** Changed in: qemu
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1812451
Title:
In windows host, tftp arbitrary file read vulnerability
Status in QEMU:
Fix Released
Bug description:
https://github.com/qemu/qemu/blob/master/slirp/tftp.c#L343
if (!strncmp(req_fname, "../", 3) ||
req_fname[strlen(req_fname) - 1] == '/' ||
strstr(req_fname, "/../")) {
tftp_send_error(spt, 2, "Access violation", tp);
return;
}
There is file path check for not allowing escape tftp directory.
But, in windows, file path is separated by "\" backslash.
So, guest can read arbitrary file in Windows host.
This bug is variant of CVE-2019-2553 - Directory traversal
vulnerability.
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