SB2017021604 - Remote denial of service during Encrypt-Then-Mac renegotiation in OpenSSL
Published: February 16, 2017
Security Bulletin ID
SB2017021604
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper input validation (CVE-ID: CVE-2017-3733)
The vulnerability allows a remote attacker to cause denial of service.
The vulnerability exists due to improper input validation during a renegotiation handshake, if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake. A remote attacker can send a specially crafted data to vulnerable application and case denial of service conditions.
Successful exploitation of the vulnerability may result in denial of service (DoS) attack.
Remediation
Install update from vendor's website.