CVE Database›CVE-2015-2808

CVE-2015-2808

SSL/TLS: "Invariance Weakness" vulnerability in RC4 stream cipher

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Severity

Moderate

Red Hat Product Security

4.3

CVSS 2.0

Review impact separately from score.

Published · March 30, 2015

Updated · June 28, 2026

Description

The RC4 algorithm, as used in the TLS protocol and SSL protocol, does not properly combine state data with key data during the initialization phase, which makes it easier for remote attackers to conduct plaintext-recovery attacks against the initial bytes of a stream by sniffing network traffic that occasionally relies on keys affected by the Invariance Weakness, and then using a brute-force approach involving LSB values, aka the "Bar Mitzvah" issue.

Statement

This flaw is related to the design of the RC4 protocol and not its implementation. Therefore there are no plans to correct this issue in Red Hat Enterprise Linux 5, 6 and 7. Future updates may disable the use of RC4 in various components.

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:P/I:N/A:N

CWE not specified