CVE-2021-47309 (GCVE-0-2021-47309)
Vulnerability from cvelistv5
Published
2024-05-21 14:35
Modified
2025-05-04 07:08
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net: validate lwtstate->data before returning from skb_tunnel_info() skb_tunnel_info() returns pointer of lwtstate->data as ip_tunnel_info type without validation. lwtstate->data can have various types such as mpls_iptunnel_encap, etc and these are not compatible. So skb_tunnel_info() should validate before returning that pointer. Splat looks like: BUG: KASAN: slab-out-of-bounds in vxlan_get_route+0x418/0x4b0 [vxlan] Read of size 2 at addr ffff888106ec2698 by task ping/811 CPU: 1 PID: 811 Comm: ping Not tainted 5.13.0+ #1195 Call Trace: dump_stack_lvl+0x56/0x7b print_address_description.constprop.8.cold.13+0x13/0x2ee ? vxlan_get_route+0x418/0x4b0 [vxlan] ? vxlan_get_route+0x418/0x4b0 [vxlan] kasan_report.cold.14+0x83/0xdf ? vxlan_get_route+0x418/0x4b0 [vxlan] vxlan_get_route+0x418/0x4b0 [vxlan] [ ... ] vxlan_xmit_one+0x148b/0x32b0 [vxlan] [ ... ] vxlan_xmit+0x25c5/0x4780 [vxlan] [ ... ] dev_hard_start_xmit+0x1ae/0x6e0 __dev_queue_xmit+0x1f39/0x31a0 [ ... ] neigh_xmit+0x2f9/0x940 mpls_xmit+0x911/0x1600 [mpls_iptunnel] lwtunnel_xmit+0x18f/0x450 ip_finish_output2+0x867/0x2040 [ ... ]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2179d96ec702cc33ead02a9ce40ece599b8538c5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/67a9c94317402b826fc3db32afc8f39336803d97Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/83bdcfbd968bcc91a0632b7b625e4a9b0cba5e0dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8aa13a86964cdec4fd969ef677c6614ff068641aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8bb1589c89e61e3b182dd546f1021928ebb5c2a6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a915379594f1e045421635c6316d8f3ffa018c58Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b61d327cd3cc5ea591f3bf751dd11e034f388bb5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e7f3c9df40515a6c6b46f36c4c94cf48a043f887Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/2179d96ec702cc33ead02a9ce40ece599b8538c5Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/67a9c94317402b826fc3db32afc8f39336803d97Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/83bdcfbd968bcc91a0632b7b625e4a9b0cba5e0dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8aa13a86964cdec4fd969ef677c6614ff068641aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8bb1589c89e61e3b182dd546f1021928ebb5c2a6Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a915379594f1e045421635c6316d8f3ffa018c58Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b61d327cd3cc5ea591f3bf751dd11e034f388bb5Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e7f3c9df40515a6c6b46f36c4c94cf48a043f887Patch
Impacted products
Vendor Product Version
Linux Linux Version: 61adedf3e3f1d3f032c5a6a299978d91eff6d555
Version: 61adedf3e3f1d3f032c5a6a299978d91eff6d555
Version: 61adedf3e3f1d3f032c5a6a299978d91eff6d555
Version: 61adedf3e3f1d3f032c5a6a299978d91eff6d555
Version: 61adedf3e3f1d3f032c5a6a299978d91eff6d555
Version: 61adedf3e3f1d3f032c5a6a299978d91eff6d555
Version: 61adedf3e3f1d3f032c5a6a299978d91eff6d555
Version: 61adedf3e3f1d3f032c5a6a299978d91eff6d555
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   Linux Linux Version: 4.3
