{ "dataType": "CVE_RECORD", "cveMetadata": { "cveId": "CVE-2023-52443", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-20T12:30:33.291Z", "datePublished": "2024-02-22T16:13:31.154Z", "dateUpdated": "2024-08-02T22:55:41.517Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-05-28T19:49:30.886Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: avoid crash when parsed profile name is empty\n\nWhen processing a packed profile in unpack_profile() described like\n\n \"profile :ns::samba-dcerpcd /usr/lib*/samba/{,samba/}samba-dcerpcd {...}\"\n\na string \":samba-dcerpcd\" is unpacked as a fully-qualified name and then\npassed to aa_splitn_fqname().\n\naa_splitn_fqname() treats \":samba-dcerpcd\" as only containing a namespace.\nThus it returns NULL for tmpname, meanwhile tmpns is non-NULL. Later\naa_alloc_profile() crashes as the new profile name is NULL now.\n\ngeneral protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nCPU: 6 PID: 1657 Comm: apparmor_parser Not tainted 6.7.0-rc2-dirty #16\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014\nRIP: 0010:strlen+0x1e/0xa0\nCall Trace:\n \n ? strlen+0x1e/0xa0\n aa_policy_init+0x1bb/0x230\n aa_alloc_profile+0xb1/0x480\n unpack_profile+0x3bc/0x4960\n aa_unpack+0x309/0x15e0\n aa_replace_profiles+0x213/0x33c0\n policy_update+0x261/0x370\n profile_replace+0x20e/0x2a0\n vfs_write+0x2af/0xe00\n ksys_write+0x126/0x250\n do_syscall_64+0x46/0xf0\n entry_SYSCALL_64_after_hwframe+0x6e/0x76\n \n---[ end trace 0000000000000000 ]---\nRIP: 0010:strlen+0x1e/0xa0\n\nIt seems such behaviour of aa_splitn_fqname() is expected and checked in\nother places where it is called (e.g. aa_remove_profiles). Well, there\nis an explicit comment \"a ns name without a following profile is allowed\"\ninside.\n\nAFAICS, nothing can prevent unpacked \"name\" to be in form like\n\":samba-dcerpcd\" - it is passed from userspace.\n\nDeny the whole profile set replacement in such case and inform user with\nEPROTO and an explaining message.\n\nFound by Linux Verification Center (linuxtesting.org)." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "security/apparmor/policy_unpack.c" ], "versions": [ { "version": "04dc715e24d0", "lessThan": "9286ee97aa48", "status": "affected", "versionType": "git" }, { "version": "04dc715e24d0", "lessThan": "1d8e62b5569c", "status": "affected", "versionType": "git" }, { "version": "04dc715e24d0", "lessThan": "5ff00408e502", "status": "affected", "versionType": "git" }, { "version": "04dc715e24d0", "lessThan": "0a12db736edb", "status": "affected", "versionType": "git" }, { "version": "04dc715e24d0", "lessThan": "9d4fa5fe2b1d", "status": "affected", "versionType": "git" }, { "version": "04dc715e24d0", "lessThan": "5c0392fdafb0", "status": "affected", "versionType": "git" }, { "version": "04dc715e24d0", "lessThan": "77ab09b92f16", "status": "affected", "versionType": "git" }, { "version": "04dc715e24d0", "lessThan": "55a8210c9e7d", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "security/apparmor/policy_unpack.c" ], "versions": [ { "version": "4.11", "status": "affected" }, { "version": "0", "lessThan": "4.11", "status": "unaffected", "versionType": "custom" }, { "version": "4.19.306", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.4.268", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.209", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.148", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.1.75", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.6.14", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.7.2", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.8", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/9286ee97aa4803d99185768735011d0d65827c9e" }, { "url": "https://git.kernel.org/stable/c/1d8e62b5569cc1466ceb8a7e4872cf10160a9dcf" }, { "url": "https://git.kernel.org/stable/c/5ff00408e5029d3550ee77f62dc15f1e15c47f87" }, { "url": "https://git.kernel.org/stable/c/0a12db736edbb4933e4274932aeea594b5876fa4" }, { "url": "https://git.kernel.org/stable/c/9d4fa5fe2b1d56662afd14915a73b4d0783ffa45" }, { "url": "https://git.kernel.org/stable/c/5c0392fdafb0a2321311900be83ffa572bef8203" }, { "url": "https://git.kernel.org/stable/c/77ab09b92f16c8439a948d1af489196953dc4a0e" }, { "url": "https://git.kernel.org/stable/c/55a8210c9e7d21ff2644809699765796d4bfb200" }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html" } ], "title": "apparmor: avoid crash when parsed profile name is empty", "x_generator": { "engine": "bippy-a5840b7849dd" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2023-52443", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-02-22T18:29:41.510350Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-07-05T17:21:01.497Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T22:55:41.517Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/9286ee97aa4803d99185768735011d0d65827c9e", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/1d8e62b5569cc1466ceb8a7e4872cf10160a9dcf", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/5ff00408e5029d3550ee77f62dc15f1e15c47f87", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/0a12db736edbb4933e4274932aeea594b5876fa4", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/9d4fa5fe2b1d56662afd14915a73b4d0783ffa45", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/5c0392fdafb0a2321311900be83ffa572bef8203", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/77ab09b92f16c8439a948d1af489196953dc4a0e", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/55a8210c9e7d21ff2644809699765796d4bfb200", "tags": [ "x_transferred" ] }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html", "tags": [ "x_transferred" ] }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html", "tags": [ "x_transferred" ] } ] } ] }, "dataVersion": "5.1" }