SSL: OpenSSL ssl_get_algorithm2 TLS Denial of Service
This signature detects attempts to exploit a known vulnerability in OpenSSL. The vulnerability is due to an error in ssl_get_algorithms2() where the SSL/TLS version is obtained from an incorrect structure leading to a NULL pointer dereference when computing a message digest. A remote unauthenticated attacker can exploit this vulnerability to cause a denial of service condition on applications that use the vulnerable version of the OpenSSL library.
Extended Description
The ssl_get_algorithm2 function in ssl/s3_lib.c in OpenSSL before 1.0.2 obtains a certain version number from an incorrect data structure, which allows remote attackers to cause a denial of service (daemon crash) via crafted traffic from a TLS 1.2 client.
Affected Products
Openssl openssl
Short Name
SSL:OPENSSL-TLS-DOS
Severity
Major
Recommended
False
Recommended Action
Drop
Category
SSL
Keywords
CVE-2013-6449 Denial OpenSSL Service TLS bid:64530 of ssl_get_algorithm2
Release Date
03/20/2014
Supported Platforms
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3
Sigpack Version
3650
False Positive
Unknown
Vendors
Openssl
CVSS Score
4.3