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ubuntucveUbuntu.comUB:CVE-2020-14001
HistoryJul 17, 2020 - 12:00 a.m.

CVE-2020-14001

2020-07-1700:00:00
ubuntu.com
ubuntu.com
16
kramdown gem
ruby
unintended read access
embedded ruby code execution
jekyll
gitlab pages
github pages
thredded forum

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.013

Percentile

86.2%

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.

Bugs

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.013

Percentile

86.2%