[oe] [PATCH] squid: CVE-2016-3947

[Catalin Enache]

Heap-based buffer overflow in the Icmp6::Recv function in
icmp/Icmp6.cc in the pinger in Squid before 3.5.16 and 4.x
before 4.0.8 allows remote servers to cause a denial of
service (performance degradation or transition failures)
or write sensitive information to log files via an ICMPv6
packet.

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-3947

Signed-off-by: Catalin Enache <catalin.enache at windriver.com>
---
 .../squid/files/CVE-2016-3947.patch                | 48 ++++++++++++++++++++++
 .../recipes-daemons/squid/squid_3.5.7.bb           |  1 +
 2 files changed, 49 insertions(+)
 create mode 100644 meta-networking/recipes-daemons/squid/files/CVE-2016-3947.patch

diff --git a/meta-networking/recipes-daemons/squid/files/CVE-2016-3947.patch b/meta-networking/recipes-daemons/squid/files/CVE-2016-3947.patch
new file mode 100644
index 0000000..c83e6ab
--- /dev/null
+++ b/meta-networking/recipes-daemons/squid/files/CVE-2016-3947.patch
@@ -0,0 +1,48 @@
+From 0fe108ecb2bbdf684f159950eaa55d22f07c4008 Mon Sep 17 00:00:00 2001
+From: Catalin Enache <catalin.enache at windriver.com>
+Date: Wed, 20 Apr 2016 15:17:18 +0300
+Subject: [PATCH] pinger: Fix buffer overflow in Icmp6::Recv
+
+Upstream-Status: Backport
+CVE: CVE-2016-3947
+
+Author: Yuriy M. Kaminskiy <yumkam at gmail.com>
+Committer: Amos Jeffries <squid3 at treenet.co.nz
+Signed-off-by: Catalin Enache <catalin.enache at windriver.com>
+---
+ src/icmp/Icmp6.cc | 5 ++---
+ 1 file changed, 2 insertions(+), 3 deletions(-)
+
+diff --git a/src/icmp/Icmp6.cc b/src/icmp/Icmp6.cc
+index 794a51a..ee84b80 100644
+--- a/src/icmp/Icmp6.cc
++++ b/src/icmp/Icmp6.cc
+@@ -256,7 +256,7 @@ Icmp6::Recv(void)
+     #define ip6_hops    // HOPS!!!  (can it be true??)
+ 
+         ip = (struct ip6_hdr *) pkt;
+-        pkt += sizeof(ip6_hdr);
++        NP: echo size needs to +sizeof(ip6_hdr);
+ 
+     debugs(42, DBG_CRITICAL, HERE << "ip6_nxt=" << ip->ip6_nxt <<
+             ", ip6_plen=" << ip->ip6_plen <<
+@@ -267,7 +267,6 @@ Icmp6::Recv(void)
+     */
+ 
+     icmp6header = (struct icmp6_hdr *) pkt;
+-    pkt += sizeof(icmp6_hdr);
+ 
+     if (icmp6header->icmp6_type != ICMP6_ECHO_REPLY) {
+ 
+@@ -292,7 +291,7 @@ Icmp6::Recv(void)
+         return;
+     }
+ 
+-    echo = (icmpEchoData *) pkt;
++    echo = (icmpEchoData *) (pkt + sizeof(icmp6_hdr));
+ 
+     preply.opcode = echo->opcode;
+ 
+-- 
+2.7.4
+
diff --git a/meta-networking/recipes-daemons/squid/squid_3.5.7.bb b/meta-networking/recipes-daemons/squid/squid_3.5.7.bb
index a94fed7..e35aad7 100644
--- a/meta-networking/recipes-daemons/squid/squid_3.5.7.bb
+++ b/meta-networking/recipes-daemons/squid/squid_3.5.7.bb
@@ -19,6 +19,7 @@ SRC_URI = "http://www.squid-cache.org/Versions/v${MAJ_VER}/${MIN_VER}/${BPN}-${P
            file://squid-use-serial-tests-config-needed-by-ptest.patch \
            file://run-ptest \
            file://volatiles.03_squid \
+           file://CVE-2016-3947.patch \
 "
 
 LIC_FILES_CHKSUM = "file://COPYING;md5=c492e2d6d32ec5c1aad0e0609a141ce9 \
-- 
2.7.4