Resource Exhaustion Affecting openssl package, versions <3.0.2-0ubuntu1.16
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Test your applications- Snyk ID SNYK-UBUNTU2204-OPENSSL-5538123
- published 31 May 2024
- disclosed 14 Nov 2022
Introduced: 14 Nov 2022
CVE-2022-40735 Open this link in a new tabHow to fix?
Upgrade Ubuntu:22.04 openssl to version 3.0.2-0ubuntu1.16 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu.
See How to fix? for Ubuntu:22.04 relevant fixed versions and status.
The Diffie-Hellman Key Agreement Protocol allows use of long exponents that arguably make certain calculations unnecessarily expensive, because the 1996 van Oorschot and Wiener paper found that "(appropriately) short exponents" can be used when there are adequate subgroup constraints, and these short exponents can lead to less expensive calculations than for long exponents. This issue is different from CVE-2002-20001 because it is based on an observation about exponent size, rather than an observation about numbers that are not public keys. The specific situations in which calculation expense would constitute a server-side vulnerability depend on the protocol (e.g., TLS, SSH, or IKE) and the DHE implementation details. In general, there might be an availability concern because of server-side resource consumption from DHE modular-exponentiation calculations. Finally, it is possible for an attacker to exploit this vulnerability and CVE-2002-20001 together.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2022-40735
- https://dheatattack.gitlab.io/
- https://gist.github.com/c0r0n3r/9455ddcab985c50fd1912eabf26e058b
- https://github.com/mozilla/ssl-config-generator/issues/162
- https://ieeexplore.ieee.org/document/10374117
- 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://raw.githubusercontent.com/CVEProject/cvelist/9d7fbbcabd3f44cfedc9e8807757d31ece85a2c6/2022/40xxx/CVE-2022-40735.json
- 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://www.rfc-editor.org/rfc/rfc3526
- https://www.rfc-editor.org/rfc/rfc4419
- https://www.rfc-editor.org/rfc/rfc5114#section-4
- https://www.rfc-editor.org/rfc/rfc7919#section-5.2