A Gentoo advisory reports:
Net-SNMP creates temporary files in an insecure manner, possibly allowing the execution of arbitrary code.
A malicious local attacker could exploit a race condition to change the content of the temporary files before they are executed by fixproc, possibly leading to the execution of arbitrary code. A local attacker could also create symbolic links in the temporary files directory, pointing to a valid file somewhere on the filesystem. When fixproc is executed, this would result in the file being overwritten.
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