CVE-2015-0834

Mozilla: TLS TURN and STUN connections silently fail to simple TCP connections (MFSA 2015-15)

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Severity

Moderate

Red Hat Product Security

4.3

CVSS 2.0

Review impact separately from score.

Published · February 24, 2015

Updated · November 21, 2025

Description

The WebRTC subsystem in Mozilla Firefox before 36.0 recognizes turns: and stuns: URIs but accesses the TURN or STUN server without using TLS, which makes it easier for man-in-the-middle attackers to discover credentials by spoofing a server and completing a brute-force attack within a short time window.

Statement

This issue does not affect the version of firefox and thunderbird as shipped with Red Hat Enterprise Linux 5, 6 and 7.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 2.0 · 4.3
AV:N/AC:M/Au:N/C:N/I:P/A:N

CWE-319 · Cleartext Transmission of Sensitive Information