CVE-2024-26633
Vulnerability from cvelistv5
Published
2024-03-18 10:07
Modified
2024-11-05 17:13
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
ip6_tunnel: fix NEXTHDR_FRAGMENT handling in ip6_tnl_parse_tlv_enc_lim()
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/135414f300c5db995e2a2f3bf0f455de9d014aee
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3f15ba3dc14e6ee002ea01b4faddc3d49200377c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4329426cf6b8e22b798db2331c7ef1dd2a9c748d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/62a1fedeb14c7ac0947ef33fadbabd35ed2400a2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/687c5d52fe53e602e76826dbd4d7af412747e183
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ba8d904c274268b18ef3dc11d3ca7b24a96cb087
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d375b98e0248980681e5e56b712026174d617198
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/da23bd709b46168f7dfc36055801011222b076cd
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26633\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-18T11:15:09.867\",\"lastModified\":\"2024-11-05T18:35:05.880\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nip6_tunnel: fix NEXTHDR_FRAGMENT handling in ip6_tnl_parse_tlv_enc_lim()\\n\\nsyzbot pointed out [1] that NEXTHDR_FRAGMENT handling is broken.\\n\\nReading frag_off can only be done if we pulled enough bytes\\nto skb-\u003ehead. Currently we might access garbage.\\n\\n[1]\\nBUG: KMSAN: uninit-value in ip6_tnl_parse_tlv_enc_lim+0x94f/0xbb0\\nip6_tnl_parse_tlv_enc_lim+0x94f/0xbb0\\nipxip6_tnl_xmit net/ipv6/ip6_tunnel.c:1326 [inline]\\nip6_tnl_start_xmit+0xab2/0x1a70 net/ipv6/ip6_tunnel.c:1432\\n__netdev_start_xmit include/linux/netdevice.h:4940 [inline]\\nnetdev_start_xmit include/linux/netdevice.h:4954 [inline]\\nxmit_one net/core/dev.c:3548 [inline]\\ndev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3564\\n__dev_queue_xmit+0x33b8/0x5130 net/core/dev.c:4349\\ndev_queue_xmit include/linux/netdevice.h:3134 [inline]\\nneigh_connected_output+0x569/0x660 net/core/neighbour.c:1592\\nneigh_output include/net/neighbour.h:542 [inline]\\nip6_finish_output2+0x23a9/0x2b30 net/ipv6/ip6_output.c:137\\nip6_finish_output+0x855/0x12b0 net/ipv6/ip6_output.c:222\\nNF_HOOK_COND include/linux/netfilter.h:303 [inline]\\nip6_output+0x323/0x610 net/ipv6/ip6_output.c:243\\ndst_output include/net/dst.h:451 [inline]\\nip6_local_out+0xe9/0x140 net/ipv6/output_core.c:155\\nip6_send_skb net/ipv6/ip6_output.c:1952 [inline]\\nip6_push_pending_frames+0x1f9/0x560 net/ipv6/ip6_output.c:1972\\nrawv6_push_pending_frames+0xbe8/0xdf0 net/ipv6/raw.c:582\\nrawv6_sendmsg+0x2b66/0x2e70 net/ipv6/raw.c:920\\ninet_sendmsg+0x105/0x190 net/ipv4/af_inet.c:847\\nsock_sendmsg_nosec net/socket.c:730 [inline]\\n__sock_sendmsg net/socket.c:745 [inline]\\n____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584\\n___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638\\n__sys_sendmsg net/socket.c:2667 [inline]\\n__do_sys_sendmsg net/socket.c:2676 [inline]\\n__se_sys_sendmsg net/socket.c:2674 [inline]\\n__x64_sys_sendmsg+0x307/0x490 net/socket.c:2674\\ndo_syscall_x64 arch/x86/entry/common.c:52 [inline]\\ndo_syscall_64+0x44/0x110 arch/x86/entry/common.c:83\\nentry_SYSCALL_64_after_hwframe+0x63/0x6b\\n\\nUninit was created at:\\nslab_post_alloc_hook+0x129/0xa70 mm/slab.h:768\\nslab_alloc_node mm/slub.c:3478 [inline]\\n__kmem_cache_alloc_node+0x5c9/0x970 