CVE-2018-0732
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).
- Score
- CVSS 3.1 7.5 High
- Status
- Modified - openssl-security@openssl.org
- Published
- 2018-06-12
- Last modified
- 2026-10-08
- Weaknesses
- CWE-320
Affected products
References
- https://lists.debian.org/debian-lts-announce/2018/07/msg00043.html
- http://www.securityfocus.com/bid/104442
- https://www.debian.org/security/2018/dsa-4355
- https://access.redhat.com/errata/RHSA-2018:2552
- https://security.gentoo.org/glsa/201811-03
- https://usn.ubuntu.com/3692-2/
- https://access.redhat.com/errata/RHSA-2018:2553
- https://access.redhat.com/errata/RHSA-2018:3505
- https://usn.ubuntu.com/3692-1/
- https://access.redhat.com/errata/RHSA-2018:3221
- https://www.debian.org/security/2018/dsa-4348
- http://www.securitytracker.com/id/1041090
- https://access.redhat.com/errata/RHSA-2019:1297
- https://access.redhat.com/errata/RHSA-2019:1296
- https://access.redhat.com/errata/RHSA-2019:1543
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EWC42UXL5GHTU5G77VKBF6…
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBEV5QGDRFUZDMNECFXUSN…
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y3IVFGSERAZLNJCK35TEM2…
- 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
