CVE-2018-0732

high

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).

References

https://www.tenable.com/security/tns-2018-17

https://www.tenable.com/security/tns-2018-14

https://www.tenable.com/security/tns-2018-13

https://www.tenable.com/security/tns-2018-12

https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html

https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.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/security-alerts/cpujan2021.html

https://www.oracle.com/security-alerts/cpuapr2020.html

https://www.debian.org/security/2018/dsa-4355

https://www.debian.org/security/2018/dsa-4348

https://usn.ubuntu.com/3692-2/

https://usn.ubuntu.com/3692-1/

https://securityadvisories.paloaltonetworks.com/Home/Detail/133

https://security.netapp.com/advisory/ntap-20190118-0002/

https://security.netapp.com/advisory/ntap-20181105-0001/

https://security.gentoo.org/glsa/201811-03

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBEV5QGDRFUZDMNECFXUSN5FMYOZDE4V/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y3IVFGSERAZLNJCK35TEM2R4726XIH3Z/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EWC42UXL5GHTU5G77VKBF6JYUUNGSHOM/

https://lists.debian.org/debian-lts-announce/2018/07/msg00043.html

https://cert-portal.siemens.com/productcert/pdf/ssa-419820.pdf

https://access.redhat.com/errata/RHSA-2019:1543

https://access.redhat.com/errata/RHSA-2019:1297

https://access.redhat.com/errata/RHSA-2019:1296

https://access.redhat.com/errata/RHSA-2018:3505

https://access.redhat.com/errata/RHSA-2018:3221

https://access.redhat.com/errata/RHSA-2018:2553

https://access.redhat.com/errata/RHSA-2018:2552

http://www.securitytracker.com/id/1041090

http://www.securityfocus.com/bid/104442

http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html

https://documentation.solarwinds.com/en/success_center/orionplatform/content/release_notes/solarwinds_platform_2024-2_release_notes.htm#link5

https://www.openssl.org/news/secadv/20180612.txt

https://nodejs.org/en/blog/vulnerability/august-2018-security-releases/

https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=ea7abeeabf92b7aca160bdd0208636d4da69f4f4

https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=3984ef0b72831da8b3ece4745cac4f8575b19098

Details

Source: Mitre, NVD

Published: 2018-06-12

Updated: 2024-11-21

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High

EPSS

EPSS: 0.81092