OpenSSL ASN.1 inputs SSL client certificate denial of service
| openssl-asn1-sslclient-dos (43041) |  Low Risk |
Description:
OpenSSL is vulnerable to a denial of service caused by an integer overflow error when handling certain ASN.1 inputs. A remote attacker could exploit this vulnerability using a specially-crafted SSL client certificate to crash the application.
*CVSS:
| Base Score: | 3.5 |
| Access Vector: | Remote |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 2.6 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
Refer to OpenPKG-SA-2003.044 for patch, upgrade or suggested workaround information. See References.
For other distributions:
Apply the appropriate update for your system. See References.
References:
- CERT Advisory CA-2003-26: Multiple Vulnerabilities in SSL/TLS Implementations.
- IBM Support & downloads: Vulnerability Detected: 170.23.146.40:443 - OpenSSL Overflow Via Invalid Certificate Passing.
- OpenPKG-SA-2003.044: Cryptography and SSL/TLS Toolkit.
- Red Hat Bugzilla Bug 104893: CAN-2003-0543/0544 OpenSSL ASN.1 protocol crashes.
- BID-8732: OpenSSL ASN.1 Parsing Vulnerabilities
- CVE-2003-0544: OpenSSL 0.9.6 and 0.9.7 does not properly track the number of characters in certain ASN.1 inputs, which allows remote attackers to cause a denial of service (crash) via an SSL client certificate that causes OpenSSL to read past the end of a buffer when the long form is used.
- RHSA-2003-293: openssl security update
- SA22249: IBM Rational RequisitePro OpenSSL Vulnerability
- SUSE-SA:2003:043: openssl: remote denial-of-service
- US-CERT VU#380864: OpenSSL contains integer overflow handling ASN.1 tags (2)
- VUPEN/ADV-2006-3900: IBM Rational RequisitePro Security Update Fixes OpenSSL Buffer Overflow Issue
Platforms Affected:
- Novell SuSE Linux Enterprise Server 7.0
- OpenSSL OpenSSL 0.9.6
- OpenSSL OpenSSL 0.9.7
- SuSE SuSE eMail Server III
- SUSE SuSE Linux 7.2
- SUSE SuSE Linux 7.3
- SUSE SuSE Linux 8.0
- SUSE SuSE Linux 8.1
- SUSE SuSE Linux 8.2
- SUSE SuSE Linux 9.0
- SuSE SuSE Linux Connectivity Server
- SuSE SuSE Linux Database Server
- SuSE SuSE Linux Office Server
Reported:
Sep 23, 2003
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* 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.