CVE-2023-52885 (GCVE-0-2023-52885)

Vulnerability from cvelistv5 – Published: 2024-07-14 07:11 – Updated: 2025-05-04 07:45
VLAI?
Title
SUNRPC: Fix UAF in svc_tcp_listen_data_ready()
Summary
In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Fix UAF in svc_tcp_listen_data_ready() After the listener svc_sock is freed, and before invoking svc_tcp_accept() for the established child sock, there is a window that the newsock retaining a freed listener svc_sock in sk_user_data which cloning from parent. In the race window, if data is received on the newsock, we will observe use-after-free report in svc_tcp_listen_data_ready(). Reproduce by two tasks: 1. while :; do rpc.nfsd 0 ; rpc.nfsd; done 2. while :; do echo "" | ncat -4 127.0.0.1 2049 ; done KASAN report: ================================================================== BUG: KASAN: slab-use-after-free in svc_tcp_listen_data_ready+0x1cf/0x1f0 [sunrpc] Read of size 8 at addr ffff888139d96228 by task nc/102553 CPU: 7 PID: 102553 Comm: nc Not tainted 6.3.0+ #18 Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020 Call Trace: <IRQ> dump_stack_lvl+0x33/0x50 print_address_description.constprop.0+0x27/0x310 print_report+0x3e/0x70 kasan_report+0xae/0xe0 svc_tcp_listen_data_ready+0x1cf/0x1f0 [sunrpc] tcp_data_queue+0x9f4/0x20e0 tcp_rcv_established+0x666/0x1f60 tcp_v4_do_rcv+0x51c/0x850 tcp_v4_rcv+0x23fc/0x2e80 ip_protocol_deliver_rcu+0x62/0x300 ip_local_deliver_finish+0x267/0x350 ip_local_deliver+0x18b/0x2d0 ip_rcv+0x2fb/0x370 __netif_receive_skb_one_core+0x166/0x1b0 process_backlog+0x24c/0x5e0 __napi_poll+0xa2/0x500 net_rx_action+0x854/0xc90 __do_softirq+0x1bb/0x5de do_softirq+0xcb/0x100 </IRQ> <TASK> ... </TASK> Allocated by task 102371: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 __kasan_kmalloc+0x7b/0x90 svc_setup_socket+0x52/0x4f0 [sunrpc] svc_addsock+0x20d/0x400 [sunrpc] __write_ports_addfd+0x209/0x390 [nfsd] write_ports+0x239/0x2c0 [nfsd] nfsctl_transaction_write+0xac/0x110 [nfsd] vfs_write+0x1c3/0xae0 ksys_write+0xed/0x1c0 do_syscall_64+0x38/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc Freed by task 102551: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 kasan_save_free_info+0x2a/0x50 __kasan_slab_free+0x106/0x190 __kmem_cache_free+0x133/0x270 svc_xprt_free+0x1e2/0x350 [sunrpc] svc_xprt_destroy_all+0x25a/0x440 [sunrpc] nfsd_put+0x125/0x240 [nfsd] nfsd_svc+0x2cb/0x3c0 [nfsd] write_threads+0x1ac/0x2a0 [nfsd] nfsctl_transaction_write+0xac/0x110 [nfsd] vfs_write+0x1c3/0xae0 ksys_write+0xed/0x1c0 do_syscall_64+0x38/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc Fix the UAF by simply doing nothing in svc_tcp_listen_data_ready() if state != TCP_LISTEN, that will avoid dereferencing svsk for all child socket.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: fa9251afc33c81606d70cfe91800a779096442ec , < c7b8c2d06e437639694abe76978e915cfb73f428 (git)
Affected: fa9251afc33c81606d70cfe91800a779096442ec , < dfc896c4a75cb8cd7cb2dfd9b469cf1e3f004254 (git)
Affected: fa9251afc33c81606d70cfe91800a779096442ec , < 42725e5c1b181b757ba11d804443922982334d9b (git)
Affected: fa9251afc33c81606d70cfe91800a779096442ec , < cd5ec3ee52ce4b7e283cc11facfa420c297c8065 (git)
Affected: fa9251afc33c81606d70cfe91800a779096442ec , < fbf4ace39b2e4f3833236afbb2336edbafd75eee (git)
Affected: fa9251afc33c81606d70cfe91800a779096442ec , < ef047411887ff0845afd642d6a687819308e1a4e (git)
Affected: fa9251afc33c81606d70cfe91800a779096442ec , < 7e1f989055622fd086c5dfb291fc72adf5660b6f (git)
Affected: fa9251afc33c81606d70cfe91800a779096442ec , < fc80fc2d4e39137869da3150ee169b40bf879287 (git)
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    Linux Linux Affected: 4.8
Unaffected: 0 , < 4.8 (semver)
Unaffected: 4.14.322 , ≤ 4.14.* (semver)
Unaffected: 4.19.291 , ≤ 4.19.* (semver)
Unaffected: 5.4.251 , ≤ 5.4.* (semver)
Unaffected: 5.10.188 , ≤ 5.10.* (semver)
Unaffected: 5.15.121 , ≤ 5.15.* (semver)
Unaffected: 6.1.39 , ≤ 6.1.* (semver)
Unaffected: 6.4.4 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
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[{\"status\": \"affected\", \"version\": \"fa9251afc33c81606d70cfe91800a779096442ec\", \"lessThan\": \"c7b8c2d06e437639694abe76978e915cfb73f428\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"fa9251afc33c81606d70cfe91800a779096442ec\", \"lessThan\": \"dfc896c4a75cb8cd7cb2dfd9b469cf1e3f004254\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"fa9251afc33c81606d70cfe91800a779096442ec\", \"lessThan\": \"42725e5c1b181b757ba11d804443922982334d9b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"fa9251afc33c81606d70cfe91800a779096442ec\", \"lessThan\": \"cd5ec3ee52ce4b7e283cc11facfa420c297c8065\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"fa9251afc33c81606d70cfe91800a779096442ec\", \"lessThan\": \"fbf4ace39b2e4f3833236afbb2336edbafd75eee\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"fa9251afc33c81606d70cfe91800a779096442ec\", \"lessThan\": \"ef047411887ff0845afd642d6a687819308e1a4e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"fa9251afc33c81606d70cfe91800a779096442ec\", \"lessThan\": \"7e1f989055622fd086c5dfb291fc72adf5660b6f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"fa9251afc33c81606d70cfe91800a779096442ec\", \"lessThan\": \"fc80fc2d4e39137869da3150ee169b40bf879287\", \"versionType\": \"git\"}], \"programFiles\": [\"net/sunrpc/svcsock.