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Advisory severityMedium4.3Red Hat Linux

Medium [CVE-2018-0732] Client DoS due to large DH parameter

This medium-severity Red Hat Linux advisory covers CVE-2018-0732 affecting JBoss Core Services Apache HTTP Server 2.4.29 SP2, JBoss Core Services on RHEL 6, JBoss Core Services on RHEL 7.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2018-0732 Source published Source updated

VulniPulse record published

CVE-2018-0732
Affected products & platforms
Red Hat LinuxRed Hat Enterprise Linux
Open source advisory

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Summary

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).

Red Hat severity: Moderate — CVSS 4.3 (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L). Weakness: CWE-325.

Affected Red Hat products: JBoss Core Services Apache HTTP Server 2.4.29 SP2; JBoss Core Services on RHEL 6; JBoss Core Services on RHEL 7; Red Hat Enterprise Linux 7; Red Hat OpenShift Application Runtimes Node.js 10; Red Hat OpenShift Application Runtimes Node.js 8; Red Hat Enterprise Linux 5; Red Hat Enterprise Linux 6; Red Hat JBoss Enterprise Application Platform 5; Red Hat JBoss Enterprise Application Platform 6; Red Hat JBoss Enterprise Web Server 2; Red Hat JBoss Web Server 3.

Red Hat lists Red Hat Enterprise Linux 8 as not affected. Will not fix / out of support: Red Hat Enterprise Linux 5; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat JBoss Enterprise Application Platform 5; Red Hat JBoss Enterprise Application Platform 6; Red Hat JBoss Enterprise Web Server 2.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Fixed versions
  • 1.1.0-1
  • 1.0.2-1
  • openssl
  • jbcs-httpd24-httpd-0:2.4.29-40.jbcs.el6
  • jbcs-httpd24-openssl-1:1.0.2n-15.jbcs.el6
  • jbcs-httpd24-httpd-0:2.4.29-40.jbcs.el7
  • jbcs-httpd24-openssl-1:1.0.2n-15.jbcs.el7
  • openssl-1:1.0.2k-16.el7
  • rhoar-nodejs-1:10.9.0-1.el7
  • rhoar-nodejs-1:8.11.4-2.el7
  • RHSA-2019:1296
  • RHSA-2019:1543
  • RHSA-2019:1297
  • RHSA-2018:3221
  • RHSA-2018:2553
  • RHSA-2018:2552

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Mitigation

Upgrade to a fixed release: 1.1.0-1, 1.0.2-1, openssl, jbcs-httpd24-httpd-0:2.4.29-40.jbcs.el6, jbcs-httpd24-openssl-1:1.0.2n-15.jbcs.el6, jbcs-httpd24-httpd-0:2.4.29-40.jbcs.el7. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Discussion(0)

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