Branch p8 update bulletin.

Package kernel-image-un-def updated to version 4.19.189-alt0.M80P.1 for branch p8 in task 270909.

Published: 2021-04-13

BDU:2021-04855

Уязвимость компонента net/sctp/socket.c ядра операционной системы Linux, позволяющая нарушителю повысить свои привилегии

Severity: HIGH (7.0) Vector: AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References:

CVE-2021-23133

Published: 2021-04-22
Modified: 2024-11-21

CVE-2021-23133

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: HIGH (7.0) Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References:

Version: 2.1.0

Branch p8 update on 2021-05-01

ALT-BU-2021-3887-1

ALT-PU-2021-1749-1

Closed vulnerabilities

BDU:2021-04855

CVE-2021-23133