SSL / TLS Renegotiation Handshakes MiTM Plaintext Data Injection
medium Nessus Plugin ID 42880
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Synopsis
The remote service allows insecure renegotiation of TLS / SSL connections.Description
The remote service encrypts traffic using TLS / SSL but allows a client to insecurely renegotiate the connection after the initial handshake.An unauthenticated, remote attacker may be able to leverage this issue to inject an arbitrary amount of plaintext into the beginning of the application protocol stream, which could facilitate man-in-the-middle attacks if the service assumes that the sessions before and after renegotiation are from the same 'client' and merges them at the application layer.
Solution
Contact the vendor for specific patch information.See Also
http://www.ietf.org/mail-archive/web/tls/current/msg03948.html
Plugin Details
Severity: Medium
ID: 42880
File Name: ssl_renegotiation.nasl
Version: 1.48
Type: remote
Family: General
Published: 11/24/2009
Updated: 6/12/2020
Dependencies: ssl_supported_versions.nasl
Risk Information
VPR
Risk Factor: Medium
Score: 6
CVSS v2
Risk Factor: Medium
Base Score: 5.8
Temporal Score: 4.5
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:P
Temporal Vector: E:POC/RL:OF/RC:C
Vulnerability Information
Required KB Items: SSL/Supported
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 11/5/2009
Vulnerability Publication Date: 11/4/2009
Reference Information
CVE: CVE-2009-3555
BID: 36935