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VPR Score: 4.2
SynopsisThe remote Debian host is missing a security update.
DescriptionIn Debian LTS (squeeze), the fix for CVE-2015-5600 in openssh 1:5.5p1-6+squeeze7 breaks authentication mechanisms that rely on the keyboard-interactive method. Thanks to Colin Watson for making aware of that.
The patch fixing CVE-2015-5600 introduces the field 'devices_done' to the KbdintAuthctxt struct, but does not initialize the field in the kbdint_alloc() function. On Linux, this ends up filling that field with junk data. The result of this are random login failures when keyboard-interactive authentication is used.
This upload of openssh 1:5.5p1-6+squeeze7 to Debian LTS (squeeze) adds that initialization of the `devices_done` field alongside the existing initialization code.
People relying on keyboard-interactive based authentication mechanisms with OpenSSH on Debian squeeze(-lts) systems are recommended to upgrade OpenSSH to 1:5.5p1-6+squeeze7.
NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
SolutionUpgrade the affected packages.