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Debian Security Advisory DSA 3289-1 (p7zip - security update)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
Alexander Cherepanov discovered that p7zip is susceptible to a directory traversal vulnerability. While extracting an archive, it will extract symlinks and then follow them if they are referenced in further entries. This can be exploited by a rogue archive to write files outside the current directory.
Affected Software
Affected Software
p7zip 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), this problem has been fixed in version 9.20.1~dfsg.1-4+deb7u1. For the stable distribution (jessie), this problem has been fixed in version 9.20.1~dfsg.1-4.1+deb8u1. For the unstable distribution (sid), this problem has been fixed in version 9.20.1~dfsg.1-4.2. We recommend that you upgrade your p7zip packages.