🔒 Sentinel: [HIGH] Fix buffer overflow in patch-cmdline#88
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Replace `strcpy` with `strncpy` to prevent buffer overflows when copying the command line into the mapped buffer. Also fixed the `munmap` cleanup logic which was using an incorrect size. Co-authored-by: manupawickramasinghe <73810867+manupawickramasinghe@users.noreply.github.com>
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Replace `strcpy` with `strncpy` to prevent buffer overflows when copying the command line into the mapped buffer. Also fixed the `munmap` cleanup logic which was using an incorrect size. Signed-off-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com> Co-authored-by: manupawickramasinghe <73810867+manupawickramasinghe@users.noreply.github.com>
Replace `strcpy` with `strncpy` to prevent buffer overflows when copying the command line into the mapped buffer. Also fixed the `munmap` cleanup logic which was using an incorrect size. Signed-off-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com> Co-authored-by: manupawickramasinghe <73810867+manupawickramasinghe@users.noreply.github.com>
…918498490356243 Signed-off-by: M.N Wickramasinghe <95234271+ManupaKDU@users.noreply.github.com>
ManupaKDU
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🎯 What: Buffer overflow vulnerability in
⚠️ Risk: An attacker or misconfigured script could provide a command line that causes a buffer overflow, potentially corrupting memory or leading to arbitrary code execution within the context of the tool. Additionally, the
patch-cmdline.cand a memory unmapping bug.munmapcall in the error path was using the string length (len) instead of the mapped size (search_space + CMDLINE_MAX), leading to memory leaks or undefined behavior.🛡️ Solution: Replaced
strcpywithstrncpy, usingCMDLINE_MAX - 9as the limit to prevent the buffer from being overrun, ensuring the buffer remains safely within bounds and correctly null-terminated (thanks to a precedingmemset). Corrected themunmapsize to match the originalmmapsize.PR created automatically by Jules for task 10592918498490356243 started by @manupawickramasinghe