Gentoo: GLSA-202407-09: OpenSSH: Remote Code ExecutionSecurity Advisory Updates
Summary
A vulnerability has been discovered in OpenSSH. Please review the CVE
identifier referenced below for details.
Resolution
All OpenSSH users should upgrade to the latest version and restart the
sshd server (to ensure access for new sessions and no vulnerable code
keeps running).
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/openssh-9.7_p1-r6"
With OpenRC:
# rc-service sshd restart
With systemD:
# systemctl try-restart sshd.service
References
[ 1 ] CVE-2024-6387
https://nvd.nist.gov/vuln/detail/CVE-2024-6387
Availability
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/202407-09
Concerns
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.
Synopsis
A vulnerability has been discovered in OpenSSH, which can lead to remote
code execution with root privileges.
Background
OpenSSH is a free application suite consisting of server and clients
that replace tools like telnet, rlogin, rcp and ftp with more secure
versions offering additional functionality.
Affected Packages
Package Vulnerable Unaffected
---------------- ------------ ------------
net-misc/openssh < 9.7_p1-r6 >= 9.7_p1-r6
Impact
A critical vulnerability in sshd(8) was present in Portable OpenSSH
versions that may allow arbitrary code execution with root privileges.
Successful exploitation has been demonstrated on 32-bit Linux/glibc
systems with ASLR. Under lab conditions, the attack requires on
average 6-8 hours of continuous connections up to the maximum the
server will accept. Exploitation on 64-bit systems is believed to be
possible but has not been demonstrated at this time. It's likely that
these attacks will be improved upon.
Workaround
There is no known workaround at this time.
Note that Gentoo has backported the fix to the following versions:
net-misc/openssh-9.6_p1-r5
net-misc/openssh-9.7_p1-r6
