Rapid7 Vulnerability & Exploit Database

TLS/SSL Timing Side-Channel Attacks, aka the "Lucky Thirteen" Attack

Back to Search

TLS/SSL Timing Side-Channel Attacks, aka the "Lucky Thirteen" Attack

Severity
3
CVSS
(AV:N/AC:H/Au:N/C:P/I:N/A:N)
Published
02/08/2013
Created
07/25/2018
Added
09/30/2015
Modified
12/12/2017

Description

The TLS protocol 1.1 and 1.2 and the DTLS protocol 1.0 and 1.2, as used in OpenSSL, OpenJDK, PolarSSL, and other products, do not properly consider timing side-channel attacks on a MAC check requirement during the processing of malformed CBC padding, which allows remote attackers to conduct distinguishing attacks and plaintext-recovery attacks via statistical analysis of timing data for crafted packets, aka the "Lucky Thirteen" issue. The attack is also possible on implementations of SSL 3.0 and TLS 1.0 that incorporate countermeasures to previous padding oracle attacks. Variant attacks may also apply to non-compliant implementations.

As it is not possible to determine whether a specific SSL product, or if a vulnerable version of such a product is active on the endpoint, all SSL endpoints running CBC cipher suites are flagged as potentially vulnerable; as such they should be investigated by the end user.

Solution(s)

  • ssl-disable-cbc-ciphers

References

  • ssl-disable-cbc-ciphers

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;