Author: emaste
Date: Tue Aug 6 16:09:06 2019
New Revision: 350635
URL: https://svnweb.freebsd.org/changeset/base/350635
Log:
bsnmp: add asn1 message length validation
admbugs: 780
Submitted by: Guido Vranken, bz
Reported by: Guido Vranken
Security: CVE-2019-5610
Modified:
head/contrib/bsnmp/lib/asn1.c
Modified: head/contrib/bsnmp/lib/asn1.c
==============================================================================
--- head/contrib/bsnmp/lib/asn1.c Tue Aug 6 14:39:02 2019
(r350634)
+++ head/contrib/bsnmp/lib/asn1.c Tue Aug 6 16:09:06 2019
(r350635)
@@ -100,6 +100,11 @@ asn_get_header(struct asn_buf *b, u_char *type, asn_le
*len = *b->asn_cptr++;
b->asn_len--;
}
+ if (*len > b->asn_len) {
+ asn_error(b, "len %u exceeding asn_len %u", *len, b->asn_len);
+ return (ASN_ERR_EOBUF);
+ }
+
return (ASN_ERR_OK);
}
_______________________________________________
svn-src-all@freebsd.org mailing list
https://lists.freebsd.org/mailman/listinfo/svn-src-all
To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
