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CVE-2017-7520

Status Candidate

Overview

OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to denial-of-service and/or possibly sensitive memory leak triggered by man-in-the-middle attacker.

Related Files

Ubuntu Security Notice USN-3339-2
Posted Aug 7, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3339-2 - USN-3339-1 fixed several issues in OpenVPN. This update provides the corresponding update for Ubuntu 12.04 ESM. A Guido Vranken discovered that OpenVPN incorrectly handled an HTTP A proxy with NTLM authentication. A remote attacker could use this issue A to cause OpenVPN clients to crash, resulting in a denial of service, A or possibly expose sensitive memory contents. Various other issues were also addressed.

tags | advisory, remote, web, denial of service
systems | linux, ubuntu
advisories | CVE-2017-7520
MD5 | 23d76828be8a9431e15c3e3524bca1ee
Debian Security Advisory 3900-1
Posted Jun 28, 2017
Authored by Debian | Site debian.org

Debian Linux Security Advisory 3900-1 - Several issues were discovered in openvpn, a virtual private network application.

tags | advisory
systems | linux, debian
advisories | CVE-2017-7479, CVE-2017-7508, CVE-2017-7520, CVE-2017-7521
MD5 | 861615706841885d4df680f3df668402
Ubuntu Security Notice USN-3339-1
Posted Jun 22, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3339-1 - Karthikeyan Bhargavan and Gaetan Leurent discovered that 64-bit block ciphers are vulnerable to a birthday attack. A remote attacker could possibly use this issue to recover cleartext data. Fixing this issue requires a configuration change to switch to a different cipher. This update adds a warning to the log file when a 64-bit block cipher is in use. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. It was discovered that OpenVPN incorrectly handled rollover of packet ids. An authenticated remote attacker could use this issue to cause OpenVPN to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2016-6329, CVE-2017-7479, CVE-2017-7508, CVE-2017-7512, CVE-2017-7520, CVE-2017-7521
MD5 | d3cafbb3d6cf1f0190409317b5d44266
Slackware Security Advisory - openvpn Updates
Posted Jun 22, 2017
Authored by Slackware Security Team | Site slackware.com

Slackware Security Advisory - New openvpn packages are available for Slackware 13.0, 13.1, 13.37, 14.0, 14.1, 14.2, and -current to fix security issues.

tags | advisory
systems | linux, slackware
advisories | CVE-2017-7508, CVE-2017-7512, CVE-2017-7520, CVE-2017-7521, CVE-2017-7522
MD5 | cbfc8242ea06a8baac440b5d71ba2960
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