CVE-2021-32920

HIGH
Published May 13, 20215y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published May 13, 2021 5y ago
Last Modified Jun 17, 2026 2w ago

Description

Prosody before 0.11.9 allows Uncontrolled CPU Consumption via a flood of SSL/TLS renegotiation requests.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
No Patch Available

Affected Products 5

VendorProductVersionRange
prosodyprosody* <0.11.9
debiandebian_linux10.0any
fedoraprojectfedora32any
fedoraprojectfedora33any
fedoraprojectfedora34any

References 8

  • openwall.com http://www.openwall.com/lists/oss-security/2021/05/13/1
    Mailing ListThird Party Advisory
  • openwall.com http://www.openwall.com/lists/oss-security/2021/05/14/2
    Mailing ListMitigationThird Party Advisory
  • blog.prosody.im https://blog.prosody.im/prosody-0.11.9-released/
    Release NotesVendor Advisory
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6MFFBZWXKPZEVZNQSVJNCUE7WRF3T7DG/
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GUN63AHEWB2WRROJHU3BVJRWLONCT2B7/
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LWJ2DG2DFJOEFEWOUN26IMYYWGSA2ZEE/
  • security.gentoo.org https://security.gentoo.org/glsa/202105-15
    Third Party Advisory
  • debian.org https://www.debian.org/security/2021/dsa-4916
    Third Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.