GNU cpio through 2.13 allows attackers to execute arbitrary code via a crafted pattern file, because of a dstring.c ds_fgetstr integer overflow that triggers an out-of-bounds heap write. NOTE: it is unclear whether there are common cases where the pattern file, associated with the -E option, is untrusted data.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| https://github.com/fangqyi/cpiopwn | third party advisory exploit |
| https://lists.gnu.org/archive/html/bug-cpio/2021-08/msg00000.html | vendor advisory mailing list exploit |
| https://lists.gnu.org/archive/html/bug-cpio/2021-08/msg00002.html | vendor advisory mailing list exploit |
| https://git.savannah.gnu.org/cgit/cpio.git/commit/?id=dd96882877721703e19272fe25034560b794061b | third party advisory patch |
| https://lists.debian.org/debian-lts-announce/2023/06/msg00007.html | mailing list |