XXE in Yaws
CVE-2020-24379
WebDAV implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to XXE injection.
Vulnerability class: XXE (XML External Entity)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.034 (88.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.034 · newest: 0.034 · change: 0.000
Affected products
- Yaws
- Canonical Ubuntu Linux — versions 18.04
- Debian Linux — versions 9.0, 10.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/erlyaws/yaws/commits/master (Patch, Third Party Advisory)
- packetstormsecurity.com/files/159106/Yaws-2.0.7-XML-Injection-Command-Injection… (Exploit, VDB Entry, Third Party Advisory)
- vuln.be/post/yaws-xxe-and-shell-injections/ (Third Party Advisory, Broken Link)
- github.com/vulnbe/poc-yaws-dav-xxe (Exploit, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/09/msg00022.html (mailing-list, Mailing List, Third Party Advisory)
- usn.ubuntu.com/4569-1/ (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2020/dsa-4773 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-24379?
- CVE-2020-24379 is a critical-severity vulnerability in Yaws, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 9.8/10. Published 2020-09-09.
- How severe is CVE-2020-24379?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2020-24379 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.