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Debian Security Advisory 3900-1

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

Debian Security Advisory 3900-1

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- -------------------------------------------------------------------------
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
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