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Debian DSA-3649-1 Critical: GnuPG RNG Flaw Predictability Risk

Felix Doerre and Vladimir Klebanov from the Karlsruhe Institute of Technology discovered a flaw in the mixing functions of GnuPG's random number generator. An attacker who obtains 4640 bits from the RNG can trivially predict the next 160 bits of output. . - ------------------------------------------------------------------------- Debian Security Advisory DSA-3649-1 This email address is being protected from spambots. You need JavaScript enabled to view it. https://www.debian.org/security/ Salvatore Bonaccorso August 17, 2016 https://www.debian.org/security/faq - ------------------------------------------------------------------------- Package : gnupg CVE ID : CVE-2016-6313 Felix Doerre and Vladimir Klebanov from the Karlsruhe Institute of Technology discovered a flaw in the mixing functions of GnuPG's random number generator. An attacker who obtains 4640 bits from the RNG can trivially predict the next 160 bits of output. A first analysis on the impact of this bug for GnuPG shows that existing RSA keys are not weakened. For DSA and Elgamal keys it is also unlikely that the private key can be predicted from other public information. For the stable distribution (jessie), this problem has been fixed in version 1.4.18-7+deb8u2. We recommend that you upgrade your gnupg packages. Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/ Mailing list: This email address is being protected from spambots. You need JavaScript enabled to view it. . Debian Security Notice DSA-3649-1 highlights a vulnerability in GnuPG's random number generation. It is advised to perform an upgrade.. Debian,GnuPG,RNG Flaw,Security Advisory,Update Recommendation. . Severity: Critical. LinuxSecurity.com Team

Aug 17, 2016 •Critical Debian