VULNERABILITY INTELLIGENCE
CVE-2018-0732
CVSS score7.5 HIGH
EPSS probability48.83%
CISA KEVNot currently listed
Published2018-06-12
Last modified2026-10-08
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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).
Primary references
- openssl-security@openssl.org — Patch, Third Party Advisory
- openssl-security@openssl.org — Third Party Advisory, VDB Entry
- openssl-security@openssl.org — Third Party Advisory, VDB Entry
- openssl-security@openssl.org — Third Party Advisory
- openssl-security@openssl.org — Third Party Advisory
- openssl-security@openssl.org — Third Party Advisory
- openssl-security@openssl.org — Third Party Advisory
- openssl-security@openssl.org — Third Party Advisory
- openssl-security@openssl.org — Third Party Advisory
- openssl-security@openssl.org — Third Party Advisory
- openssl-security@openssl.org — Third Party Advisory
- openssl-security@openssl.org