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CVE-2017-7521

Status Candidate

Overview

OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to remote denial-of-service due to memory exhaustion caused by memory leaks and double-free issue in extract_x509_extension().

Related Files

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
SHA-256 | bf8347ff66079df80932f331596ee3113b769a47ba519e3bc4dca3d7a34bc4e6
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
SHA-256 | 18a5c77511e3ae26a7bfae4c9431f20c33fd11ad212e06d8a50e2ce03e855ef6
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
SHA-256 | c04ff34949106c7176237631c19551e85574da73ed1e5bfb2c4088214d52c98e
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