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    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47309\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-21T15:15:18.453\",\"lastModified\":\"2024-12-26T18:44:48.667\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: validate lwtstate-\u003edata before returning from skb_tunnel_info()\\n\\nskb_tunnel_info() returns pointer of lwtstate-\u003edata as ip_tunnel_info\\ntype without validation. lwtstate-\u003edata can have various types such as\\nmpls_iptunnel_encap, etc and these are not compatible.\\nSo skb_tunnel_info() should validate before returning that pointer.\\n\\nSplat looks like:\\nBUG: KASAN: slab-out-of-bounds in vxlan_get_route+0x418/0x4b0 [vxlan]\\nRead of size 2 at addr ffff888106ec2698 by task ping/811\\n\\nCPU: 1 PID: 811 Comm: ping Not tainted 5.13.0+ #1195\\nCall Trace:\\n dump_stack_lvl+0x56/0x7b\\n print_address_description.constprop.8.cold.13+0x13/0x2ee\\n ? vxlan_get_route+0x418/0x4b0 [vxlan]\\n ? vxlan_get_route+0x418/0x4b0 [vxlan]\\n kasan_report.cold.14+0x83/0xdf\\n ? vxlan_get_route+0x418/0x4b0 [vxlan]\\n vxlan_get_route+0x418/0x4b0 [vxlan]\\n [ ... ]\\n vxlan_xmit_one+0x148b/0x32b0 [vxlan]\\n [ ... ]\\n vxlan_xmit+0x25c5/0x4780 [vxlan]\\n [ ... ]\\n dev_hard_start_xmit+0x1ae/0x6e0\\n __dev_queue_xmit+0x1f39/0x31a0\\n [ ... ]\\n neigh_xmit+0x2f9/0x940\\n mpls_xmit+0x911/0x1600 [mpls_iptunnel]\\n lwtunnel_xmit+0x18f/0x450\\n ip_finish_output2+0x867/0x2040\\n [ ... ]\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net: validar lwtstate-\u0026gt;data antes de regresar de skb_tunnel_info() skb_tunnel_info() devuelve un puntero de lwtstate-\u0026gt;data como tipo ip_tunnel_info sin validaci\u00f3n. lwtstate-\u0026gt;data puede tener varios tipos como mpls_iptunnel_encap, etc. y estos no son compatibles. Entonces skb_tunnel_info() deber\u00eda validarse antes de devolver ese puntero. Splat se ve as\u00ed: BUG: KASAN: slab fuera de los l\u00edmites en vxlan_get_route+0x418/0x4b0 [vxlan] Lectura de tama\u00f1o 2 en la direcci\u00f3n ffff888106ec2698 mediante tarea ping/811 CPU: 1 PID: 811 Comm: ping No contaminado 5.13.0 + #1195 Seguimiento de llamadas: dump_stack_lvl+0x56/0x7b print_address_description.constprop.8.cold.13+0x13/0x2ee? vxlan_get_route+0x418/0x4b0 [vxlan] ? vxlan_get_route+0x418/0x4b0 [vxlan] kasan_report.cold.14+0x83/0xdf? vxlan_get_route+0x418/0x4b0 [vxlan] vxlan_get_route+0x418/0x4b0 [vxlan] [ ... ] vxlan_xmit_one+0x148b/0x32b0 [vxlan] [ ... ] vxlan_xmit+0x25c5/0x4780 [vxlan] [ ... ] +0x1ae /0x6e0 __dev_queue_xmit+0x1f39/0x31a0 [...] veck_xMit+0x2f9/0x940 mpls_xmit+0x911/0x1600 [mpls_iptunnel] lwtunnel_xmit+0x18f/0x450 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    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/e7f3c9df40515a6c6b46f36c4c94cf48a043f887\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/b61d327cd3cc5ea591f3bf751dd11e034f388bb5\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/83bdcfbd968bcc91a0632b7b625e4a9b0cba5e0d\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/8bb1589c89e61e3b182dd546f1021928ebb5c2a6\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/8aa13a86964cdec4fd969ef677c6614ff068641a\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/2179d96ec702cc33ead02a9ce40ece599b8538c5\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/a915379594f1e045421635c6316d8f3ffa018c58\", \"tags\": [\"x_transferred\"]}, {\"url\": 