CVE-2021-43267
CRITICALCVSS 9.8/10EPSS 57.85%
Last modified
CVE-2021-43267 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered in net/tipc/crypto.c in the Linux kernel before 5.14.16. The Transparent Inter-Process Communication (TIPC) functionality allows remote attackers to exploit insufficient validation of user-supplied sizes for the MSG_CRYPTO message type.. EPSS estimates a 57.85% chance of exploitation in the next 30 days.
Description
An issue was discovered in net/tipc/crypto.c in the Linux kernel before 5.14.16. The Transparent Inter-Process Communication (TIPC) functionality allows remote attackers to exploit insufficient validation of user-supplied sizes for the MSG_CRYPTO message type.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.10, < 5.10.77 |
| Linux | Linux Kernel | >= 5.11, < 5.14.16 |
| Fedoraproject | Fedora | 34 |
| Fedoraproject | Fedora | 35 |
| Netapp | H300s Firmware | All versions |
| Netapp | H500s Firmware | All versions |
| Netapp | H700s Firmware | All versions |
| Netapp | H300e Firmware | All versions |
| Netapp | H500e Firmware | All versions |
| Netapp | H700e Firmware | All versions |
| Netapp | H410s Firmware | All versions |
References
- http://www.openwall.com/lists/oss-security/2022/02/10/1Exploit, Mailing List, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.16Mailing List, Release Notes, Vendor Advisory
- https://github.com/torvalds/linux/commit/fa40d9734a57bcbfa79a280189799f76c88f7bb0Patch, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211125-0002/Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/02/10/1Exploit, Mailing List, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.16Mailing List, Release Notes, Vendor Advisory
- https://github.com/torvalds/linux/commit/fa40d9734a57bcbfa79a280189799f76c88f7bb0Patch, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211125-0002/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-43267?
An issue was discovered in net/tipc/crypto.c in the Linux kernel before 5.14.16. The Transparent Inter-Process Communication (TIPC) functionality allows remote attackers to exploit insufficient validation of user-supplied sizes for the MSG_CRYPTO message type.
How severe is CVE-2021-43267?
CVE-2021-43267 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 57.85% probability of exploitation in the next 30 days.
How do I fix CVE-2021-43267?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-43257Lack of Neutralization of Formula Elements in the CSV API of…7.8
- CVE-2021-43258CartView.php in ChurchInfo 1.3.0 allows attackers to achieve…8.8
- CVE-2021-4326A vulnerability in Imperative framework which allows already…7.8
- CVE-2021-43264In Mahara before 20.04.5, 20.10.3, 21.04.2, and 21.10.0, adj…3.3
- CVE-2021-43265In Mahara before 20.04.5, 20.10.3, 21.04.2, and 21.10.0, cer…5.4
- CVE-2021-43266In Mahara before 20.04.5, 20.10.3, 21.04.2, and 21.10.0, exp…7.3
- CVE-2021-43268An issue was discovered in VxWorks 6.9 through 7. In the IKE…6.5
- CVE-2021-43269In Code42 app before 8.8.0, eval injection allows an attacke…8.8
- CVE-2021-4327A vulnerability was found in SerenityOS. It has been rated a…9.8
- CVE-2021-43270Datalust Seq.App.EmailPlus (aka seq-app-htmlemail) 3.1.0-dev…7.5
- CVE-2021-43271Riverbed AppResponse 11.8.0, 11.8.5, 11.8.5a, 11.9.0, 11.9.0…6.8
- CVE-2021-43272An improper handling of exceptional conditions vulnerability…9.8
Are you affected by CVE-2021-43267?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST