Home/CVE/CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.
CVE

CVE-2020-24916

CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.

CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.

CRITICAL · CVSS 9.8 EPSS 0.44255
Act now
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 2% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
▤

Affected Products & Versions

3
yaws>= 1.81 and <= 2.0.7
canonical ubuntu linuxall versions
debian linuxall versions
⚠

Public Exploits & PoCs

3
pocgithub.com · poc-yaws-cgi-shell-injectiongithub.com
pocpacketstormsecurity.com · Yaws-2.0.7-XML-Injection-Command-Injection.htmlpacketstormsecurity.com
pocvuln.be · yaws-xxe-and-shell-injectionsvuln.be
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 Sep 2020 · 07:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

1
usnUSN-4569-1
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/erlyaws/yaws/commits/masterPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/09/msg00022.htmlMailing ListThird Party Advisory
https://usn.ubuntu.com/4569-1/Third Party Advisory
https://www.debian.org/security/2020/dsa-4773Third Party Advisory
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