svn commit: r343043 - head/crypto/openssh
Rodney W. Grimes
freebsd at pdx.rh.CN85.dnsmgr.net
Tue Jan 15 17:00:16 UTC 2019
> Author: emaste
> Date: Tue Jan 15 15:35:14 2019
> New Revision: 343043
> URL: https://svnweb.freebsd.org/changeset/base/343043
>
> Log:
> scp: disallow empty or current directory
>
> Obtained from: OpenBSD scp.c 1.198
> Security: CVE-2018-20685
> Sponsored by: The FreeBSD Foundation
Can this be MFCed to 12, 11 and 10?
>
> Modified:
> head/crypto/openssh/scp.c
>
> Modified: head/crypto/openssh/scp.c
> ==============================================================================
> --- head/crypto/openssh/scp.c Tue Jan 15 09:48:18 2019 (r343042)
> +++ head/crypto/openssh/scp.c Tue Jan 15 15:35:14 2019 (r343043)
> @@ -1106,7 +1106,8 @@ sink(int argc, char **argv)
> SCREWUP("size out of range");
> size = (off_t)ull;
>
> - if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
> + if (*cp == '\0' || strchr(cp, '/') != NULL ||
> + strcmp(cp, ".") == 0 || strcmp(cp, "..") == 0) {
> run_err("error: unexpected filename: %s", cp);
> exit(1);
> }
>
>
--
Rod Grimes rgrimes at freebsd.org
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