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Category:   Application (Security)  >   libtASN1 Vendors:   gnutls.org
libtASN1 Heap Over-read in _asn1_extract_der_octet() Lets Remote Users Deny Service
SecurityTracker Alert ID:  1032246
SecurityTracker URL:  http://securitytracker.com/id/1032246
CVE Reference:   CVE-2015-3622   (Links to External Site)
Date:  May 5 2015
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): prior to 4.5
Description:   A vulnerability was reported in libtASN1. A remote user can cause denial of service conditions on the target system.

A remote user can supply a specially crafted certificate to trigger a heap over-read in _asn1_extract_der_octet() and cause the target application to crash.

The vendor was notified on April 16, 2015.

The original advisory is available at:

https://blog.fuzzing-project.org/9-Heap-overflow-invalid-read-in-Libtasn1-TFPA-0052015.html

Hanno Bock reported this vulnerability.

Impact:   A remote user can cause the target application to crash.
Solution:   The vendor has issued a fix (4.5).

The vendor's advisory is available at:

https://lists.gnu.org/archive/html/help-libtasn1/2015-04/msg00000.html

Vendor URL:  www.gnu.org/software/libtasn1/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Aug 1 2017 (Red Hat Issues Fix) libtASN1 Heap Over-read in _asn1_extract_der_octet() Lets Remote Users Deny Service
Red Hat has issued a fix for Red Hat Enterprise Linux 7.



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