Date: Tue, 6 Aug 2019 16:09:07 +0000 (UTC) From: Ed Maste <emaste@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r350635 - head/contrib/bsnmp/lib Message-ID: <201908061609.x76G97xX001537@repo.freebsd.org>
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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); }
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