OpenSSL Digital Signature Algorithm Timing Side-Channel Attack Vulnerability [CVE-2018-0734]
CVE Number – CVE-2018-0734
A vulnerability in the Digital Signature Algorithm (DSA) in OpenSSL could allow a local attacker to access sensitive information on a targeted system.
The vulnerability is due to an unspecified condition that exists when the affected software uses the DSA. An attacker could exploit this vulnerability to conduct a timing side-channel attack on an affected system. A successful exploit could allow the attacker to recover the private key, which could be used to conduct further attacks.
OpenSSL has confirmed the vulnerability and released software updates.
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To exploit this vulnerability, the attacker must have user-level access to the targeted system. This access requirement may reduce the likelihood of a successful exploit.
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Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to access local systems.
Administrators are advised to allow only privileged users to access administration or management systems.
Administrators are advised to monitor critical systems.
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OpenSSL has released a security advisory at the following link: Timing vulnerability in DSA signature generation (CVE-2018-0734)
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OpenSSL has released software updates at the following links:
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Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.