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Debian Security Advisory DSA 3451-1 (fuse - security update)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
Jann Horn discovered a vulnerability in the fuse (Filesystem in Userspace) package in Debian. The fuse package ships an udev rule adjusting permissions on the related /dev/cuse character device, making it world writable. This permits a local, unprivileged attacker to create an arbitrarily-named character device in /dev and modify the memory of any process that opens it and performs an ioctl on it. This in turn might allow a local, unprivileged attacker to escalate to root privileges.
Affected Software
Affected Software
fuse on Debian Linux
Detection Method
Detection Method
This check tests the installed software version using the apt package manager.
Solution
Solution
For the oldstable distribution (wheezy), the fuse package is not affected. For the stable distribution (jessie), this problem has been fixed in version 2.9.3-15+deb8u2. For the testing distribution (stretch), this problem has been fixed in version 2.9.5-1. For the unstable distribution (sid), this problem has been fixed in version 2.9.5-1. We recommend that you upgrade your fuse packages.