• News
• Infocus
• Foundations
• Microsoft
• Unix
• IDS
• Incidents
• Virus
• Pen-Test
• Firewalls
• Columnists
• Mailing Lists
• Newsletters
• Bugtraq
• Focus on IDS
• Focus on Linux
• Focus on Microsoft
• Forensics
• Pen-test
• Security Basics
• Vuln Dev
• Vulnerabilities
• Jobs
• Job Opportunities
• Resumes
• Job Seekers
• Employers
• Tools
• RSS
• News
• Vulns
• Security Research

• info
• discussion
• exploit
• solution
• references

FreeBSD AIO Library Cross Process Memory Write Vulnerability

aio.h is a library implementing the POSIX standard for asynchronous I/O. Support for AIO may be enabled in FreeBSD by compiling the kernel with the VFS_AIO option. This option is not enabled in the default kernel configuration.

Under some circumstances, pending reads from an input socket may persist through a call to execve. Eventually the read will continue, and write to the memory space of the new process.

If a local user is able to create and execute a malicious program calling a suid program, it may be possible to overwrite arbitrary memory locations in the suid process with arbitrary data. This could immediately lead to escalated privileges.