mm/slub.c:3517\\n__do_kmalloc_node mm/slab_common.c:1006 [inline]\\n__kmalloc_node_track_caller+0x118/0x3c0 mm/slab_common.c:1027\\nkmalloc_reserve+0x249/0x4a0 net/core/skbuff.c:582\\npskb_expand_head+0x226/0x1a00 net/core/skbuff.c:2098\\n__pskb_pull_tail+0x13b/0x2310 net/core/skbuff.c:2655\\npskb_may_pull_reason include/linux/skbuff.h:2673 [inline]\\npskb_may_pull include/linux/skbuff.h:2681 [inline]\\nip6_tnl_parse_tlv_enc_lim+0x901/0xbb0 net/ipv6/ip6_tunnel.c:408\\nipxip6_tnl_xmit net/ipv6/ip6_tunnel.c:1326 [inline]\\nip6_tnl_start_xmit+0xab2/0x1a70 net/ipv6/ip6_tunnel.c:1432\\n__netdev_start_xmit include/linux/netdevice.h:4940 [inline]\\nnetdev_start_xmit include/linux/netdevice.h:4954 [inline]\\nxmit_one net/core/dev.c:3548 [inline]\\ndev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3564\\n__dev_queue_xmit+0x33b8/0x5130 net/core/dev.c:4349\\ndev_queue_xmit include/linux/netdevice.h:3134 [inline]\\nneigh_connected_output+0x569/0x660 net/core/neighbour.c:1592\\nneigh_output include/net/neighbour.h:542 [inline]\\nip6_finish_output2+0x23a9/0x2b30 net/ipv6/ip6_output.c:137\\nip6_finish_output+0x855/0x12b0 net/ipv6/ip6_output.c:222\\nNF_HOOK_COND include/linux/netfilter.h:303 [inline]\\nip6_output+0x323/0x610 net/ipv6/ip6_output.c:243\\ndst_output include/net/dst.h:451 [inline]\\nip6_local_out+0xe9/0x140 net/ipv6/output_core.c:155\\nip6_send_skb net/ipv6/ip6_output.c:1952 [inline]\\nip6_push_pending_frames+0x1f9/0x560 net/ipv6/ip6_output.c:1972\\nrawv6_push_pending_frames+0xbe8/0xdf0 net/ipv6/raw.c:582\\nrawv6_sendmsg+0x2b66/0x2e70 net/ipv6/raw.c:920\\ninet_sendmsg+0x105/0x190 net/ipv4/af_inet.c:847\\nsock_sendmsg_nosec net/socket.c:730 [inline]\\n__sock_sendmsg net/socket.c:745 [inline]\\n____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584\\n___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638\\n__sys_sendmsg net/socket.c:2667 [inline]\\n__do_sys_sendms\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: ip6_tunnel: corrige el manejo de NEXTHDR_FRAGMENT en ip6_tnl_parse_tlv_enc_lim() syzbot se\u00f1al\u00f3 [1] que el manejo de NEXTHDR_FRAGMENT no funciona. La lectura de frag_off solo se puede realizar si extraemos suficientes bytes para skb-\u0026gt;head. Actualmente podr\u00edamos acceder a basura. [1] ERROR: KMSAN: valor uninit en ip6_tnl_parse_tlv_enc_lim+0x94f/0xbb0 ip6_tnl_parse_tlv_enc_lim+0x94f/0xbb0 ipxip6_tnl_xmit net/ipv6/ip6_tunnel.c:1326 [en l\u00ednea] ip6_tnl_start_xmit+0x ab2/0x1a70 net/ipv6/ip6_tunnel.c:1432 __netdev_start_xmit incluye /linux/netdevice.h:4940 [en l\u00ednea] netdev_start_xmit include/linux/netdevice.h:4954 [en l\u00ednea] xmit_one net/core/dev.c:3548 [en l\u00ednea] dev_hard_start_xmit+0x247/0xa10 net/core/dev.c: 3564 __dev_queue_xmit+0x33b8/0x5130 net/core/dev.c:4349 dev_queue_xmit include/linux/netdevice.h:3134 [en l\u00ednea] neigh_connected_output+0x569/0x660 net/core/neighbour.c:1592 neigh_output include/net/neighbour.h :542 [en l\u00ednea] ip6_finish_output2+0x23a9/0x2b30 net/ipv6/ip6_output.c:137 ip6_finish_output+0x855/0x12b0 net/ipv6/ip6_output.c:222 NF_HOOK_COND include/linux/netfilter.h:303 [en l\u00ednea] ip6_output+0x3 23/ 0x610 net/ipv6/ip6_output.c:243 dst_output include/net/dst.h:451 [en l\u00ednea] ip6_local_out+0xe9/0x140 net/ipv6/output_core.c:155 ip6_send_skb net/ipv6/ip6_output.c:1952 [en l\u00ednea] ip6_push_pending_frames+0x1f9/0x560 net/ipv6/ip6_output.c:1972 rawv6_push_pending_frames+0xbe8/0xdf0 