE cpe:2.3:o:linux:linux_kernel:5.13:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc4:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CWE CWE-401

21 Nov 2024, 06:35

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/086e92b1d68c6338535f715aad173f8cf4bfbc8c - () https://git.kernel.org/stable/c/086e92b1d68c6338535f715aad173f8cf4bfbc8c -
References () https://git.kernel.org/stable/c/0ffb460be3abac86f884a8c548bb02724ec370f4 - () https://git.kernel.org/stable/c/0ffb460be3abac86f884a8c548bb02724ec370f4 -
References () https://git.kernel.org/stable/c/212166510582631994be4f4b3fe15e10a03c1dd4 - () https://git.kernel.org/stable/c/212166510582631994be4f4b3fe15e10a03c1dd4 -
References () https://git.kernel.org/stable/c/398a24447eb60f060c8994221cb5ae6caf355fa1 - () https://git.kernel.org/stable/c/398a24447eb60f060c8994221cb5ae6caf355fa1 -
References () https://git.kernel.org/stable/c/5340858147e3dc60913fb3dd0cbb758ec4a26e66 - () https://git.kernel.org/stable/c/5340858147e3dc60913fb3dd0cbb758ec4a26e66 -
References () https://git.kernel.org/stable/c/6dcea66d3bb519b426282588f38e884e07893c1f - () https://git.kernel.org/stable/c/6dcea66d3bb519b426282588f38e884e07893c1f -
References () https://git.kernel.org/stable/c/d612c3f3fae221e7ea736d196581c2217304bbbc - () https://git.kernel.org/stable/c/d612c3f3fae221e7ea736d196581c2217304bbbc -
References () https://git.kernel.org/stable/c/deeeb65c6ee404f2d1fb80b38b2730645c0f4663 - () https://git.kernel.org/stable/c/deeeb65c6ee404f2d1fb80b38b2730645c0f4663 -
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: ipv4: corrige la pérdida de memoria en netlbl_cipsov4_add_std. Reportado por syzkaller: BUG: pérdida de memoria objeto sin referencia 0xffff888105df7000 (tamaño 64): comm "syz-executor842", pid 360, jiffies 4294824824 ( edad 22,546 s) volcado hexadecimal (primeros 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [&lt;00000000e67ed558&gt;] kmalloc include/linux/slab.h:590 [en línea] [&lt;00000000e67ed558&gt; ] kzalloc include/linux/slab.h:720 [en línea] [&lt;00000000e67ed558&gt;] netlbl_cipsov4_add_std net/netlabel/netlabel_cipso_v4.c:145 [en línea] [&lt;00000000e67ed558&gt;] netlbl_cipsov4_add+0x390/0x234 0 net/netlabel/netlabel_cipso_v4.c: 416 [&lt;0000000006040154&gt;] genl_family_rcv_msg_doit.isra.0+0x20e/0x320 net/netlink/genetlink.c:739 [&lt;00000000204d7a1c&gt;] genl_family_rcv_msg net/netlink/genetlink.c:783 [en línea] 00000204d7a1c&gt;] genl_rcv_msg+0x2bf /0x4f0 net/netlink/genetlink.c:800 [&lt;00000000c0d6a995&gt;] netlink_rcv_skb+0x134/0x3d0 net/netlink/af_netlink.c:2504 [&lt;00000000d78b9d2c&gt;] genl_rcv+0x24/0x40 11 [ &lt;000000009733081b&gt;] netlink_unicast_kernel net/netlink/af_netlink.c:1314 [en línea] [&lt;000000009733081b&gt;] netlink_unicast+0x4a0/0x6a0 net/netlink/af_netlink.c:1340 [&lt;00000000d5fd43b8&gt;] enviar mensaje+0x789/0xc70 net/netlink/ af_netlink.c:1929 [&lt;000000000a2d1e40&gt;] sock_sendmsg_nosec net/socket.c:654 [en línea] [&lt;000000000a2d1e40&gt;] sock_sendmsg+0x139/0x170 net/socket.c:674 [&lt;00000000321d19 69&gt;] ____sys_sendmsg+0x658/0x7d0 neto/ socket.c:2350 [&lt;00000000964e16bc&gt;] ___sys_sendmsg+0xf8/0x170 net/socket.c:2404 [&lt;000000001615e288&gt;] __sys_sendmsg+0xd3/0x190 net/socket.c:2433 4ee8b6a5&gt;] do_syscall_64+0x37/0x90 arco /x86/entry/common.c:47 [&lt;00000000171c7cee&gt;] Entry_SYSCALL_64_after_hwframe+0x44/0xae La memoria de apuntamiento doi_def-&gt;map.std está asignada en netlbl_cipsov4_add_std, pero no se ha liberado ningún lugar. Debe liberarse en cipso_v4_doi_free, lo que libera el recurso cipso DOI.

21 May 2024, 15:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-05-21 15:15

Updated : 2024-12-30 19:00

NVD link : CVE-2021-47250

Mitre link : CVE-2021-47250

CVE.ORG link : CVE-2021-47250

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-401

Missing Release of Memory after Effective Lifetime