CVE-2021-23133 (GCVE-0-2021-23133)

Vulnerability from cvelistv5 – Published: 2021-04-22 18:00 – Updated: 2024-09-16 19:04
VLAI?
Title
Linux Kernel sctp_destroy_sock race condition
Summary
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.
Severity ?
6.7 (Medium)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-362 - Race Condition (Concurrent Execution using Shared Resource with Improper Synchronization)
Assigner
References
Impacted products
Vendor Product Version
Linux Kernel Linux Kernel Affected: unspecified , < 5.12-rc8 (custom)
Create a notification for this product.
Credits
Or Cohen from Palo Alto Networks
Show details on NVD website
To clipboard 

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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