OpenSSL random number generator weak security

openssl-rng-weak-security (42375) The risk level is classified as LowLow 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: 7.8
  Access Vector: Network
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: Complete
  Integrity Impact: None
  Availability Impact: None
 
Temporal Score: 6.4
  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.
  • IBM Security Bulletin S1004216: IBM XIV Storage System (MTM 2810-A14, 2812-A14) - weak key used in XIV OpenSSL certificate.
  • 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
  • OSVDB ID: 45029: OpenSSL on Debian/Ubuntu Linux Predictable Random Number Generator (RNG) Cryptographic Key Generation Weakness
  • OSVDB ID: 45503: Ubuntu Linux ssh-vulnkey authorized_keys Unspecified Options Key Guessing Weakness
  • 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
  • IBM XIV Storage System
  • 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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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.

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