Detections
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Ubuntu 20.10 : kramdown vulnerability (USN-4562-2)
critical Nessus Plugin ID 141922
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Synopsis
The remote Ubuntu host is missing a security update.Description
The remote Ubuntu 20.10 host has packages installed that are affected by a vulnerability as referenced in the USN-4562-2 advisory.- The kramdown gem before 2.3.0 for Ruby processes the template option inside Kramdown documents by default, which allows unintended read access (such as template=/etc/passwd) or unintended embedded Ruby code execution (such as a string that begins with template=string://<%= `). NOTE: kramdown is used in Jekyll, GitLab Pages, GitHub Pages, and Thredded Forum. (CVE-2020-14001)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Update the affected kramdown and / or ruby-kramdown packages.See Also
Plugin Details
Severity: Critical
ID: 141922
File Name: ubuntu_USN-4562-2.nasl
Version: 1.4
Type: local
Agent: unix
Family: Ubuntu Local Security Checks
Published: 10/27/2020
Updated: 1/17/2023
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.9
CVSS v2
Risk Factor: High
Base Score: 7.5
Temporal Score: 5.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS Score Source: CVE-2020-14001
CVSS v3
Risk Factor: Critical
Base Score: 9.8
Temporal Score: 8.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:canonical:ubuntu_linux:20.10, p-cpe:/a:canonical:ubuntu_linux:kramdown, p-cpe:/a:canonical:ubuntu_linux:ruby-kramdown
Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release
Exploit Ease: No known exploits are available
Patch Publication Date: 10/26/2020
Vulnerability Publication Date: 7/17/2020
Reference Information
CVE: CVE-2020-14001
USN: 4562-2