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Debian Security Advisory DSA 4377-1 (rssh - 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

3 years ago

Modified

Modified

3 years ago

Summary

The ESnet security team discovered a vulnerability in rssh, a restricted shell that allows users to perform only scp, sftp, cvs, svnserve (Subversion), rdist and/or rsync operations. Missing validation in the scp support could result in the bypass of this restriction, allowing the execution of arbitrary shell commands. Please note that with the update applied, the -3 option of scp can no longer be used.

Affected Software

Affected Software

rssh on Debian Linux

Detection Method

Detection Method

This check tests the installed software version using the apt package manager.

Solution

Solution

For the stable distribution (stretch), this problem has been fixed in version 2.3.4-5+deb9u1. We recommend that you upgrade your rssh packages. For the detailed security status of rssh please refer to its security tracker page linked in the references.

Common Vulnerabilities and Exposures (CVE)