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7.0 High

CVE-2024-6409 Openssh: possible remote code execution due to a race condition in signal handling affecting red hat enterprise linux 9

Description

A race condition vulnerability was discovered in how signals are handled by OpenSSH's server (sshd). If a remote attacker does not authenticate within a set time period, then sshd's SIGALRM handler is called asynchronously. However, this signal handler calls various functions that are not async-signal-safe, for example, syslog(). As a consequence of a successful attack, in the worst case scenario, an attacker may be able to perform a remote code execution (RCE) as an unprivileged user running the sshd server.

CVSS 3.1 detail

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

Exploitable remotely over the network, without an account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector
Network
Attack complexity
High
Privileges required
None
Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High

Affected products and versions

Product Affected versions Fixed in
Red Hat Enterprise Linux 9 Versions not published
Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Versions not published
Red Hat Enterprise Linux 9.2 Extended Update Support Versions not published
Red Hat OpenShift Container Platform 4.13 413.92 earliest → < 413.92.202408122222-0 413.92.202408122222-0
Red Hat OpenShift Container Platform 4.14 414.92 earliest → < 414.92.202407300859-0 414.92.202407300859-0
Red Hat OpenShift Container Platform 4.15 415.92 earliest → < 415.92.202407301159-0 415.92.202407301159-0
Red Hat OpenShift Container Platform 4.16 416.94 earliest → < 416.94.202407171205-0 416.94.202407171205-0
Red Hat Enterprise Linux 10 Versions not published
Red Hat Enterprise Linux 6 Versions not published
Show the 5 other branches
Product Affected versions Fixed in
Red Hat Enterprise Linux 7 Versions not published
Red Hat Enterprise Linux 8 Versions not published
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1 3.1.0 → < 3.1.5 3.1.5
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1 3.1.0 → < 3.1.5 3.1.5
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1 3.1.0 → < 3.1.5 3.1.5

References

Timeline

  1. Published
  2. Last modified

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