Debian LTS: Security Advisory for zsh (DLA-2470-1)

Published: 2020-12-02 04:00:14
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:P/I:P/A:P

Summary:
The remote host is missing an update for the 'zsh' Linux Distribution Package(s) announced via the DLA-2470-1 advisory.

Detection Method:
Checks if a vulnerable Linux Distribution Package version is present on the target host.

Technical Details:
Several security vulnerabilities were found and corrected in zsh, a powerful shell and scripting language. Off-by-one errors, wrong parsing of shebang lines and buffer overflows may lead to unexpected behavior. A local, unprivileged user can create a specially crafted message file or directory path. If the receiving user is privileged or traverses the aforementioned path, this leads to privilege escalation.

Affected Versions:
'zsh' Linux Distribution Package(s) on Debian Linux.

Recommendations:
For Debian 9 stretch, these problems have been fixed in version 5.3.1-4+deb9u4. We recommend that you upgrade your zsh Linux Distribution Packages.

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2017-18206
https://nvd.nist.gov/vuln/detail/CVE-2018-0502
https://nvd.nist.gov/vuln/detail/CVE-2018-1071
https://nvd.nist.gov/vuln/detail/CVE-2018-1083
https://nvd.nist.gov/vuln/detail/CVE-2018-1100
https://nvd.nist.gov/vuln/detail/CVE-2018-13259
https://nvd.nist.gov/vuln/detail/CVE-2019-20044

References:

https://lists.debian.org/debian-lts-announce/2020/12/msg00000.html
https://security-tracker.debian.org/tracker/DLA-2470-1
https://bugs.debian.org/908000
https://bugs.debian.org/894044
https://bugs.debian.org/894043
https://bugs.debian.org/895225
https://bugs.debian.org/951458

Severity
High
CVSS Score
7.5
Published
2020-12-02
Modified
2020-12-02
Category
Debian Local Security Checks

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