CVE-2018-0732
Client DoS due to large DH parameter
- State
- Published
- Severity
- Not scored
- Published
- Jun 12, 2018
- Updated
- Oct 8, 2026
- Reserved
- Nov 30, 2017
Description
During key agreement in a TLS handshake using a DH(E) based ciphersuite a malicious server can send a very large prime value to the client. This will cause the client to spend an unreasonably long period of time generating a key for this prime resulting in a hang until the client has finished. This could be exploited in a Denial Of Service attack. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o).
Scores
The record has no CVSS score.
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
OpenSSLOpenSSL |
|
References
- [debian-lts-announce] 20180728 [SECURITY] [DLA 1449-1] openssl security updatemailing-list
- 104442vdb-entry
- DSA-4355vendor-advisory
- RHSA-2018:2552vendor-advisory
- GLSA-201811-03vendor-advisory
- USN-3692-2vendor-advisory
- RHSA-2018:2553vendor-advisory
- RHSA-2018:3505vendor-advisory
- USN-3692-1vendor-advisory
- RHSA-2018:3221vendor-advisory
- DSA-4348vendor-advisory
- 1041090vdb-entry
- RHSA-2019:1297vendor-advisory
- RHSA-2019:1296vendor-advisory
- RHSA-2019:1543vendor-advisory
- FEDORA-2019-db06efdea1vendor-advisory
- FEDORA-2019-00c25b9379vendor-advisory
- FEDORA-2019-9a0a7c0986vendor-advisory
- https://www.oracle.com/security-alerts/cpuapr2020.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- https://www.oracle.com/security-alerts/cpujan2021.html
- https://www.tenable.com/security/tns-2018-14
- https://securityadvisories.paloaltonetworks.com/Home/Detail/133
- https://www.tenable.com/security/tns-2018-13
- https://www.tenable.com/security/tns-2018-17
- https://www.tenable.com/security/tns-2018-12
- https://security.netapp.com/advisory/ntap-20181105-0001/
- https://nodejs.org/en/blog/vulnerability/august-2018-security-releases/
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=3984ef0b72831da8b3ece4745cac4f8575b19098
- https://www.openssl.org/news/secadv/20180612.txt
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=ea7abeeabf92b7aca160bdd0208636d4da69f4f4
- https://security.netapp.com/advisory/ntap-20190118-0002/
- https://cert-portal.siemens.com/productcert/pdf/ssa-419820.pdf
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