libcurl GnuTLS weak security
| libcurl-gnutls-weak-security (35479) |  Low Risk |
Description:
libcurl could provide weaker than expected security. The GnuTLS certificate implementation used by libcurl does not properly verify certificates. If libcurl is built to use GnuTLS, an authenticated remote attacker could exploit this vulnerability to bypass security restrictions.
Note: Applications implementing libcurl are also affected by this vulnerability
*CVSS:
| Base Score: | 5.6 |
| Access Vector: | Remote |
| Access Complexity: | High |
| Authentication: | Not Required |
| Confidentiality Impact: | Partial |
| Integrity Impact: | Partial |
| Availability Impact: | Partial |
| Temporal Score: | 4.1 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Bypass Security
Remedy:
Refer to cURL Security Advisory (July 10, 2007) for patch, upgrade, or suggested workaround information. See References.
For Ubuntu Linux:
Refer to USN-484-1 for patch, upgrade, or suggested workaround information. See References.
For Debian GNU/Linux (libcurl3-gnutls):
Refer to DSA-1333-1 for patch, upgrade, or suggested workaround information. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
References:
- cURL Security Advisory (July 10, 2007): libcurl GnuTLS insufficient cert verification Vulnerability.
- BID-24938: Curl GnuTLS Certificate Verfication Access Validation Vulnerability
- CVE-2007-3564: libcurl 7.14.0 through 7.16.3, when built with GnuTLS support, does not check SSL/TLS certificate expiration or activation dates, which allows remote attackers to bypass certain access restrictions.
- DSA-1333: libcurl3-gnutls -- missing input validation
- SA26104: cURL/libcURL GnuTLS Security Issue
- USN-484-1: curl vulnerability
- VUPEN/ADV-2007-2551: cURL GnuTLS Certificate Verification Methods Security Bypass Weakness
Platforms Affected:
- Canonical Ubuntu 6.06 LTS
- Canonical Ubuntu 6.10
- Canonical Ubuntu 7.04
- cURL libcurl prior to 7.16.4
- Debian Debian Linux 4.0
Reported:
Jul 10, 2007
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For corrections or additions please email xforce@iss.net
* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.