CVE-2021-47291
"Linux Kernel IPv6 Fib6 NH Flush Exceptions Slab Out-of-Bounds Vulnerability"
Description
In the Linux kernel, the following vulnerability has been resolved: ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions While running the self-tests on a KASAN enabled kernel, I observed a slab-out-of-bounds splat very similar to the one reported in commit 821bbf79fe46 ("ipv6: Fix KASAN: slab-out-of-bounds Read in fib6_nh_flush_exceptions"). We additionally need to take care of fib6_metrics initialization failure when the caller provides an nh. The fix is similar, explicitly free the route instead of calling fib6_info_release on a half-initialized object.
INFO
Published Date :
May 21, 2024, 3:15 p.m.
Last Modified :
Dec. 23, 2024, 4:47 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
5.2
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-2021-47291.
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-2021-47291 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47291 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. 23, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H Added CWE NIST CWE-125 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.3 up to (excluding) 5.4.136 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.54 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.13.6 *cpe:2.3:o:linux:linux_kernel:5.14:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.14:rc2:*:*:*:*:*:* Changed Reference Type https://git.kernel.org/stable/c/115784bcccf135c3a3548098153413d76f16aae0 No Types Assigned https://git.kernel.org/stable/c/115784bcccf135c3a3548098153413d76f16aae0 Patch Changed Reference Type https://git.kernel.org/stable/c/115784bcccf135c3a3548098153413d76f16aae0 No Types Assigned https://git.kernel.org/stable/c/115784bcccf135c3a3548098153413d76f16aae0 Patch Changed Reference Type https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6 No Types Assigned https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6 Patch Changed Reference Type https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6 No Types Assigned https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6 Patch Changed Reference Type https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5 No Types Assigned https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5 Patch Changed Reference Type https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5 No Types Assigned https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5 Patch Changed Reference Type https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680 No Types Assigned https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680 Patch Changed Reference Type https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680 No Types Assigned https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680 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/115784bcccf135c3a3548098153413d76f16aae0 Added Reference https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6 Added Reference https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5 Added Reference https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680 -
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: ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions While running the self-tests on a KASAN enabled kernel, I observed a slab-out-of-bounds splat very similar to the one reported in commit 821bbf79fe46 ("ipv6: Fix KASAN: slab-out-of-bounds Read in fib6_nh_flush_exceptions"). We additionally need to take care of fib6_metrics initialization failure when the caller provides an nh. The fix is similar, explicitly free the route instead of calling fib6_info_release on a half-initialized object. Added Reference kernel.org https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/115784bcccf135c3a3548098153413d76f16aae0 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5 [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-2021-47291 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-2021-47291
weaknesses.