From 057265e0183ddf52d56f21adaf0db0f3dc6585a4 Mon Sep 17 00:00:00 2001 From: Tobias Brunner Date: Mon, 29 Jul 2013 23:45:38 +0200 Subject: [PATCH] asn1: Fix handling of invalid ASN.1 length in is_asn1() Fixes CVE-2013-5018. --- src/libstrongswan/asn1/asn1.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/src/libstrongswan/asn1/asn1.c b/src/libstrongswan/asn1/asn1.c index 68f37f4..d860ad9 100644 --- a/src/libstrongswan/asn1/asn1.c +++ b/src/libstrongswan/asn1/asn1.c @@ -642,6 +642,11 @@ bool is_asn1(chunk_t blob) len = asn1_length(&blob); + if (len == ASN1_INVALID_LENGTH) + { + return FALSE; + } + /* exact match */ if (len == blob.len) { -- 1.7.10.4