Resource exhaustion in Prosody - CVE-2021-32920
Published: May 17, 2021
Vulnerability identifier: #VU53312
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-32920
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can trigger resource exhaustion via a flood of SSL/TLS renegotiation requests and perform a denial of service (DoS) attack.
Affected software
Prosody
Gentoo Linux
Arch Linux
Fedora
prosody (Debian package)
prosody
Gentoo Linux
Arch Linux
Fedora
prosody (Debian package)
prosody
How to mitigate CVE-2021-32920
Install updates from vendor's website.
Prosody - update to 0.11.9
prosody (Debian package) - update to 0.11.2-1+deb10u1
prosody - addressed in versions 0.11.9-1.el7, 0.11.9-1.el8, 0.11.9-1.fc32, 0.11.9-1.fc33, 0.11.9-1.fc34
prosody (Debian package) - update to 0.11.2-1+deb10u1
prosody - addressed in versions 0.11.9-1.el7, 0.11.9-1.el8, 0.11.9-1.fc32, 0.11.9-1.fc33, 0.11.9-1.fc34