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FreeBSD Security Advisory (FreeBSD-SA-08:05.openssh.asc)

Information

Severity

Severity

Medium

Family

Family

FreeBSD Local Security Checks

CVSSv2 Base

CVSSv2 Base

6.9

CVSSv2 Vector

CVSSv2 Vector

AV:L/AC:M/Au:N/C:C/I:C/A:C

Solution Type

Solution Type

Vendor Patch

Created

Created

15 years ago

Modified

Modified

6 years ago

Summary

The remote host is missing an update to the system as announced in the referenced advisory FreeBSD-SA-08:05.openssh.asc

Insight

Insight

OpenSSH is an implementation of the SSH protocol suite, providing an encrypted and authenticated transport for a variety of services, including remote shell access. The OpenSSH server daemon (sshd) provides support for the X11 protocol by binding to a port on the server and forwarding any connections which are made to that port. When logging in via SSH with X11-forwarding enabled, sshd(8) fails to correctly handle the case where it fails to bind to an IPv4 port but successfully binds to an IPv6 port. In this case, applications which use X11 will connect to the IPv4 port, even though it had not been bound by sshd(8) and is therefore not being securely forwarded.

Solution

Solution

Upgrade your system to the appropriate stable release or security branch dated after the correction date https://secure1.securityspace.com/smysecure/catid.html?in=FreeBSD-SA-08:05.openssh.asc

Common Vulnerabilities and Exposures (CVE)