- -------------------------------------------------------------------------
Debian Security Advisory DSA-3900-1                   security@debian.org
https://www.debian.org/security/                       Sebastien Delafond
June 27, 2017                         https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package        : openvpn
CVE ID         : CVE-2017-7479 CVE-2017-7508 CVE-2017-7520 CVE-2017-7521
Debian Bug     : 865480

Several issues were discovered in openvpn, a virtual private network
application.

CVE-2017-7479

    It was discovered that openvpn did not properly handle the
    rollover of packet identifiers. This would allow an authenticated
    remote attacker to cause a denial-of-service via application
    crash.

CVE-2017-7508

    Guido Vranken discovered that openvpn did not properly handle
    specific malformed IPv6 packets. This would allow a remote
    attacker to cause a denial-of-service via application crash.

CVE-2017-7520

    Guido Vranken discovered that openvpn did not properly handle
    clients connecting to an HTTP proxy with NTLMv2
    authentication. This would allow a remote attacker to cause a
    denial-of-service via application crash, or potentially leak
    sensitive information like the user's proxy password.

CVE-2017-7521

    Guido Vranken discovered that openvpn did not properly handle
    some x509 extensions. This would allow a remote attacker to cause
    a denial-of-service via application crash.

For the oldstable distribution (jessie), these problems have been fixed
in version 2.3.4-5+deb8u2.

For the stable distribution (stretch), these problems have been fixed in
version 2.4.0-6+deb9u1.

For the testing distribution (buster), these problems have been fixed
in version 2.4.3-1.

For the unstable distribution (sid), these problems have been fixed in
version 2.4.3-1.

We recommend that you upgrade your openvpn packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org

Debian: DSA-3900-1: openvpn security update

June 27, 2017
Several issues were discovered in openvpn, a virtual private network application

Summary

CVE-2017-7479

It was discovered that openvpn did not properly handle the
rollover of packet identifiers. This would allow an authenticated
remote attacker to cause a denial-of-service via application
crash.

CVE-2017-7508

Guido Vranken discovered that openvpn did not properly handle
specific malformed IPv6 packets. This would allow a remote
attacker to cause a denial-of-service via application crash.

CVE-2017-7520

Guido Vranken discovered that openvpn did not properly handle
clients connecting to an HTTP proxy with NTLMv2
authentication. This would allow a remote attacker to cause a
denial-of-service via application crash, or potentially leak
sensitive information like the user's proxy password.

CVE-2017-7521

Guido Vranken discovered that openvpn did not properly handle
some x509 extensions. This would allow a remote attacker to cause
a denial-of-service via application crash.

For the oldstable distribution (jessie), these problems have been fixed
in version 2.3.4-5+deb8u2.

For the stable distribution (stretch), these problems have been fixed in
version 2.4.0-6+deb9u1.

For the testing distribution (buster), these problems have been fixed
in version 2.4.3-1.

For the unstable distribution (sid), these problems have been fixed in
version 2.4.3-1.

We recommend that you upgrade your openvpn packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org

Severity
Several issues were discovered in openvpn, a virtual private network
application.

Related News

30.Lock Globe Motherboard Esm H320
1 - 2 min read
The SPDX 3.0 release marks a significant milestone in software management, particularly for Linux admins, infosec professionals, internet security
11.Locks IsometricPattern Esm H320
2 - 3 min read
Open Source maintainers and developers have been warned about the continued wave of attacks aimed at project maintainers similar to those recently
28.Lock Globe Esm H320
1 - 2 min read
A resurgence of cyberattacks targeting Linux systems in Asian campaigns through the utilization of the Pupy Remote Access Trojan (RAT) has been
27.Tablet Connections Blocks Lock Esm H320
2 - 4 min read
Canonical has recently announced the Beta release of Ubuntu Linux 24.04 LTS , codenamed "Noble Numbat." This release aims to continue Ubuntu's
21.Globe RadiatingCode Esm H320
2 - 3 min read
The open-source movement has come a long way, from its origins in the 1960s and 1970s to becoming an integral part of organizations worldwide.
13.Lock StylizedMotherboard Esm H320
2 - 3 min read
The Rust-based Edera project demonstrates a unique approach to container security that addresses cloud-native computing challenges. Let's examine
8.Locks HexConnections CodeGlobe Esm H320
2 - 3 min read
Canonical has launched Ubuntu Pro for Devices , a comprehensive offering emphasizing security and compliance for IoT device deployments. This
2.Motherboard Esm H320
2 - 3 min read
The recently uncovered "Native Branch History Injection (BHI)" exploit against the Linux kernel marks a significant milestone in the ongoing battle