net/ipv6/raw.c:582 rawv6_sendmsg+0x2b66/0x2e70 net/ipv6/raw.c:920 inet_sendmsg+0 x105/0x190 neto/ipv4 /af_inet.c:847 sock_sendmsg_nosec net/socket.c:730 [en l\u00ednea] __sock_sendmsg net/socket.c:745 [en l\u00ednea] ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584 ___sys_sendmsg+0x28d/0x3c0 net/socket.c :2638 __sys_sendmsg net/socket.c:2667 [en l\u00ednea] __do_sys_sendmsg net/socket.c:2676 [en l\u00ednea] __se_sys_sendmsg net/socket.c:2674 [en l\u00ednea] __x64_sys_sendmsg+0x307/0x490 net/socket.c:267 4 do_syscall_x64 arco/ x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83 Entry_SYSCALL_64_after_hwframe+0x63/0x6b Uninit se cre\u00f3 en: slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768 slab_alloc_node mm/slub.c:3478 [en l\u00ednea] __kmem_cache_alloc_node+0x5c9/0x970 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1006 [en l\u00ednea] __kmalloc_node_track_caller+0x118/0x3c0 mm/slab_common.c :1027 kmalloc_reserve+0x249/ 0x4a0 net/core/skbuff.c:582 pskb_expand_head+0x226/0x1a00 net/core/skbuff.c:2098 __pskb_pull_tail+0x13b/0x2310 net/core/skbuff.c:2655 pskb_may_pull_reason include/linux/skbuff.h:2673 [en l\u00ednea ] pskb_may_pull include/linux/skbuff.h:2681 [en l\u00ednea] ip6_tnl_parse_tlv_enc_lim+0x901/0xbb0 net/ipv6/ip6_tunnel.c:408 ipxip6_tnl_xmit net/ipv6/ip6_tunnel.c:1326 [en l\u00ednea] ip6_tnl_start_xmit+0xab 2/0x1a70 neto/ipv6/ ip6_tunnel.c:1432 __netdev_start_xmit include/linux/netdevice.h:4940 [en l\u00ednea] netdev_start_xmit include/linux/netdevice.h:4954 [en l\u00ednea] xmit_one net/core/dev.c:3548 [en l\u00ednea] dev_hard_start_xmit+0x247/0xa10 net /core/dev.c:3564 __dev_queue_xmit+0x33b8/0x5130 net/core/dev.c:4349 dev_queue_xmit include/linux/netdevice.h:3134 [en l\u00ednea] neigh_connected_output+0x569/0x660 net/core/neighbour.c:1592 neigh_output include/net/neighbour.h:542 [en l\u00ednea] ip6_finish_output2+0x23a9/0x2b30 net/ipv6/ip6_output.c:137 ip6_finish_output+0x855/0x12b0 net/ipv6/ip6_output.c:222 NF_HOOK_COND include/linux/netfilter.h:303 [en l\u00ednea] ip6_output+0x323/0x610 net/ipv6/ip6_output.c:243 dst_output include/net/dst.h:451 [en l\u00ednea] ip6_local_out+0xe9/0x140 net/ipv6/output_core.c:155 ip6_send_skb net/ipv6/ip6_output .c:1952 [en l\u00ednea] ip6_push_pending_frames+0x1f9/0x560 net/ipv6/ip6_output.c:1972 rawv6_push_pending_frames+0xbe8/0xdf0 net/ipv6/raw.c:582 rawv6_sendmsg+0x2b66/0x2e70 net/ipv6/raw.c:9 20 inet_sendmsg +0x105/0x190 net/ipv4/af_inet.c:847 sock_sendmsg_nosec net/socket.c:730 [en l\u00ednea] __sock_sendmsg net/socket.c:745 [en l\u00ednea]---truncado---\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/135414f300c5db995e2a2f3bf0f455de9d014aee\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3f15ba3dc14e6ee002ea01b4faddc3d49200377c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4329426cf6b8e22b798db2331c7ef1dd2a9c748d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/62a1fedeb14c7ac0947ef33fadbabd35ed2400a2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/687c5d52fe53e602e76826dbd4d7af412747e183\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ba8d904c274268b18ef3dc11d3ca7b24a96cb087\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d375b98e0248980681e5e56b712026174d617198\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/da23bd709b46168f7dfc36055801011222b076cd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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