一、漏洞信息
漏洞编号：CVE-2024-26633
漏洞归属组件：kernel
漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0
CVSS V2.0分值：
BaseScore：0.0 Low
Vector：CVSS：2.0/
漏洞简述：
In the Linux kernel, the following vulnerability has been resolved:ip6_tunnel: fix NEXTHDR_FRAGMENT handling in ip6_tnl_parse_tlv_enc_lim()syzbot pointed out [1] that NEXTHDR_FRAGMENT handling is broken.Reading frag_off can only be done if we pulled enough bytesto skb->head. Currently we might access garbage.[1]BUG: KMSAN: uninit-value in ip6_tnl_parse_tlv_enc_lim+0x94f/0xbb0ip6_tnl_parse_tlv_enc_lim+0x94f/0xbb0ipxip6_tnl_xmit net/ipv6/ip6_tunnel.c:1326 [inline]ip6_tnl_start_xmit+0xab2/0x1a70 net/ipv6/ip6_tunnel.c:1432__netdev_start_xmit include/linux/netdevice.h:4940 [inline]netdev_start_xmit include/linux/netdevice.h:4954 [inline]xmit_one net/core/dev.c:3548 [inline]dev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3564__dev_queue_xmit+0x33b8/0x5130 net/core/dev.c:4349dev_queue_xmit include/linux/netdevice.h:3134 [inline]neigh_connected_output+0x569/0x660 net/core/neighbour.c:1592neigh_output include/net/neighbour.h:542 [inline]ip6_finish_output2+0x23a9/0x2b30 net/ipv6/ip6_output.c:137ip6_finish_output+0x855/0x12b0 net/ipv6/ip6_output.c:222NF_HOOK_COND include/linux/netfilter.h:303 [inline]ip6_output+0x323/0x610 net/ipv6/ip6_output.c:243dst_output include/net/dst.h:451 [inline]ip6_local_out+0xe9/0x140 net/ipv6/output_core.c:155ip6_send_skb net/ipv6/ip6_output.c:1952 [inline]ip6_push_pending_frames+0x1f9/0x560 net/ipv6/ip6_output.c:1972rawv6_push_pending_frames+0xbe8/0xdf0 net/ipv6/raw.c:582rawv6_sendmsg+0x2b66/0x2e70 net/ipv6/raw.c:920inet_sendmsg+0x105/0x190 net/ipv4/af_inet.c:847sock_sendmsg_nosec net/socket.c:730 [inline]__sock_sendmsg net/socket.c:745 [inline]____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638__sys_sendmsg net/socket.c:2667 [inline]__do_sys_sendmsg net/socket.c:2676 [inline]__se_sys_sendmsg net/socket.c:2674 [inline]__x64_sys_sendmsg+0x307/0x490 net/socket.c:2674do_syscall_x64 arch/x86/entry/common.c:52 [inline]do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83entry_SYSCALL_64_after_hwframe+0x63/0x6bUninit was created at:slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768slab_alloc_node mm/slub.c:3478 [inline]__kmem_cache_alloc_node+0x5c9/0x970 mm/slub.c:3517__do_kmalloc_node mm/slab_common.c:1006 [inline]__kmalloc_node_track_caller+0x118/0x3c0 mm/slab_common.c:1027kmalloc_reserve+0x249/0x4a0 net/core/skbuff.c:582pskb_expand_head+0x226/0x1a00 net/core/skbuff.c:2098__pskb_pull_tail+0x13b/0x2310 net/core/skbuff.c:2655pskb_may_pull_reason include/linux/skbuff.h:2673 [inline]pskb_may_pull include/linux/skbuff.h:2681 [inline]ip6_tnl_parse_tlv_enc_lim+0x901/0xbb0 net/ipv6/ip6_tunnel.c:408ipxip6_tnl_xmit net/ipv6/ip6_tunnel.c:1326 [inline]ip6_tnl_start_xmit+0xab2/0x1a70 net/ipv6/ip6_tunnel.c:1432__netdev_start_xmit include/linux/netdevice.h:4940 [inline]netdev_start_xmit include/linux/netdevice.h:4954 [inline]xmit_one net/core/dev.c:3548 [inline]dev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3564__dev_queue_xmit+0x33b8/0x5130 net/core/dev.c:4349dev_queue_xmit include/linux/netdevice.h:3134 [inline]neigh_connected_output+0x569/0x660 net/core/neighbour.c:1592neigh_output include/net/neighbour.h:542 [inline]ip6_finish_output2+0x23a9/0x2b30 net/ipv6/ip6_output.c:137ip6_finish_output+0x855/0x12b0 net/ipv6/ip6_output.c:222NF_HOOK_COND include/linux/netfilter.h:303 [inline]ip6_output+0x323/0x610 net/ipv6/ip6_output.c:243dst_output include/net/dst.h:451 [inline]ip6_local_out+0xe9/0x140 net/ipv6/output_core.c:155ip6_send_skb net/ipv6/ip6_output.c:1952 [inline]ip6_push_pending_frames+0x1f9/0x560 net/ipv6/ip6_output.c:1972rawv6_push_pending_frames+0xbe8/0xdf0 net/ipv6/raw.c:582rawv6_sendmsg+0x2b66/0x2e70 net/ipv6/raw.c:920inet_sendmsg+0x105/0x190 net/ipv4/af_inet.c:847sock_sendmsg_nosec net/socket.c:730 [inline]__sock_sendmsg net/socket.c:745 [inline]____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638__sys_sendmsg net/socket.c:2667 [inline]__do_sys_sendms---truncated---
漏洞公开时间：2024-03-18 19:15:09
漏洞创建时间：2024-03-18 20:26:56
漏洞详情参考链接：
https://nvd.nist.gov/vuln/detail/CVE-2024-26633

漏洞分析指导链接：
https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
漏洞数据来源:
openBrain开源漏洞感知系统
漏洞补丁信息：

二、漏洞分析结构反馈
影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:ip6_tunnel: fix NEXTHDR_FRAGMENT handling in ip6_tnl_parse_tlv_enc_lim()syzbot pointed out [1] that NEXTHDR_FRAGMENT handling is broken.Reading frag_off can only be done if we pulled enough bytesto skb->head. Currently we might access garbage.[1]BUG: KMSAN: uninit-value in ip6_tnl_parse_tlv_enc_lim+0x94f/0xbb0ip6_tnl_parse_tlv_enc_lim+0x94f/0xbb0ipxip6_tnl_xmit net/ipv6/ip6_tunnel.c:1326 [inline]ip6_tnl_start_xmit+0xab2/0x1a70 net/ipv6/ip6_tunnel.c:1432__netdev_start_xmit include/linux/netdevice.h:4940 [inline]netdev_start_xmit include/linux/netdevice.h:4954 [inline]xmit_one net/core/dev.c:3548 [inline]dev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3564__dev_queue_xmit+0x33b8/0x5130 net/core/dev.c:4349dev_queue_xmit include/linux/netdevice.h:3134 [inline]neigh_connected_output+0x569/0x660 net/core/neighbour.c:1592neigh_output include/net/neighbour.h:542 [inline]ip6_finish_output2+0x23a9/0x2b30 net/ipv6/ip6_output.c:137ip6_finish_output+0x855/0x12b0 net/ipv6/ip6_output.c:222NF_HOOK_COND include/linux/netfilter.h:303 [inline]ip6_output+0x323/0x610 net/ipv6/ip6_output.c:243dst_output include/net/dst.h:451 [inline]ip6_local_out+0xe9/0x140 net/ipv6/output_core.c:155ip6_send_skb net/ipv6/ip6_output.c:1952 [inline]ip6_push_pending_frames+0x1f9/0x560 net/ipv6/ip6_output.c:1972rawv6_push_pending_frames+0xbe8/0xdf0 net/ipv6/raw.c:582rawv6_sendmsg+0x2b66/0x2e70 net/ipv6/raw.c:920inet_sendmsg+0x105/0x190 net/ipv4/af_inet.c:847sock_sendmsg_nosec net/socket.c:730 [inline]__sock_sendmsg net/socket.c:745 [inline]____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638__sys_sendmsg net/socket.c:2667 [inline]__do_sys_sendmsg net/socket.c:2676 [inline]__se_sys_sendmsg