CVE-2015-0799 Security feature bypass in n/a

Medium 4.3 Published Updated

Man-in-the-middle attackers can bypass X.509 certificate verification in Firefox via HTTP/2 Alt-Svc headers, requiring user interaction.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
A user has to click or open something
Fix
Available

What is CVE-2015-0799?

CVE-2015-0799 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 8 Apr 2015. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

The HTTP Alternative Services feature in Mozilla Firefox before 37.0.1 allows man-in-the-middle attackers to bypass an intended X.509 certificate-verification step for an SSL server by specifying that server in the uri-host field of an Alt-Svc HTTP/2 response header.

Weakness: CWE-20

Which versions are affected by CVE-2015-0799?

It affects 3 products.

Products include Canonical Ubuntu Linux, Mozilla Firefox, Opensuse Opensuse.

How do I fix CVE-2015-0799?

Upgrade to a fixed version.

Is CVE-2015-0799 being exploited?

There is no known exploitation of CVE-2015-0799 in the wild and no public exploit code.

All Canonical Ubuntu Linux vulnerabilities

Sources

Also known as GHSA-5mp2-hvxf-rx92, UBUNTU-CVE-2015-0799, USN-2557-1.

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