<p>Upgrade <code>RHEL:8</code> <code>perf</code> to version 0:4.18.0-348.el8 or higher.<br>This issue was patched in <code>RHSA-2021:4356</code>.</p>

Race Condition Affecting perf package, versions <0:4.18.0-348.el8

Threat Intelligence

0.08% (35^th percentile)

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Snyk ID SNYK-RHEL8-PERF-4187514
published 26 Jul 2021
disclosed 18 Apr 2021

Report a new vulnerability Found a mistake?

Introduced: 18 Apr 2021

CVE-2021-23133 Open this link in a new tab CWE-362 Open this link in a new tab

How to fix?

Upgrade RHEL:8 perf to version 0:4.18.0-348.el8 or higher.
This issue was patched in RHSA-2021:4356.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

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.

References

CVSS Scores

version 3.1

Attack Vector (AV)

Local
Attack Complexity (AC)

High
Privileges Required (PR)

Low
User Interaction (UI)

None

Scope (S)

Unchanged

Confidentiality (C)

High
Integrity (I)

High
Availability (A)

High

Race Condition Affecting perf package, versions <0:4.18.0-348.el8

Severity

Based on Red Hat Enterprise Linux security rating