Debian Security Advisory
DSA-3900-1 openvpn -- security update
- Date Reported:
- 27 Jun 2017
- Affected Packages:
- openvpn
- Vulnerable:
- Yes
- Security database references:
- In the Debian bugtracking system: Bug 865480.
In Mitre's CVE dictionary: CVE-2017-7479, CVE-2017-7508, CVE-2017-7520, CVE-2017-7521. - More information:
-
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.
- CVE-2017-7479