cve-2024-53057
Vulnerability from cvelistv5
Published
2024-11-19 17:19
Modified
2024-12-19 09:38
Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
net/sched: stop qdisc_tree_reduce_backlog on TC_H_ROOT
In qdisc_tree_reduce_backlog, Qdiscs with major handle ffff: are assumed
to be either root or ingress. This assumption is bogus since it's valid
to create egress qdiscs with major handle ffff:
Budimir Markovic found that for qdiscs like DRR that maintain an active
class list, it will cause a UAF with a dangling class pointer.
In 066a3b5b2346, the concern was to avoid iterating over the ingress
qdisc since its parent is itself. The proper fix is to stop when parent
TC_H_ROOT is reached because the only way to retrieve ingress is when a
hierarchy which does not contain a ffff: major handle call into
qdisc_lookup with TC_H_MAJ(TC_H_ROOT).
In the scenario where major ffff: is an egress qdisc in any of the tree
levels, the updates will also propagate to TC_H_ROOT, which then the
iteration must stop.
net/sched/sch_api.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| ▼ | Linux | Linux |
Version: 066a3b5b2346febf9a655b444567b7138e3bb939 Version: 066a3b5b2346febf9a655b444567b7138e3bb939 Version: 066a3b5b2346febf9a655b444567b7138e3bb939 Version: 066a3b5b2346febf9a655b444567b7138e3bb939 Version: 066a3b5b2346febf9a655b444567b7138e3bb939 Version: 066a3b5b2346febf9a655b444567b7138e3bb939 Version: 066a3b5b2346febf9a655b444567b7138e3bb939 Version: 066a3b5b2346febf9a655b444567b7138e3bb939 |
||||||
|
|||||||||
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The proper fix is to stop when parent\\nTC_H_ROOT is reached because the only way to retrieve ingress is when a\\nhierarchy which does not contain a ffff: major handle call into\\nqdisc_lookup with TC_H_MAJ(TC_H_ROOT).\\n\\nIn the scenario where major ffff: is an egress qdisc in any of the tree\\nlevels, the updates will also propagate to TC_H_ROOT, which then the\\niteration must stop.\\n\\n\\n net/sched/sch_api.c | 2 +-\\n 1 file changed, 1 insertion(+), 1 deletion(-)\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/sched: stop qdisc_tree_reduce_backlog en TC_H_ROOT En qdisc_tree_reduce_backlog, se supone que las Qdisc con el identificador principal ffff: son ra\u00edz o de entrada. Esta suposici\u00f3n es falsa ya que es v\u00e1lido crear qdiscs de salida con el identificador principal ffff: Budimir Markovic descubri\u00f3 que para las qdisc como DRR que mantienen una lista de clases activa, provocar\u00e1 un UAF con un puntero de clase colgante. En 066a3b5b2346, la preocupaci\u00f3n era evitar iterar sobre la qdisc de entrada ya que su padre es ella misma. La soluci\u00f3n adecuada es detener cuando se alcanza el padre TC_H_ROOT porque la \u00fanica forma de recuperar la entrada es cuando una jerarqu\u00eda que no contiene un identificador principal ffff: llama a qdisc_lookup con TC_H_MAJ(TC_H_ROOT). En el escenario donde el ffff principal es una qdisc de salida en cualquiera de los niveles del \u00e1rbol, las actualizaciones tambi\u00e9n se propagar\u00e1n a TC_H_ROOT, donde luego la iteraci\u00f3n debe detenerse. net/sched/sch_api.c | 2 +- 1 archivo modificado, 1 inserci\u00f3n(+), 1 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\"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-12-11T14:25:24.771Z\"}}], \"cna\": {\"title\": \"net/sched: stop qdisc_tree_reduce_backlog on TC_H_ROOT\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"066a3b5b2346febf9a655b444567b7138e3bb939\", \"lessThan\": \"e7f9a6f97eb067599a74f3bcb6761976b0ed303e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"066a3b5b2346febf9a655b444567b7138e3bb939\", \"lessThan\": \"dbe778b08b5101df9e89bc06e0a3a7ecd2f4ef20\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"066a3b5b2346febf9a655b444567b7138e3bb939\", \"lessThan\": \"ce691c814bc7a3c30c220ffb5b7422715458fd9b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"066a3b5b2346febf9a655b444567b7138e3bb939\", \"lessThan\": \"05df1b1dff8f197f1c275b57ccb2ca33021df552\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"066a3b5b2346febf9a655b444567b7138e3bb939\", \"lessThan\": \"580b3189c1972aff0f993837567d36392e9d981b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"066a3b5b2346febf9a655b444567b7138e3bb939\", \"lessThan\": \"597cf9748c3477bf61bc35f0634129f56764ad24\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"066a3b5b2346febf9a655b444567b7138e3bb939\", \"lessThan\": \"9995909615c3431a5304c1210face5f268d24dba\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"066a3b5b2346febf9a655b444567b7138e3bb939\", \"lessThan\": \"2e95c4384438adeaa772caa560244b1a2efef816\", \"versionType\": \"git\"}], \"programFiles\": [\"net/sched/sch_api.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.25\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.25\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.19.323\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.285\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.229\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.171\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.116\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.60\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11.7\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.11.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/sched/sch_api.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/e7f9a6f97eb067599a74f3bcb6761976b0ed303e\"}, {\"url\": \"https://git.kernel.org/stable/c/dbe778b08b5101df9e89bc06e0a3a7ecd2f4ef20\"}, {\"url\": \"https://git.kernel.org/stable/c/ce691c814bc7a3c30c220ffb5b7422715458fd9b\"}, {\"url\": \"https://git.kernel.org/stable/c/05df1b1dff8f197f1c275b57ccb2ca33021df552\"}, {\"url\": \"https://git.kernel.org/stable/c/580b3189c1972aff0f993837567d36392e9d981b\"}, {\"url\": \"https://git.kernel.org/stable/c/597cf9748c3477bf61bc35f0634129f56764ad24\"}, {\"url\": \"https://git.kernel.org/stable/c/9995909615c3431a5304c1210face5f268d24dba\"}, {\"url\": \"https://git.kernel.org/stable/c/2e95c4384438adeaa772caa560244b1a2efef816\"}], \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/sched: stop qdisc_tree_reduce_backlog on TC_H_ROOT\\n\\nIn qdisc_tree_reduce_backlog, Qdiscs with major handle ffff: are assumed\\nto be either root or ingress. This assumption is bogus since it\u0027s valid\\nto create egress qdiscs with major handle ffff:\\nBudimir Markovic found that for qdiscs like DRR that maintain an active\\nclass list, it will cause a UAF with a dangling class pointer.\\n\\nIn 066a3b5b2346, the concern was to avoid iterating over the ingress\\nqdisc since its parent is itself. The proper fix is to stop when parent\\nTC_H_ROOT is reached because the only way to retrieve ingress is when a\\nhierarchy which does not contain a ffff: major handle call into\\nqdisc_lookup with TC_H_MAJ(TC_H_ROOT).\\n\\nIn the scenario where major ffff: is an egress qdisc in any of the tree\\nlevels, the updates will also propagate to TC_H_ROOT, which then the\\niteration must stop.\\n\\n\\n net/sched/sch_api.c | 2 +-\\n 1 file changed, 1 insertion(+), 1 deletion(-)\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T09:38:09.155Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2024-53057\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T09:38:09.155Z\", \"dateReserved\": \"2024-11-19T17:17:24.974Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-11-19T17:19:40.284Z\", \"assignerShortName\": \"Linux\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.