sudo 1.6.0 through 1.6.3p7 does not properly clear the environment before calling the mail program, which could allow local users to gain root privileges by modifying environment variables and changing how the mail program is invoked.
Local Access Required
Loss of Integrity
Upgrade to version 1.6.4 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.
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