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author | Sona Sarmadi <sona.sarmadi@enea.com> | 2016-03-09 07:37:31 +0100 |
---|---|---|
committer | Huimin She <huimin.she@enea.com> | 2016-03-10 15:01:43 +0100 |
commit | 0f8f654b183e41fed39e2eaa91b7dcb3a9e2086e (patch) | |
tree | 85db41980adcbc878551b82825cc87613d22e917 | |
parent | 7e15834edfd7f1a4bed0555440b7db97c2b1198e (diff) | |
download | meta-enea-0f8f654b183e41fed39e2eaa91b7dcb3a9e2086e.tar.gz |
kernel-ipv6: CVE-2015-2922
Fixes denial of service (DoS) attack against IPv6 network
stacks due to improper handling of Router Advertisements.
Reference:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2922
Upstream fix:
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/
patch/?id=ac12ff18b11259e10c2d543aa58c73ff88a68e77
Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
Signed-off-by: Huimin She <huimin.she@enea.com>
-rw-r--r-- | recipes-kernel/linux/linux-qoriq-3.12/CVE-2015-2922.patch | 55 | ||||
-rw-r--r-- | recipes-kernel/linux/linux-qoriq-common.inc | 1 |
2 files changed, 56 insertions, 0 deletions
diff --git a/recipes-kernel/linux/linux-qoriq-3.12/CVE-2015-2922.patch b/recipes-kernel/linux/linux-qoriq-3.12/CVE-2015-2922.patch new file mode 100644 index 0000000..38eb360 --- /dev/null +++ b/recipes-kernel/linux/linux-qoriq-3.12/CVE-2015-2922.patch | |||
@@ -0,0 +1,55 @@ | |||
1 | From ac12ff18b11259e10c2d543aa58c73ff88a68e77 Mon Sep 17 00:00:00 2001 | ||
2 | From: "D.S. Ljungmark" <ljungmark@modio.se> | ||
3 | Date: Wed, 25 Mar 2015 09:28:15 +0100 | ||
4 | Subject: ipv6: Don't reduce hop limit for an interface | ||
5 | |||
6 | [ Upstream commit 6fd99094de2b83d1d4c8457f2c83483b2828e75a ] | ||
7 | |||
8 | A local route may have a lower hop_limit set than global routes do. | ||
9 | |||
10 | RFC 3756, Section 4.2.7, "Parameter Spoofing" | ||
11 | |||
12 | > 1. The attacker includes a Current Hop Limit of one or another small | ||
13 | > number which the attacker knows will cause legitimate packets to | ||
14 | > be dropped before they reach their destination. | ||
15 | |||
16 | > As an example, one possible approach to mitigate this threat is to | ||
17 | > ignore very small hop limits. The nodes could implement a | ||
18 | > configurable minimum hop limit, and ignore attempts to set it below | ||
19 | > said limit. | ||
20 | |||
21 | Fixes CVE-2015-2922. | ||
22 | Upstream-Status: Backport | ||
23 | |||
24 | Signed-off-by: D.S. Ljungmark <ljungmark@modio.se> | ||
25 | Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> | ||
26 | Signed-off-by: David S. Miller <davem@davemloft.net> | ||
27 | Signed-off-by: Jiri Slaby <jslaby@suse.cz> | ||
28 | Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com> | ||
29 | --- | ||
30 | net/ipv6/ndisc.c | 9 ++++++++- | ||
31 | 1 file changed, 8 insertions(+), 1 deletion(-) | ||
32 | |||
33 | diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c | ||
34 | index f8a55ff..fda5d95 100644 | ||
35 | --- a/net/ipv6/ndisc.c | ||
36 | +++ b/net/ipv6/ndisc.c | ||
37 | @@ -1191,7 +1191,14 @@ static void ndisc_router_discovery(struct sk_buff *skb) | ||
38 | if (rt) | ||
39 | rt6_set_expires(rt, jiffies + (HZ * lifetime)); | ||
40 | if (ra_msg->icmph.icmp6_hop_limit) { | ||
41 | - in6_dev->cnf.hop_limit = ra_msg->icmph.icmp6_hop_limit; | ||
42 | + /* Only set hop_limit on the interface if it is higher than | ||
43 | + * the current hop_limit. | ||
44 | + */ | ||
45 | + if (in6_dev->cnf.hop_limit < ra_msg->icmph.icmp6_hop_limit) { | ||
46 | + in6_dev->cnf.hop_limit = ra_msg->icmph.icmp6_hop_limit; | ||
47 | + } else { | ||
48 | + ND_PRINTK(2, warn, "RA: Got route advertisement with lower hop_limit than current\n"); | ||
49 | + } | ||
50 | if (rt) | ||
51 | dst_metric_set(&rt->dst, RTAX_HOPLIMIT, | ||
52 | ra_msg->icmph.icmp6_hop_limit); | ||
53 | -- | ||
54 | cgit v0.12 | ||
55 | |||
diff --git a/recipes-kernel/linux/linux-qoriq-common.inc b/recipes-kernel/linux/linux-qoriq-common.inc index 9052358..504bbfc 100644 --- a/recipes-kernel/linux/linux-qoriq-common.inc +++ b/recipes-kernel/linux/linux-qoriq-common.inc | |||
@@ -23,6 +23,7 @@ SRC_URI += "file://b4860-hard_irq_disable-bug.patch \ | |||
23 | file://net-rds-CVE-2015-2042.patch \ | 23 | file://net-rds-CVE-2015-2042.patch \ |
24 | file://drivers-scsi-CVE-2015-5707.patch \ | 24 | file://drivers-scsi-CVE-2015-5707.patch \ |
25 | file://vhost-CVE-2015-6252.patch \ | 25 | file://vhost-CVE-2015-6252.patch \ |
26 | file://CVE-2015-2922.patch \ | ||
26 | " | 27 | " |
27 | 28 | ||
28 | SRC_URI += "file://cfg/00013-localversion.cfg \ | 29 | SRC_URI += "file://cfg/00013-localversion.cfg \ |