net/socket.c:2674 [inline]__x64_sys_sendmsg+0x307/0x490 net/socket.c:2674do_syscall_x64 arch/x86/entry/common.c:52 [inline]do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83entry_SYSCALL_64_after_hwframe+0x63/0x6bUninit was created at:slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768slab_alloc_node mm/slub.c:3478 [inline]__kmem_cache_alloc_node+0x5c9/0x970 mm/slub.c:3517__do_kmalloc_node mm/slab_common.c:1006 [inline]__kmalloc_node_track_caller+0x118/0x3c0 mm/slab_common.c:1027kmalloc_reserve+0x249/0x4a0 net/core/skbuff.c:582pskb_expand_head+0x226/0x1a00 net/core/skbuff.c:2098__pskb_pull_tail+0x13b/0x2310 net/core/skbuff.c:2655pskb_may_pull_reason include/linux/skbuff.h:2673 [inline]pskb_may_pull include/linux/skbuff.h:2681 [inline]ip6_tnl_parse_tlv_enc_lim+0x901/0xbb0 net/ipv6/ip6_tunnel.c:408ipxip6_tnl_xmit net/ipv6/ip6_tunnel.c:1326 [inline]ip6_tnl_start_xmit+0xab2/0x1a70 net/ipv6/ip6_tunnel.c:1432__netdev_start_xmit include/linux/netdevice.h:4940 [inline]netdev_start_xmit include/linux/netdevice.h:4954 [inline]xmit_one net/core/dev.c:3548 [inline]dev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3564__dev_queue_xmit+0x33b8/0x5130 net/core/dev.c:4349dev_queue_xmit include/linux/netdevice.h:3134 [inline]neigh_connected_output+0x569/0x660 net/core/neighbour.c:1592neigh_output include/net/neighbour.h:542 [inline]ip6_finish_output2+0x23a9/0x2b30 net/ipv6/ip6_output.c:137ip6_finish_output+0x855/0x12b0 net/ipv6/ip6_output.c:222NF_HOOK_COND include/linux/netfilter.h:303 [inline]ip6_output+0x323/0x610 net/ipv6/ip6_output.c:243dst_output include/net/dst.h:451 [inline]ip6_local_out+0xe9/0x140 net/ipv6/output_core.c:155ip6_send_skb net/ipv6/ip6_output.c:1952 [inline]ip6_push_pending_frames+0x1f9/0x560 net/ipv6/ip6_output.c:1972rawv6_push_pending_frames+0xbe8/0xdf0 net/ipv6/raw.c:582rawv6_sendmsg+0x2b66/0x2e70 net/ipv6/raw.c:920inet_sendmsg+0x105/0x190 net/ipv4/af_inet.c:847sock_sendmsg_nosec net/socket.c:730 [inline]__sock_sendmsg net/socket.c:745 [inline]____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638__sys_sendmsg net/socket.c:2667 [inline]__do_sys_sendms---truncated---
openEuler评分：
5.5
Vector：CVSS：2.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
受影响版本排查(受影响/不受影响)：
1.openEuler-20.03-LTS-SP1(4.19.90):受影响
2.openEuler-20.03-LTS-SP4(4.19.90):受影响
3.openEuler-22.03-LTS(5.10.0):受影响
4.openEuler-22.03-LTS-SP1(5.10.0):受影响
5.openEuler-22.03-LTS-SP2(5.10.0):受影响
6.openEuler-22.03-LTS-SP3(5.10.0):受影响
7.master(6.1.0):不受影响
8.openEuler-22.03-LTS-Next(5.10.0):不受影响
9.openEuler-24.03-LTS:不受影响
10.openEuler-24.03-LTS-Next:不受影响

修复是否涉及abi变化(是/否)：
1.openEuler-20.03-LTS-SP1(4.19.90):否
2.openEuler-20.03-LTS-SP4(4.19.90):否
3.openEuler-22.03-LTS(5.10.0):否
4.openEuler-22.03-LTS-SP1(5.10.0):否
5.openEuler-22.03-LTS-SP2(5.10.0):否
6.openEuler-22.03-LTS-SP3(5.10.0):否
7.master(6.1.0):否
8.openEuler-22.03-LTS-Next(5.10.0):否
9.openEuler-24.03-LTS:否
10.openEuler-24.03-LTS-Next:否

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2024-1649