OpenSSL random number generator weak security
| openssl-rng-weak-security (42375) |  Low Risk |
Description:
OpenSSL, when running on certain Linux distributions, could provide weaker than expected security. The random number generator creates predictable values. A remote attacker could exploit this vulnerability using brute-force methods to obtain cryptographic key values.
*CVSS:
| Base Score: | 4.3 |
| Access Vector: | Network |
| Access Complexity: | Medium |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | Partial |
| Availability Impact: | None |
| Temporal Score: | 3.6 |
| Exploitability: | Functional |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Other
Remedy:
Apply the appropriate update for your system. See References.
References:
- AST-2008-007: Asterisk installations using cryptographic keys generated by Debian-based systems may be using a vulnerable implementation of OpenSSL.
- BugTraq Mailing List, Thu May 15 2008 - 00:54:29 CDT: Debian generated SSH-Keys working exploit.
- OpenSSL Web site: OpenSSL: The Open Source toolkit for SSL/TLS.
- BID-29179: Debian OpenSSL Package Random Number Generator Weakness
- CVE-2008-0166: OpenSSL 0.9.8c-1 up to versions before 0.9.8g-9 on Debian-based operating systems uses a random number generator that generates predictable numbers, which makes it easier for remote attackers to conduct brute force guessing attacks against cryptographic keys.
- DSA-1571: openssl -- predictable random number generator
- DSA-1576: openssh -- predictable random number generator
- SA30220: Debian OpenSSL Predictable Random Number Generator and Update
- SECTRACK ID: 1020017: OpenSSL for Debian/Ubuntu Predictable RNG Lets Remote Users Determine Cryptographic Keys
- US-CERT VU#925211: Debian and Ubuntu OpenSSL packages contain a predictable random number generator
- USN-612-1: OpenSSL vulnerability
- USN-612-2: OpenSSH vulnerability
- USN-612-3: OpenVPN vulnerability
- USN-612-4: ssl-cert vulnerability
- USN-612-7: OpenSSH update
Platforms Affected:
- Canonical Ubuntu 6.06 LTS
- Canonical Ubuntu 7.04
- Canonical Ubuntu 7.10
- Canonical Ubuntu 8.04 LTS
- Debian Debian Linux 4.0
- OpenSSL OpenSSL 0.9.8c
- OpenSSL OpenSSL 0.9.8d
- OpenSSL OpenSSL 0.9.8e
- OpenSSL OpenSSL 0.9.8f
- OpenSSL OpenSSL 0.9.8g
Reported:
May 13, 2008
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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.