CVE-2021-41073
Linux Kernel loop_rw_iter Privilege Escalation Vulnerability
Description
loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/<pid>/maps for exploitation.
INFO
Published Date :
Sept. 19, 2021, 5:15 p.m.
Last Modified :
Nov. 7, 2023, 3:38 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
Public PoC/Exploit Available at Github
CVE-2021-41073 has a 18 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2021-41073
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
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-2021-41073.
| URL | Resource |
|---|---|
| http://www.openwall.com/lists/oss-security/2021/09/18/2 | Mailing List Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2022/06/04/4 | Mailing List Third Party Advisory |
| https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=16c8d2df7ec0eed31b7d3b61cb13206a7fb930cc | Patch Vendor Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J7KSMIOQ4377CVTHMWNGNCWHMCRFRP2T/ | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAP4TXEZ7J4EZQMQW5SIJMWXG7WZT3F7/ | |
| https://security.netapp.com/advisory/ntap-20211014-0003/ | Third Party Advisory |
| https://www.debian.org/security/2021/dsa-4978 | Third Party Advisory |
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).
None
C Shell Python Assembly Ruby Makefile Meson
Auto Root / Privilege Escalation Exploit
autoroot privilege privilege-escalation root
Shell
None
Makefile Shell C C++
All CVE - PoC in GitHub
poc proofofconcept tester allcve cvegithub cvenew cvepoc cveupdate
None
Assets used in lecture "手を動かして理解するLinux Kernel Exploit" at SecurityCamp2023.
Shell C Dockerfile Python
Linux privilege escalation exploits collection.
C Shell Python Assembly Ruby Makefile Meson
None
None
None
None
Makefile C Meson
None
C
CVE Exploit PoC's
C Makefile Shell M4 Roff Perl Yacc Lex Pascal Python
Linux kernel CVE exploit analysis report and relative debug environment. You don't need to compile Linux kernel and configure your environment anymore.
C Shell Makefile Meson
A collection of proof-of-concept exploit scripts written by the STAR Labs team for various CVEs that they discovered or found by others.
JavaScript HTML Python Shell C Makefile
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-41073 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-41073 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.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAP4TXEZ7J4EZQMQW5SIJMWXG7WZT3F7/ [No types assigned] Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J7KSMIOQ4377CVTHMWNGNCWHMCRFRP2T/ [No types assigned] Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/PAP4TXEZ7J4EZQMQW5SIJMWXG7WZT3F7/ Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/J7KSMIOQ4377CVTHMWNGNCWHMCRFRP2T/ -
CWE Remap by [email protected]
Aug. 08, 2023
Action Type Old Value New Value Changed CWE CWE-269 CWE-763 -
Modified Analysis by [email protected]
Jan. 11, 2023
Action Type Old Value New Value Changed Reference Type http://www.openwall.com/lists/oss-security/2022/06/04/4 No Types Assigned http://www.openwall.com/lists/oss-security/2022/06/04/4 Mailing List, Third Party Advisory Changed CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.10 up to (including) 5.14.6 OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.10 up to (excluding) 5.10.68 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.14.7 Changed CPE Configuration OR *cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* OR *cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jun. 05, 2022
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2022/06/04/4 [No Types Assigned] -
Modified Analysis by [email protected]
Apr. 06, 2022
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/J7KSMIOQ4377CVTHMWNGNCWHMCRFRP2T/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/J7KSMIOQ4377CVTHMWNGNCWHMCRFRP2T/ Mailing List, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/PAP4TXEZ7J4EZQMQW5SIJMWXG7WZT3F7/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/PAP4TXEZ7J4EZQMQW5SIJMWXG7WZT3F7/ Mailing List, Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20211014-0003/ No Types Assigned https://security.netapp.com/advisory/ntap-20211014-0003/ Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h300e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h500e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h700e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Oct. 14, 2021
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20211014-0003/ [No Types Assigned] -
CVE Modified by [email protected]
Oct. 03, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/J7KSMIOQ4377CVTHMWNGNCWHMCRFRP2T/ [No Types Assigned] -
CVE Modified by [email protected]
Oct. 02, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/PAP4TXEZ7J4EZQMQW5SIJMWXG7WZT3F7/ [No Types Assigned] -
Initial Analysis by [email protected]
Oct. 01, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:C/I:C/A:C) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Changed Reference Type http://www.openwall.com/lists/oss-security/2021/09/18/2 No Types Assigned http://www.openwall.com/lists/oss-security/2021/09/18/2 Mailing List, Third Party Advisory Changed Reference Type https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=16c8d2df7ec0eed31b7d3b61cb13206a7fb930cc No Types Assigned https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=16c8d2df7ec0eed31b7d3b61cb13206a7fb930cc Patch, Vendor Advisory Changed Reference Type https://www.debian.org/security/2021/dsa-4978 No Types Assigned https://www.debian.org/security/2021/dsa-4978 Third Party Advisory Added CWE NIST CWE-269 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.10 up to (including) 5.14.6 Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Sep. 25, 2021
Action Type Old Value New Value Added Reference https://www.debian.org/security/2021/dsa-4978 [No Types Assigned] -
CVE Modified by [email protected]
Sep. 20, 2021
Action Type Old Value New Value Removed Reference https://twitter.com/HenkPoley/status/1439877969548390400 [No Types Assigned] -
CVE Modified by [email protected]
Sep. 20, 2021
Action Type Old Value New Value Changed Description loop_rw_iter in fs/io_uring.c in the Linux kernel through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/<pid>/maps for exploitation. loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/<pid>/maps for exploitation. Added Reference https://twitter.com/HenkPoley/status/1439877969548390400 [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-2021-41073 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-2021-41073
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} 0.00%
score
0.05635
percentile