In the Linux kernel, the following vulnerability has been resolved: sctp:
break out if skb_header_pointer returns NULL in sctp_rcv_ootb We should
always check if skb_header_pointer’s return is NULL before using it,
otherwise it may cause null-ptr-deref, as syzbot reported: KASAN:
null-ptr-deref in range [0x0000000000000000-0x0000000000000007] RIP:
0010:sctp_rcv_ootb net/sctp/input.c:705 [inline] RIP:
0010:sctp_rcv+0x1d84/0x3220 net/sctp/input.c:196 Call Trace: <IRQ>
sctp6_rcv+0x38/0x60 net/sctp/ipv6.c:1109
ip6_protocol_deliver_rcu+0x2e9/0x1ca0 net/ipv6/ip6_input.c:422
ip6_input_finish+0x62/0x170 net/ipv6/ip6_input.c:463 NF_HOOK
include/linux/netfilter.h:307 [inline] NF_HOOK
include/linux/netfilter.h:301 [inline] ip6_input+0x9c/0xd0
net/ipv6/ip6_input.c:472 dst_input include/net/dst.h:460 [inline]
ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline] NF_HOOK
include/linux/netfilter.h:307 [inline] NF_HOOK
include/linux/netfilter.h:301 [inline] ipv6_rcv+0x28c/0x3c0
net/ipv6/ip6_input.c:297
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 18.04 | noarch | linux-aws | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux-aws | < any | UNKNOWN |
ubuntu | 18.04 | noarch | linux-aws-5.4 | < any | UNKNOWN |
ubuntu | 16.04 | noarch | linux-aws-hwe | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux-azure | < any | UNKNOWN |
ubuntu | 14.04 | noarch | linux-azure | < any | UNKNOWN |
ubuntu | 16.04 | noarch | linux-azure | < any | UNKNOWN |
ubuntu | 18.04 | noarch | linux-azure-4.15 | < any | UNKNOWN |
git.kernel.org/linus/f7e745f8e94492a8ac0b0a26e25f2b19d342918f (5.15-rc4)
git.kernel.org/stable/c/77bc7dcf0fcc1519341a91788d7a2914fcfddf6d
git.kernel.org/stable/c/8180611c238e11676612eb2a9828b1c7a3a4d77b
git.kernel.org/stable/c/8c630a7b4f9dec63f08bd881ab77984a724a5124
git.kernel.org/stable/c/9c6591ae8e63f93c895ad5e2703c36c548aac997
git.kernel.org/stable/c/ec018021cf445abbe8e2f3e2a7f1dcc813cb8ea1
git.kernel.org/stable/c/f7e745f8e94492a8ac0b0a26e25f2b19d342918f
launchpad.net/bugs/cve/CVE-2021-47397
nvd.nist.gov/vuln/detail/CVE-2021-47397
security-tracker.debian.org/tracker/CVE-2021-47397
www.cve.org/CVERecord?id=CVE-2021-47397