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Debian LTS Advisory ([SECURITY] [DLA 1762-1] systemd security update)

Information

Severity

Severity

Medium

Family

Family

Debian Local Security Checks

CVSSv2 Base

CVSSv2 Base

4.6

CVSSv2 Vector

CVSSv2 Vector

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

Solution Type

Solution Type

Vendor Patch

Created

Created

4 years ago

Modified

Modified

4 years ago

Summary

The remote host is missing an update for the 'systemd' package(s) announced via the DSA-1762-1 advisory.

Insight

Insight

Two vulnerabilities have been addressed in the systemd components systemd-tmpfiles and pam_systemd.so. CVE-2017-18078 systemd-tmpfiles in systemd attempted to support ownership/permission changes on hardlinked files even if the fs.protected_hardlinks sysctl is turned off, which allowed local users to bypass intended access restrictions via vectors involving a hard link to a file for which the user lacked write access. CVE-2019-3842 It was discovered that pam_systemd did not properly sanitize the environment before using the XDG_SEAT variable. It was possible for an attacker, in some particular configurations, to set a XDG_SEAT environment variable which allowed for commands to be checked against polkit policies using the 'allow_active' element rather than 'allow_any'.

Affected Software

Affected Software

'systemd' package(s) on Debian Linux.

Detection Method

Detection Method

Checks if a vulnerable package version is present on the target host.

Solution

Solution

For Debian 8 'Jessie', these problems have been fixed in version 215-17+deb8u12. We recommend that you upgrade your systemd packages.

Common Vulnerabilities and Exposures (CVE)