frr: CVE-2024-44070 (azl 3) (#10209)

SPECS/frr/CVE-2024-44070.patch

@@ -0,0 +1,48 @@
+From 0998b38e4d61179441f90dd7e7fd6a3a8b7bd8c5 Mon Sep 17 00:00:00 2001
+From: Donatas Abraitis <donatas@opensourcerouting.org>
+Date: Wed, 31 Jul 2024 08:35:14 +0300
+Subject: [PATCH] bgpd: Check the actual remaining stream length before taking
+ TLV value
+
+```
+    0 0xb50b9f898028 in __sanitizer_print_stack_trace (/home/ubuntu/frr-public/frr_public_private-libfuzzer/bgpd/.libs/bgpd+0x368028) (BuildId: 3292703ed7958b20076550c967f879db8dc27ca7)
+    1 0xb50b9f7ed8e4 in fuzzer::PrintStackTrace() (/home/ubuntu/frr-public/frr_public_private-libfuzzer/bgpd/.libs/bgpd+0x2bd8e4) (BuildId: 3292703ed7958b20076550c967f879db8dc27ca7)
+    2 0xb50b9f7d4d9c in fuzzer::Fuzzer::CrashCallback() (/home/ubuntu/frr-public/frr_public_private-libfuzzer/bgpd/.libs/bgpd+0x2a4d9c) (BuildId: 3292703ed7958b20076550c967f879db8dc27ca7)
+    3 0xe0d12d7469cc  (linux-vdso.so.1+0x9cc) (BuildId: 1a77697e9d723fe22246cfd7641b140c427b7e11)
+    4 0xe0d12c88f1fc in __pthread_kill_implementation nptl/pthread_kill.c:43:17
+    5 0xe0d12c84a678 in gsignal signal/../sysdeps/posix/raise.c:26:13
+    6 0xe0d12c83712c in abort stdlib/abort.c:79:7
+    7 0xe0d12d214724 in _zlog_assert_failed /home/ubuntu/frr-public/frr_public_private-libfuzzer/lib/zlog.c:789:2
+    8 0xe0d12d1285e4 in stream_get /home/ubuntu/frr-public/frr_public_private-libfuzzer/lib/stream.c:324:3
+    9 0xb50b9f8e47c4 in bgp_attr_encap /home/ubuntu/frr-public/frr_public_private-libfuzzer/bgpd/bgp_attr.c:2758:3
+    10 0xb50b9f8dcd38 in bgp_attr_parse /home/ubuntu/frr-public/frr_public_private-libfuzzer/bgpd/bgp_attr.c:3783:10
+    11 0xb50b9faf74b4 in bgp_update_receive /home/ubuntu/frr-public/frr_public_private-libfuzzer/bgpd/bgp_packet.c:2383:20
+    12 0xb50b9faf1dcc in bgp_process_packet /home/ubuntu/frr-public/frr_public_private-libfuzzer/bgpd/bgp_packet.c:4075:11
+    13 0xb50b9f8c90d0 in LLVMFuzzerTestOneInput /home/ubuntu/frr-public/frr_public_private-libfuzzer/bgpd/bgp_main.c:582:3
+```
+
+Reported-by: Iggy Frankovic <iggyfran@amazon.com>
+Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
+---
+ bgpd/bgp_attr.c | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+diff --git a/bgpd/bgp_attr.c b/bgpd/bgp_attr.c
+index 2ed49935e52b..ac5d08b6fe6e 100644
+--- a/bgpd/bgp_attr.c
++++ b/bgpd/bgp_attr.c
+@@ -2749,6 +2749,14 @@ static int bgp_attr_encap(struct bgp_attr_parser_args *args)
+ 						  args->total);
+ 		}
+ 
++		if (STREAM_READABLE(BGP_INPUT(peer)) < sublength) {
++			zlog_err("Tunnel Encap attribute sub-tlv length %d exceeds remaining stream length %zu",
++				 sublength, STREAM_READABLE(BGP_INPUT(peer)));
++			return bgp_attr_malformed(args,
++						  BGP_NOTIFY_UPDATE_OPT_ATTR_ERR,
++						  args->total);
++		}
++
+ 		/* alloc and copy sub-tlv */
+ 		/* TBD make sure these are freed when attributes are released */
+ 		tlv = XCALLOC(MTYPE_ENCAP_TLV,

SPECS/frr/frr.spec

@@ -3,7 +3,7 @@
 Summary:        Routing daemon
 Name:           frr
 Version:        9.1.1
-Release:        1%{?dist}
+Release:        2%{?dist}
 License:        GPL-2.0-or-later
 Vendor:         Microsoft Corporation
 Distribution:   Azure Linux
@@ -16,6 +16,7 @@ Patch1:         0001-enable-openssl.patch
 Patch2:         0002-disable-eigrp-crypto.patch
 Patch3:         0003-fips-mode.patch
 Patch4:         0004-remove-grpc-test.patch
+Patch5:         CVE-2024-44070.patch
 
 BuildRequires:  autoconf
 BuildRequires:  automake
@@ -198,6 +199,9 @@ rm tests/lib/*grpc*
 %{_sysusersdir}/%{name}.conf
 
 %changelog
+* Wed Aug 21 2024 Brian Fjeldstad <bfjelds@microsoft.com> - 9.1.1-2
+- Fix CVE-2024-44070
+
 * Tue Aug 06 2024 Sumedh Sharma <sumsharma@microsoft.com> - 9.1.1-1
 - Bump version to 9.1.1 to fix CVE-2024-31950 & CVE-2024-31951