Auth bypass in Prosody
CVE-2021-32917
An issue was discovered in Prosody before 0.11.9. The proxy65 component allows open access by default, even if neither of the users has an XMPP account on the local server, allowing unrestricted use of the server's bandwidth.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.022 (81.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 81.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000
Affected products
- Prosody
- Debian Linux — versions 9.0, 10.0
- Fedoraproject Fedora — versions 32, 33, 34
Weakness classification (CWE)
Public proof-of-concept exploits
References
- blog.prosody.im/prosody-0.11.9-released/ (Release Notes, Vendor Advisory)
- www.openwall.com/lists/oss-security/2021/05/13/1 (mailing-list, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2021/05/14/2 (mailing-list, Mailing List, Third Party Advisory, Mitigation)
- www.debian.org/security/2021/dsa-4916 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.gentoo.org/glsa/202105-15 (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/06/msg00016.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-32917?
- CVE-2021-32917 is a medium-severity vulnerability in Prosody, classified under Missing Authorization. CVSS score: 5.3/10. Published 2021-05-13.
- How severe is CVE-2021-32917?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2021-32917 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.