CVE-2021-47250
Linux Kernel Netlabel Memory Leak in netlbl_cipsov4_add_std
Description
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.
INFO
Published Date :
May 21, 2024, 3:15 p.m.
Last Modified :
Dec. 30, 2024, 7 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-47250.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2021-47250 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47250 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Dec. 30, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NIST CWE-401 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.19 up to (excluding) 4.4.274 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.5 up to (excluding) 4.9.274 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.10 up to (excluding) 4.14.238 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.196 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.128 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.46 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.12.13 *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:*:*:*:*:*:* Changed Reference Type https://git.kernel.org/stable/c/086e92b1d68c6338535f715aad173f8cf4bfbc8c No Types Assigned https://git.kernel.org/stable/c/086e92b1d68c6338535f715aad173f8cf4bfbc8c Patch Changed Reference Type https://git.kernel.org/stable/c/086e92b1d68c6338535f715aad173f8cf4bfbc8c No Types Assigned https://git.kernel.org/stable/c/086e92b1d68c6338535f715aad173f8cf4bfbc8c Patch Changed Reference Type https://git.kernel.org/stable/c/0ffb460be3abac86f884a8c548bb02724ec370f4 No Types Assigned https://git.kernel.org/stable/c/0ffb460be3abac86f884a8c548bb02724ec370f4 Patch Changed Reference Type https://git.kernel.org/stable/c/0ffb460be3abac86f884a8c548bb02724ec370f4 No Types Assigned https://git.kernel.org/stable/c/0ffb460be3abac86f884a8c548bb02724ec370f4 Patch Changed Reference Type https://git.kernel.org/stable/c/212166510582631994be4f4b3fe15e10a03c1dd4 No Types Assigned https://git.kernel.org/stable/c/212166510582631994be4f4b3fe15e10a03c1dd4 Patch Changed Reference Type https://git.kernel.org/stable/c/212166510582631994be4f4b3fe15e10a03c1dd4 No Types Assigned https://git.kernel.org/stable/c/212166510582631994be4f4b3fe15e10a03c1dd4 Patch Changed Reference Type https://git.kernel.org/stable/c/398a24447eb60f060c8994221cb5ae6caf355fa1 No Types Assigned https://git.kernel.org/stable/c/398a24447eb60f060c8994221cb5ae6caf355fa1 Patch Changed Reference Type https://git.kernel.org/stable/c/398a24447eb60f060c8994221cb5ae6caf355fa1 No Types Assigned https://git.kernel.org/stable/c/398a24447eb60f060c8994221cb5ae6caf355fa1 Patch Changed Reference Type https://git.kernel.org/stable/c/5340858147e3dc60913fb3dd0cbb758ec4a26e66 No Types Assigned https://git.kernel.org/stable/c/5340858147e3dc60913fb3dd0cbb758ec4a26e66 Patch Changed Reference Type https://git.kernel.org/stable/c/5340858147e3dc60913fb3dd0cbb758ec4a26e66 No Types Assigned https://git.kernel.org/stable/c/5340858147e3dc60913fb3dd0cbb758ec4a26e66 Patch Changed Reference Type https://git.kernel.org/stable/c/6dcea66d3bb519b426282588f38e884e07893c1f No Types Assigned https://git.kernel.org/stable/c/6dcea66d3bb519b426282588f38e884e07893c1f Patch Changed Reference Type https://git.kernel.org/stable/c/6dcea66d3bb519b426282588f38e884e07893c1f No Types Assigned https://git.kernel.org/stable/c/6dcea66d3bb519b426282588f38e884e07893c1f Patch Changed Reference Type https://git.kernel.org/stable/c/d612c3f3fae221e7ea736d196581c2217304bbbc No Types Assigned https://git.kernel.org/stable/c/d612c3f3fae221e7ea736d196581c2217304bbbc Patch Changed Reference Type https://git.kernel.org/stable/c/d612c3f3fae221e7ea736d196581c2217304bbbc No Types Assigned https://git.kernel.org/stable/c/d612c3f3fae221e7ea736d196581c2217304bbbc Patch Changed Reference Type https://git.kernel.org/stable/c/deeeb65c6ee404f2d1fb80b38b2730645c0f4663 No Types Assigned https://git.kernel.org/stable/c/deeeb65c6ee404f2d1fb80b38b2730645c0f4663 Patch Changed Reference Type https://git.kernel.org/stable/c/deeeb65c6ee404f2d1fb80b38b2730645c0f4663 No Types Assigned https://git.kernel.org/stable/c/deeeb65c6ee404f2d1fb80b38b2730645c0f4663 Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/086e92b1d68c6338535f715aad173f8cf4bfbc8c Added Reference https://git.kernel.org/stable/c/0ffb460be3abac86f884a8c548bb02724ec370f4 Added Reference https://git.kernel.org/stable/c/212166510582631994be4f4b3fe15e10a03c1dd4 Added Reference https://git.kernel.org/stable/c/398a24447eb60f060c8994221cb5ae6caf355fa1 Added Reference https://git.kernel.org/stable/c/5340858147e3dc60913fb3dd0cbb758ec4a26e66 Added Reference https://git.kernel.org/stable/c/6dcea66d3bb519b426282588f38e884e07893c1f Added Reference https://git.kernel.org/stable/c/d612c3f3fae221e7ea736d196581c2217304bbbc Added Reference https://git.kernel.org/stable/c/deeeb65c6ee404f2d1fb80b38b2730645c0f4663 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 21, 2024
Action Type Old Value New Value Added Description 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. Added Reference kernel.org https://git.kernel.org/stable/c/212166510582631994be4f4b3fe15e10a03c1dd4 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/086e92b1d68c6338535f715aad173f8cf4bfbc8c [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/6dcea66d3bb519b426282588f38e884e07893c1f [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/5340858147e3dc60913fb3dd0cbb758ec4a26e66 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/398a24447eb60f060c8994221cb5ae6caf355fa1 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/deeeb65c6ee404f2d1fb80b38b2730645c0f4663 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/0ffb460be3abac86f884a8c548bb02724ec370f4 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/d612c3f3fae221e7ea736d196581c2217304bbbc [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47250 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-47250
weaknesses.