CVE-2018-0732
HIGH7.5EPSS 78.4%openssl1.0 - security update
Published: 6/12/2018Modified: 4/28/2026
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).
Affected packages (6)
- Alpine/libresslfrom 0, < 2.7.4-r0
- Alpine/opensslfrom 0, < 1.0.2o-r1
- Debian/opensslfrom 0, < 1.1.1-1
- Debian/opensslfrom 0, < 1.0.1t-1+deb8u9
- Debian/opensslfrom 0, < 1.1.0j-1~deb9u1
- Debian/openssl1.0from 0, < 1.0.2q-1~deb9u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |