GnuTLS libtasn1 ASN1 Length Fields Buffer Overflow (CVE-2012-1569)
|Check Point Reference:||CPAI-2012-292|
|Protection Provided by:||
Who is Vulnerable?
Free Software Foundation Libtasn1 Prior to 2.12
A buffer overflow vulnerability has been reported in libtasn1, a component of GnuTLS.
The vulnerability is due to an error in the libtasn1 library while handling length fields within the ASN.1 fields. A remote attacker can exploit this vulnerability by sending specially crafted certificates to the target service. Successful exploitation would allow an attacker to execute arbitrary code in the security context of the affected service. An exploitation attempt may also cause the service to crash, resulting in a denial of service condition.
This protection will detect and block attempts to exploit this vulnerability.
In order for the protection to be activated, update your product to the latest update. For information on how to update , go to SBP-2006-05, Protection tab and select the version of your choice.
To configure the defense, select your product from the list below and follow the related protection steps.
Security Gateway R75 / R71 / R70
How Can I Protect My Network?
- In the IPS tab, click Protections and find the GnuTLS libtasn1 ASN1 Length Fields Buffer Overflow protection using the Search tool and Edit the protection's settings.
- Install policy on all modules.
How Do I Know if My Network is Under Attack?
SmartView Tracker will log the following entries:
Attack Name: OpenSSL Enforcement Violation
Attack Information: GnuTLS libtasn1 ASN1 Length Fields Buffer Overflow