Vulnerability Description
A race condition in Linux kernel SCTP sockets (net/sctp/socket.c) before 5.12-rc8 can lead to kernel privilege escalation from the context of a network service or an unprivileged process. If sctp_destroy_sock is called without sock_net(sk)->sctp.addr_wq_lock then an element is removed from the auto_asconf_splist list without any proper locking. This can be exploited by an attacker with network service privileges to escalate to root or from the context of an unprivileged user directly if a BPF_CGROUP_INET_SOCK_CREATE is attached which denies creation of some SCTP socket.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.10, < 4.14.232 |
| Fedoraproject | Fedora | 32 |
| Debian | Debian Linux | 9.0 |
| Netapp | Cloud Backup | - |
| Netapp | Solidfire \& Hci Management Node | - |
| Broadcom | Brocade Fabric Operating System | - |
| Netapp | H410C Firmware | - |
| Netapp | H410C | - |
| Netapp | H300S Firmware | - |
| Netapp | H300S | - |
| Netapp | H500S Firmware | - |
| Netapp | H500S | - |
| Netapp | H700S Firmware | - |
| Netapp | H700S | - |
| Netapp | H300E Firmware | - |
| Netapp | H300E | - |
| Netapp | H500E Firmware | - |
| Netapp | H500E | - |
| Netapp | H700E Firmware | - |
| Netapp | H700E | - |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2021/05/10/1Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/05/10/2Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/05/10/3Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/05/10/4Mailing ListPatchThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b1Mailing ListPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00019.htmlMitigationThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00020.htmlMitigationThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.netapp.com/advisory/ntap-20210611-0008/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/04/18/2ExploitMailing ListPatch
- http://www.openwall.com/lists/oss-security/2021/05/10/1Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/05/10/2Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/05/10/3Mailing ListPatchThird Party Advisory
FAQ
What is CVE-2021-23133?
CVE-2021-23133 is a vulnerability with a CVSS score of 6.7 (MEDIUM). A race condition in Linux kernel SCTP sockets (net/sctp/socket.c) before 5.12-rc8 can lead to kernel privilege escalation from the context of a network service or an unprivileged process. If sctp_dest...
How severe is CVE-2021-23133?
CVE-2021-23133 has been rated MEDIUM with a CVSS base score of 6.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-23133?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Fedoraproject Fedora, Debian Debian Linux, Netapp Cloud Backup, Netapp Solidfire \& Hci Management Node.