Date: Tue, 6 Aug 2019 16:12:43 +0000 (UTC) From: Ed Maste <emaste@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r350638 - stable/11/contrib/bsnmp/lib Message-ID: <201908061612.x76GChOd007362@repo.freebsd.org>
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Author: emaste Date: Tue Aug 6 16:12:43 2019 New Revision: 350638 URL: https://svnweb.freebsd.org/changeset/base/350638 Log: MFC r350635: bsnmp: add asn1 message length validation admbugs: 780 Submitted by: Guido Vranken, bz Reported by: Guido Vranken Approved by: so Security: CVE-2019-5610 Modified: stable/11/contrib/bsnmp/lib/asn1.c Directory Properties: stable/11/ (props changed) Modified: stable/11/contrib/bsnmp/lib/asn1.c ============================================================================== --- stable/11/contrib/bsnmp/lib/asn1.c Tue Aug 6 16:11:16 2019 (r350637) +++ stable/11/contrib/bsnmp/lib/asn1.c Tue Aug 6 16:12:43 2019 (r350638) @@ -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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