CVE-2021-47086
Linux Kernel Phonet PEP Unbound Pipe Refusal Vulnerability
Description
In the Linux kernel, the following vulnerability has been resolved: phonet/pep: refuse to enable an unbound pipe This ioctl() implicitly assumed that the socket was already bound to a valid local socket name, i.e. Phonet object. If the socket was not bound, two separate problems would occur: 1) We'd send an pipe enablement request with an invalid source object. 2) Later socket calls could BUG on the socket unexpectedly being connected yet not bound to a valid object.
INFO
Published Date :
March 4, 2024, 6:15 p.m.
Last Modified :
Jan. 16, 2025, 5:13 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the affected Linux kernel package.
- Reboot the system to apply the update.
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-2021-47086.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47086 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-2021-47086
weaknesses.
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-2021-47086 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47086 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]
Jan. 16, 2025
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 NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 4.4.297 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.5 up to (excluding) 4.9.295 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.10 up to (excluding) 4.14.260 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.223 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.169 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.89 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.12 *cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16:rc6:*:*:*:*:*:* Changed Reference Type https://git.kernel.org/stable/c/0bbdd62ce9d44f3a22059b3d20a0df977d9f6d59 No Types Assigned https://git.kernel.org/stable/c/0bbdd62ce9d44f3a22059b3d20a0df977d9f6d59 Patch Changed Reference Type https://git.kernel.org/stable/c/0bbdd62ce9d44f3a22059b3d20a0df977d9f6d59 No Types Assigned https://git.kernel.org/stable/c/0bbdd62ce9d44f3a22059b3d20a0df977d9f6d59 Patch Changed Reference Type https://git.kernel.org/stable/c/311601f114859d586d5ef8833d60d3aa23282161 No Types Assigned https://git.kernel.org/stable/c/311601f114859d586d5ef8833d60d3aa23282161 Patch Changed Reference Type https://git.kernel.org/stable/c/311601f114859d586d5ef8833d60d3aa23282161 No Types Assigned https://git.kernel.org/stable/c/311601f114859d586d5ef8833d60d3aa23282161 Patch Changed Reference Type https://git.kernel.org/stable/c/48c76fc53582e7f13c1e0b11c916e503256c4d0b No Types Assigned https://git.kernel.org/stable/c/48c76fc53582e7f13c1e0b11c916e503256c4d0b Patch Changed Reference Type https://git.kernel.org/stable/c/48c76fc53582e7f13c1e0b11c916e503256c4d0b No Types Assigned https://git.kernel.org/stable/c/48c76fc53582e7f13c1e0b11c916e503256c4d0b Patch Changed Reference Type https://git.kernel.org/stable/c/52ad5da8e316fa11e3a50b3f089aa63e4089bf52 No Types Assigned https://git.kernel.org/stable/c/52ad5da8e316fa11e3a50b3f089aa63e4089bf52 Patch Changed Reference Type https://git.kernel.org/stable/c/52ad5da8e316fa11e3a50b3f089aa63e4089bf52 No Types Assigned https://git.kernel.org/stable/c/52ad5da8e316fa11e3a50b3f089aa63e4089bf52 Patch Changed Reference Type https://git.kernel.org/stable/c/53ccdc73eedaf0e922c45b569b797d2796fbaafa No Types Assigned https://git.kernel.org/stable/c/53ccdc73eedaf0e922c45b569b797d2796fbaafa Patch Changed Reference Type https://git.kernel.org/stable/c/53ccdc73eedaf0e922c45b569b797d2796fbaafa No Types Assigned https://git.kernel.org/stable/c/53ccdc73eedaf0e922c45b569b797d2796fbaafa Patch Changed Reference Type https://git.kernel.org/stable/c/75a2f31520095600f650597c0ac41f48b5ba0068 No Types Assigned https://git.kernel.org/stable/c/75a2f31520095600f650597c0ac41f48b5ba0068 Patch Changed Reference Type https://git.kernel.org/stable/c/75a2f31520095600f650597c0ac41f48b5ba0068 No Types Assigned https://git.kernel.org/stable/c/75a2f31520095600f650597c0ac41f48b5ba0068 Patch Changed Reference Type https://git.kernel.org/stable/c/982b6ba1ce626ef87e5c29f26f2401897554f235 No Types Assigned https://git.kernel.org/stable/c/982b6ba1ce626ef87e5c29f26f2401897554f235 Patch Changed Reference Type https://git.kernel.org/stable/c/982b6ba1ce626ef87e5c29f26f2401897554f235 No Types Assigned https://git.kernel.org/stable/c/982b6ba1ce626ef87e5c29f26f2401897554f235 Patch Changed Reference Type https://git.kernel.org/stable/c/b10c7d745615a092a50c2e03ce70446d2bec2aca No Types Assigned https://git.kernel.org/stable/c/b10c7d745615a092a50c2e03ce70446d2bec2aca Patch Changed Reference Type https://git.kernel.org/stable/c/b10c7d745615a092a50c2e03ce70446d2bec2aca No Types Assigned https://git.kernel.org/stable/c/b10c7d745615a092a50c2e03ce70446d2bec2aca 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/0bbdd62ce9d44f3a22059b3d20a0df977d9f6d59 Added Reference https://git.kernel.org/stable/c/311601f114859d586d5ef8833d60d3aa23282161 Added Reference https://git.kernel.org/stable/c/48c76fc53582e7f13c1e0b11c916e503256c4d0b Added Reference https://git.kernel.org/stable/c/52ad5da8e316fa11e3a50b3f089aa63e4089bf52 Added Reference https://git.kernel.org/stable/c/53ccdc73eedaf0e922c45b569b797d2796fbaafa Added Reference https://git.kernel.org/stable/c/75a2f31520095600f650597c0ac41f48b5ba0068 Added Reference https://git.kernel.org/stable/c/982b6ba1ce626ef87e5c29f26f2401897554f235 Added Reference https://git.kernel.org/stable/c/b10c7d745615a092a50c2e03ce70446d2bec2aca -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Mar. 04, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: phonet/pep: refuse to enable an unbound pipe This ioctl() implicitly assumed that the socket was already bound to a valid local socket name, i.e. Phonet object. If the socket was not bound, two separate problems would occur: 1) We'd send an pipe enablement request with an invalid source object. 2) Later socket calls could BUG on the socket unexpectedly being connected yet not bound to a valid object. Added Reference Linux https://git.kernel.org/stable/c/0bbdd62ce9d44f3a22059b3d20a0df977d9f6d59 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/b10c7d745615a092a50c2e03ce70446d2bec2aca [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/311601f114859d586d5ef8833d60d3aa23282161 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/982b6ba1ce626ef87e5c29f26f2401897554f235 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/48c76fc53582e7f13c1e0b11c916e503256c4d0b [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/52ad5da8e316fa11e3a50b3f089aa63e4089bf52 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/53ccdc73eedaf0e922c45b569b797d2796fbaafa [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/75a2f31520095600f650597c0ac41f48b5ba0068 [No types assigned]