CVE-2021-47353
Linux kernel UDF NULL Pointer Dereference Vulnerability
Description
In the Linux kernel, the following vulnerability has been resolved: udf: Fix NULL pointer dereference in udf_symlink function In function udf_symlink, epos.bh is assigned with the value returned by udf_tgetblk. The function udf_tgetblk is defined in udf/misc.c and returns the value of sb_getblk function that could be NULL. Then, epos.bh is used without any check, causing a possible NULL pointer dereference when sb_getblk fails. This fix adds a check to validate the value of epos.bh.
INFO
Published Date :
May 21, 2024, 3:15 p.m.
Last Modified :
Dec. 24, 2024, 4:11 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-2021-47353.
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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-47353 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47353 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.
-
Initial Analysis by [email protected]
Dec. 24, 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-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 4.4.276 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.5 up to (excluding) 4.9.276 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.10 up to (excluding) 4.14.240 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.198 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.133 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.51 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.12.18 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.13 up to (excluding) 5.13.3 Changed Reference Type https://git.kernel.org/stable/c/21bf1414580c36ffc8d8de043beb3508cf812238 No Types Assigned https://git.kernel.org/stable/c/21bf1414580c36ffc8d8de043beb3508cf812238 Patch Changed Reference Type https://git.kernel.org/stable/c/21bf1414580c36ffc8d8de043beb3508cf812238 No Types Assigned https://git.kernel.org/stable/c/21bf1414580c36ffc8d8de043beb3508cf812238 Patch Changed Reference Type https://git.kernel.org/stable/c/2f3d9ddd32a28803baa547e6274983b67d5e287c No Types Assigned https://git.kernel.org/stable/c/2f3d9ddd32a28803baa547e6274983b67d5e287c Patch Changed Reference Type https://git.kernel.org/stable/c/2f3d9ddd32a28803baa547e6274983b67d5e287c No Types Assigned https://git.kernel.org/stable/c/2f3d9ddd32a28803baa547e6274983b67d5e287c Patch Changed Reference Type https://git.kernel.org/stable/c/3638705ecd5ad2785e996f820121c0ad15ce64b5 No Types Assigned https://git.kernel.org/stable/c/3638705ecd5ad2785e996f820121c0ad15ce64b5 Patch Changed Reference Type https://git.kernel.org/stable/c/3638705ecd5ad2785e996f820121c0ad15ce64b5 No Types Assigned https://git.kernel.org/stable/c/3638705ecd5ad2785e996f820121c0ad15ce64b5 Patch Changed Reference Type https://git.kernel.org/stable/c/371566f63cbd0bb6fbb25b8fe9d5798268d35af9 No Types Assigned https://git.kernel.org/stable/c/371566f63cbd0bb6fbb25b8fe9d5798268d35af9 Patch Changed Reference Type https://git.kernel.org/stable/c/371566f63cbd0bb6fbb25b8fe9d5798268d35af9 No Types Assigned https://git.kernel.org/stable/c/371566f63cbd0bb6fbb25b8fe9d5798268d35af9 Patch Changed Reference Type https://git.kernel.org/stable/c/5150877e4d99f85057a458daac7cd7c01005d5c6 No Types Assigned https://git.kernel.org/stable/c/5150877e4d99f85057a458daac7cd7c01005d5c6 Patch Changed Reference Type https://git.kernel.org/stable/c/5150877e4d99f85057a458daac7cd7c01005d5c6 No Types Assigned https://git.kernel.org/stable/c/5150877e4d99f85057a458daac7cd7c01005d5c6 Patch Changed Reference Type https://git.kernel.org/stable/c/80d505aee6398cf8beb72475c7edcf1733c1c68b No Types Assigned https://git.kernel.org/stable/c/80d505aee6398cf8beb72475c7edcf1733c1c68b