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.8\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.8\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.14.322\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.291\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.251\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.188\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.121\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.39\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.4.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.4.*\"}, {\"status\": \"unaffected\", \"version\": \"6.5\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/sunrpc/svcsock.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/c7b8c2d06e437639694abe76978e915cfb73f428\"}, {\"url\": 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freed listener svc_sock in sk_user_data which cloning from\\nparent. In the race window, if data is received on the newsock, we will\\nobserve use-after-free report in svc_tcp_listen_data_ready().\\n\\nReproduce by two tasks:\\n\\n1. while :; do rpc.nfsd 0 ; rpc.nfsd; done\\n2. while :; do echo \\\"\\\" | ncat -4 127.0.0.1 2049 ; done\\n\\nKASAN report:\\n\\n  ==================================================================\\n  BUG: KASAN: slab-use-after-free in svc_tcp_listen_data_ready+0x1cf/0x1f0 [sunrpc]\\n  Read of size 8 at addr ffff888139d96228 by task nc/102553\\n  CPU: 7 PID: 102553 Comm: nc Not tainted 6.3.0+ #18\\n  Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020\\n  Call Trace:\\n   \u003cIRQ\u003e\\n   dump_stack_lvl+0x33/0x50\\n   print_address_description.constprop.0+0x27/0x310\\n   print_report+0x3e/0x70\\n   kasan_report+0xae/0xe0\\n   svc_tcp_listen_data_ready+0x1cf/0x1f0 [sunrpc]\\n   tcp_data_queue+0x9f4/0x20e0\\n   tcp_rcv_established+0x666/0x1f60\\n   tcp_v4_do_rcv+0x51c/0x850\\n   tcp_v4_rcv+0x23fc/0x2e80\\n   ip_protocol_deliver_rcu+0x62/0x300\\n   ip_local_deliver_finish+0x267/0x350\\n   ip_local_deliver+0x18b/0x2d0\\n   ip_rcv+0x2fb/0x370\\n   __netif_receive_skb_one_core+0x166/0x1b0\\n   process_backlog+0x24c/0x5e0\\n   __napi_poll+0xa2/0x500\\n   net_rx_action+0x854/0xc90\\n   __do_softirq+0x1bb/0x5de\\n   do_softirq+0xcb/0x100\\n   \u003c/IRQ\u003e\\n   \u003cTASK\u003e\\n   ...\\n   \u003c/TASK\u003e\\n\\n  Allocated by task 102371:\\n   kasan_save_stack+0x1e/0x40\\n   kasan_set_track+0x21/0x30\\n   __kasan_kmalloc+0x7b/0x90\\n   svc_setup_socket+0x52/0x4f0 [sunrpc]\\n   svc_addsock+0x20d/0x400 [sunrpc]\\n   __write_ports_addfd+0x209/0x390 [nfsd]\\n   write_ports+0x239/0x2c0 [nfsd]\\n   nfsctl_transaction_write+0xac/0x110 [nfsd]\\n   vfs_write+0x1c3/0xae0\\n   ksys_write+0xed/0x1c0\\n   do_syscall_64+0x38/0x90\\n   entry_SYSCALL_64_after_hwframe+0x72/0xdc\\n\\n  Freed by task 102551:\\n   kasan_save_stack+0x1e/0x40\\n   kasan_set_track+0x21/0x30\\n   kasan_save_free_info+0x2a/0x50\\n   __kasan_slab_free+0x106/0x190\\n   __kmem_cache_free+0x133/0x270\\n   svc_xprt_free+0x1e2/0x350 [sunrpc]\\n   svc_xprt_destroy_all+0x25a/0x440 [sunrpc]\\n   nfsd_put+0x125/0x240 [nfsd]\\n   nfsd_svc+0x2cb/0x3c0 [nfsd]\\n   write_threads+0x1ac/0x2a0 [nfsd]\\n   nfsctl_transaction_write+0xac/0x110 [nfsd]\\n   vfs_write+0x1c3/0xae0\\n   ksys_write+0xed/0x1c0\\n   do_syscall_64+0x38/0x90\\n   entry_SYSCALL_64_after_hwframe+0x72/0xdc\\n\\nFix the UAF by simply doing nothing in svc_tcp_listen_data_ready()\\nif state != TCP_LISTEN, that will avoid dereferencing svsk for all\\nchild socket.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.322\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.291\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.251\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.188\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.121\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.39\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.4.4\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.5\", \"versionStartIncluding\": \"4.8\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:45:19.723Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-52885\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T07:45:19.723Z\", \"dateReserved\": \"2024-05-21T15:35:00.782Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-14T07:11:28.548Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.