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Debian LTS: Security Advisory for zsh (DLA-2926-1)

Information

Severity

Severity

Medium

Family

Family

Debian Local Security Checks

CVSSv2 Base

CVSSv2 Base

5.0

CVSSv2 Vector

CVSSv2 Vector

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

Solution Type

Solution Type

Vendor Patch

Created

Created

6 months ago

Modified

Modified

5 months ago

Summary

The remote host is missing an update for the 'zsh' package(s) announced via the DLA-2926-1 advisory.

Insight

Insight

It was discovered that zsh, a powerful shell and scripting language, did not prevent recursive prompt expansion. This would allow an attacker to execute arbitrary commands into a user's shell, for instance by tricking a vcs_info user into checking out a git branch with a specially crafted name.

Affected Software

Affected Software

'zsh' 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 9 stretch, this problem has been fixed in version 5.3.1-4+deb9u5. We recommend that you upgrade your zsh packages.

Common Vulnerabilities and Exposures (CVE)