Certificate Validation Bypass in GnuTLS Affected by Remote Attacks
CVE-2016-7444

7.5HIGH

Key Information:

Vendor
Gnu
Status
Gnutls
Vendor
CVE Published:
27 September 2016

Summary

The gnutls_ocsp_resp_check_crt function in GnuTLS versions prior to 3.4.15 and 3.5.x before 3.5.4 does not effectively verify the serial length of an OCSP response. This oversight could allow remote attackers to bypass intended certificate validation mechanisms, potentially exploiting trailing bytes left by gnutls_malloc to compromise the security of applications relying on this library.

References

http://www.securityfocus.com/bid/92893
vdb-entryx_refsource_BID
https://gitlab.com/gnutls/gnutls/commit/964632f37dfdfb914...
x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2017:2292
vendor-advisoryx_refsource_REDHAT

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.