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\"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"61adedf3e3f1\", \"lessThan\": \"e7f3c9df4051\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"61adedf3e3f1\", \"lessThan\": \"b61d327cd3cc\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"61adedf3e3f1\", \"lessThan\": \"83bdcfbd968b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"61adedf3e3f1\", \"lessThan\": \"8bb1589c89e6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"61adedf3e3f1\", \"lessThan\": \"8aa13a86964c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"61adedf3e3f1\", \"lessThan\": \"2179d96ec702\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"61adedf3e3f1\", \"lessThan\": \"a915379594f1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"61adedf3e3f1\", \"lessThan\": \"67a9c9431740\", \"versionType\": \"git\"}], \"programFiles\": 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\"5.10.53\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13.5\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.13.*\"}, {\"status\": \"unaffected\", \"version\": \"5.14\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"include/net/dst_metadata.h\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/e7f3c9df40515a6c6b46f36c4c94cf48a043f887\"}, {\"url\": \"https://git.kernel.org/stable/c/b61d327cd3cc5ea591f3bf751dd11e034f388bb5\"}, {\"url\": \"https://git.kernel.org/stable/c/83bdcfbd968bcc91a0632b7b625e4a9b0cba5e0d\"}, {\"url\": \"https://git.kernel.org/stable/c/8bb1589c89e61e3b182dd546f1021928ebb5c2a6\"}, {\"url\": \"https://git.kernel.org/stable/c/8aa13a86964cdec4fd969ef677c6614ff068641a\"}, {\"url\": \"https://git.kernel.org/stable/c/2179d96ec702cc33ead02a9ce40ece599b8538c5\"}, {\"url\": \"https://git.kernel.org/stable/c/a915379594f1e045421635c6316d8f3ffa018c58\"}, {\"url\": \"https://git.kernel.org/stable/c/67a9c94317402b826fc3db32afc8f39336803d97\"}], \"x_generator\": {\"engine\": \"bippy-a5840b7849dd\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: validate lwtstate-\u003edata before returning from skb_tunnel_info()\\n\\nskb_tunnel_info() returns pointer of lwtstate-\u003edata as ip_tunnel_info\\ntype without validation. lwtstate-\u003edata can have various types such as\\nmpls_iptunnel_encap, etc and these are not compatible.\\nSo skb_tunnel_info() should validate before returning that pointer.\\n\\nSplat looks like:\\nBUG: KASAN: slab-out-of-bounds in vxlan_get_route+0x418/0x4b0 [vxlan]\\nRead of size 2 at addr ffff888106ec2698 by task ping/811\\n\\nCPU: 1 PID: 811 Comm: ping Not tainted 5.13.0+ #1195\\nCall Trace:\\n dump_stack_lvl+0x56/0x7b\\n print_address_description.constprop.8.cold.13+0x13/0x2ee\\n ? vxlan_get_route+0x418/0x4b0 [vxlan]\\n ? vxlan_get_route+0x418/0x4b0 [vxlan]\\n kasan_report.cold.14+0x83/0xdf\\n ? vxlan_get_route+0x418/0x4b0 [vxlan]\\n vxlan_get_route+0x418/0x4b0 [vxlan]\\n [ ... ]\\n vxlan_xmit_one+0x148b/0x32b0 [vxlan]\\n [ ... ]\\n vxlan_xmit+0x25c5/0x4780 [vxlan]\\n [ ... ]\\n dev_hard_start_xmit+0x1ae/0x6e0\\n __dev_queue_xmit+0x1f39/0x31a0\\n [ ... ]\\n neigh_xmit+0x2f9/0x940\\n mpls_xmit+0x911/0x1600 [mpls_iptunnel]\\n lwtunnel_xmit+0x18f/0x450\\n ip_finish_output2+0x867/0x2040\\n [ ... ]\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-05-29T05:05:42.863Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47309\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-08-04T05:32:08.596Z\", \"dateReserved\": \"2024-05-21T14:28:16.972Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T14:35:27.981Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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