Vulnerability in Prosody
CVE-2021-32919
An issue was discovered in Prosody before 0.11.9. The undocumented dialback_without_dialback option in mod_dialback enables an experimental feature for server-to-server authentication. It does not correctly authenticate remote server certificates, allowing a remote server to impersonate another server (when this option is enabled).
Vulnerability class: Improper Certificate Validation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.014 (71.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000
Affected products
- Prosody
- Debian Linux — versions 10.0
- Fedoraproject Fedora — versions 32, 33, 34
Weakness classification (CWE)
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)
Frequently asked questions
- What is CVE-2021-32919?
- CVE-2021-32919 is a high-severity vulnerability in Prosody, classified under Improper Certificate Validation. CVSS score: 7.5/10. Published 2021-05-13.
- How severe is CVE-2021-32919?
- High severity. CVSS v3 base score is 7.5 out of 10.