CVE-2015-0799

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2015-04-08 · updated 2026-06-17
Weakness: CWE-20

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.

Affected products

Canonical Ubuntu Linux: 12.04, 14.04, 14.10
Mozilla Firefox: through 37.0
Opensuse: 13.1, 13.2

References

http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00003.html
http://www.mozilla.org/security/announce/2015/mfsa2015-44.html
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://www.securitytracker.com/id/1032030
http://www.ubuntu.com/usn/USN-2557-1
https://bugzilla.mozilla.org/show_bug.cgi?id=1148328
https://security.gentoo.org/glsa/201512-10
http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00003.html
http://www.mozilla.org/security/announce/2015/mfsa2015-44.html
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://www.securitytracker.com/id/1032030
http://www.ubuntu.com/usn/USN-2557-1

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