Blogs

Gnome Screensaver authentication bypass vulnerability (Ubuntu, maybe others)

http://www.securityfocus.com/bid/37240/info

This reminds me of the days of Windows 95/3.1 where you could bypass the
screensaver just by hitting the right sequence of keys.

This vulnerability specifically targets Ubuntu, but may be applicable to
other installations of v2.28 as well.

Testing the exploit under Fedora 11 and 12 does not duplicate the issue.

It is recommended for Ubuntu users to update their machines to the
latest version of gnome-screensaver to avoid this issue.

Gnome Screensaver authentication bypass vulnerability (Ubuntu, maybe others)

http://www.securityfocus.com/bid/37240/info

This reminds me of the days of Windows 95/3.1 where you could bypass the
screensaver just by hitting the right sequence of keys.

This vulnerability specifically targets Ubuntu, but may be applicable to
other installations of v2.28 as well.

Testing the exploit under Fedora 11 and 12 does not duplicate the issue.

It is recommended for Ubuntu users to update their machines to the
latest version of gnome-screensaver to avoid this issue.

RHSA-2009:1659-1: Moderate: kvm security and bug fix update, guest could cause DoS of host machine

http://rhn.redhat.com/errata/RHSA-2009-1659.html

A moderate security vulnerability could allow a malicious user on a
guest VM to cause a DoS attack on the underlying host.

This patch also updates a few other non-security related bugs in the
software as explained at the above link.

It is recommended to update to a version of KVM that includes these
security fixes.

RHSA-2009:1659-1: Moderate: kvm security and bug fix update, guest could cause DoS of host machine

http://rhn.redhat.com/errata/RHSA-2009-1659.html

A moderate security vulnerability could allow a malicious user on a
guest VM to cause a DoS attack on the underlying host.

This patch also updates a few other non-security related bugs in the
software as explained at the above link.

It is recommended to update to a version of KVM that includes these
security fixes.

NTP mode 7 denial-of-service vulnerability

http://www.kb.cert.org/vuls/id/568372

A simple 1 byte payload spoofed UDP packet could cause a DoS between two
ntp servers. The packet will cause the two ntp servers to bounce the
information back and forth, eventually exhausting resources.

"This issue is addressed in NTP 4.2.4p8."

It is also probable that this issue affects both systems and hardward
NTP appliances.

NTP mode 7 denial-of-service vulnerability

http://www.kb.cert.org/vuls/id/568372

A simple 1 byte payload spoofed UDP packet could cause a DoS between two
ntp servers. The packet will cause the two ntp servers to bounce the
information back and forth, eventually exhausting resources.

"This issue is addressed in NTP 4.2.4p8."

It is also probable that this issue affects both systems and hardward
NTP appliances.

Gnome Screensaver authentication bypass vulnerability (Ubuntu, maybe others)

http://www.securityfocus.com/bid/37240/info

This reminds me of the days of Windows 95/3.1 where you could bypass the
screensaver just by hitting the right sequence of keys.

This vulnerability specifically targets Ubuntu, but may be applicable to
other installations of v2.28 as well.

Testing the exploit under Fedora 11 and 12 does not duplicate the issue.

It is recommended for Ubuntu users to update their machines to the
latest version of gnome-screensaver to avoid this issue.

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