Patch Changed Reference Type https://git.kernel.org/stable/c/80d505aee6398cf8beb72475c7edcf1733c1c68b No Types Assigned https://git.kernel.org/stable/c/80d505aee6398cf8beb72475c7edcf1733c1c68b Patch Changed Reference Type https://git.kernel.org/stable/c/aebed6b19e51a34003d998da5ebb1dfdd2cb1d02 No Types Assigned https://git.kernel.org/stable/c/aebed6b19e51a34003d998da5ebb1dfdd2cb1d02 Patch Changed Reference Type https://git.kernel.org/stable/c/aebed6b19e51a34003d998da5ebb1dfdd2cb1d02 No Types Assigned https://git.kernel.org/stable/c/aebed6b19e51a34003d998da5ebb1dfdd2cb1d02 Patch Changed Reference Type https://git.kernel.org/stable/c/baea588a42d675e35daeaddd10fbc9700550bc4d No Types Assigned https://git.kernel.org/stable/c/baea588a42d675e35daeaddd10fbc9700550bc4d Patch Changed Reference Type https://git.kernel.org/stable/c/baea588a42d675e35daeaddd10fbc9700550bc4d No Types Assigned https://git.kernel.org/stable/c/baea588a42d675e35daeaddd10fbc9700550bc4d Patch Changed Reference Type https://git.kernel.org/stable/c/fa236c2b2d4436d9f19ee4e5d5924e90ffd7bb43 No Types Assigned https://git.kernel.org/stable/c/fa236c2b2d4436d9f19ee4e5d5924e90ffd7bb43 Patch Changed Reference Type https://git.kernel.org/stable/c/fa236c2b2d4436d9f19ee4e5d5924e90ffd7bb43 No Types Assigned https://git.kernel.org/stable/c/fa236c2b2d4436d9f19ee4e5d5924e90ffd7bb43 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/21bf1414580c36ffc8d8de043beb3508cf812238 Added Reference https://git.kernel.org/stable/c/2f3d9ddd32a28803baa547e6274983b67d5e287c Added Reference https://git.kernel.org/stable/c/3638705ecd5ad2785e996f820121c0ad15ce64b5 Added Reference https://git.kernel.org/stable/c/371566f63cbd0bb6fbb25b8fe9d5798268d35af9 Added Reference https://git.kernel.org/stable/c/5150877e4d99f85057a458daac7cd7c01005d5c6 Added Reference https://git.kernel.org/stable/c/80d505aee6398cf8beb72475c7edcf1733c1c68b Added Reference https://git.kernel.org/stable/c/aebed6b19e51a34003d998da5ebb1dfdd2cb1d02 Added Reference https://git.kernel.org/stable/c/baea588a42d675e35daeaddd10fbc9700550bc4d Added Reference https://git.kernel.org/stable/c/fa236c2b2d4436d9f19ee4e5d5924e90ffd7bb43 -
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: udf: Fix NULL pointer dereference in udf_symlink function In function udf_symlink, epos.bh is assigned with the value returned by udf_tgetblk. The function udf_tgetblk is defined in udf/misc.c and returns the value of sb_getblk function that could be NULL. Then, epos.bh is used without any check, causing a possible NULL pointer dereference when sb_getblk fails. This fix adds a check to validate the value of epos.bh. Added Reference kernel.org https://git.kernel.org/stable/c/2f3d9ddd32a28803baa547e6274983b67d5e287c [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/371566f63cbd0bb6fbb25b8fe9d5798268d35af9 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/baea588a42d675e35daeaddd10fbc9700550bc4d [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/3638705ecd5ad2785e996f820121c0ad15ce64b5 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/80d505aee6398cf8beb72475c7edcf1733c1c68b [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/21bf1414580c36ffc8d8de043beb3508cf812238 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/aebed6b19e51a34003d998da5ebb1dfdd2cb1d02 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/5150877e4d99f85057a458daac7cd7c01005d5c6 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/fa236c2b2d4436d9f19ee4e5d5924e90ffd7bb43 [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-2021-47353 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-2021-47353
weaknesses.