#VU77321 Resource exhaustion in Diffie-Hellman key exchange - CVE-2022-40735
Published: June 14, 2023
Vulnerability identifier: #VU77321
Vulnerability risk: Medium
CVSSv4.0: 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/E:U/U:Green
CVE-ID: CVE-2022-40735
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Diffie-Hellman key exchange
Diffie-Hellman key exchange
Software vendor:
Diffie-Hellman key exchange
Diffie-Hellman key exchange
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to usage of unnecessarily expensive calculations. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.
Remediation
Install updates from vendor's website.
External links
- https://github.com/mozilla/ssl-config-generator/issues/162
- https://link.springer.com/content/pdf/10.1007/3-540-68339-9_29.pdf
- https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-57pt1r5.pdf
- https://www.researchgate.net/profile/Anton-Stiglic-2/publication/2401745_Security_Issues_in_the_Diffie-Hellman_Key_Agreement_Protocol/links/546c144f0cf20dedafd53e7e/Security-Issues-in-the-Diffie-Hellman-Key-Agreement-Protocol.pdf
- https://gist.github.com/c0r0n3r/9455ddcab985c50fd1912eabf26e058b
- https://www.rfc-editor.org/rfc/rfc4419
- https://www.rfc-editor.org/rfc/rfc7919#section-5.2
- https://www.rfc-editor.org/rfc/rfc3526
- https://raw.githubusercontent.com/CVEProject/cvelist/9d7fbbcabd3f44cfedc9e8807757d31ece85a2c6/2022/40xxx/CVE-2022-40735.json
- https://www.rfc-editor.org/rfc/rfc5114#section-4