FreeBSD AIO library could allow an attacker to overwrite memory and gain elevated privileges

bsd-aio-overwrite-memory (7693) The risk level is classified as HighHigh Risk


A vulnerability in the AIO library in FreeBSD could allow a local attacker to overwrite arbitrary memory locations. The AIO library implements the POSIX standard for asynchronous I/O and can be enabled in FreeBSD by compiling the kernel with the VFS_AIO option. In certain situations, scheduled AIO operations continue after an execve, which causes memory of the new process to be overwritten. A local attacker could create a malicious program that calls a suid program and use this vulnerability to overwrite arbitrary memory locations and gain elevated privileges on the system.


Gain Privileges


No remedy available as of September 1, 2014.


Platforms Affected:

  • FreeBSD FreeBSD 4.4


Dec 10, 2001

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