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USN-905-1: sudo vulnerabilities

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linux-howto

http://www.ubuntu.com – It was discovered that sudo did not reset group permissions when the 'runas_default' configuration option was used. A local attacker could exploit this to escalate group privileges if sudo was configured to allow the attacker to run commands under the runas_default account. The runas_default configuration option is not used in the default installation of Ubuntu. This issue affected Ubuntu 8.04 LTS, 8.10 and 9.04. (CVE-2010-0427) (Distributions)