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Debian Security Advisory DSA 3289-1 (p7zip - security update)

Information

Severity

Severity

Medium

Family

Family

Debian Local Security Checks

CVSSv2 Base

CVSSv2 Base

5.8

CVSSv2 Vector

CVSSv2 Vector

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

Solution Type

Solution Type

Vendor Patch

Created

Created

7 years ago

Modified

Modified

8 months ago

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.

Common Vulnerabilities and Exposures (CVE)