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gpg: Sanitize diagnostic with the original file name. 

* g10/mainproc.c (proc_plaintext): Sanitize verbose output.
--

This fixes a forgotten sanitation of user supplied data in a verbose
mode diagnostic.  The mention CVE is about using this to inject
status-fd lines into the stderr output.  Other harm good as well be
done.  Note that GPGME based applications are not affected because
GPGME does not fold status output into stderr.

CVE-id: CVE-2018-12020
GnuPG-bug-id: 4012
(cherry picked from commit 13f135c7a2)
This commit is contained in:
Werner Koch 2018-06-08 10:45:21 +02:00
parent 0f8fd95ab3
commit 2326851c60
No known key found for this signature in database
GPG Key ID: E3FDFF218E45B72B
1 changed files with 5 additions and 1 deletions
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6
g10/mainproc.c
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@ -638,7 +638,11 @@ proc_plaintext( CTX c, PACKET *pkt )
if( pt->namelen == 8 && !memcmp( pt->name, "_CONSOLE", 8 ) )
log_info(_("NOTE: sender requested \"for-your-eyes-only\"\n"));
else if( opt.verbose )
log_info(_("original file name='%.*s'\n"), pt->namelen, pt->name);
{
char *tmp = make_printable_string (pt->name, pt->namelen, 0);
log_info (_("original file name='%.*s'\n"), (int)strlen (tmp), tmp);
xfree (tmp);
}
free_md_filter_context( &c->mfx );
c->mfx.md = md_open( 0, 0);
/* fixme: we may need to push the textfilter if we have sigclass 1