Vulnerability-Lookup

GHSA-PQP2-HJWX-F6QP

Vulnerability from github – Published: 2024-08-17 12:30 – Updated: 2024-10-25 21:31

Details

In the Linux kernel, the following vulnerability has been resolved:

udf: Fix bogus checksum computation in udf_rename()

Syzbot reports uninitialized memory access in udf_rename() when updating checksum of '..' directory entry of a moved directory. This is indeed true as we pass on-stack diriter.fi to the udf_update_tag() and because that has only struct fileIdentDesc included in it and not the impUse or name fields, the checksumming function is going to checksum random stack contents beyond the end of the structure. This is actually harmless because the following udf_fiiter_write_fi() will recompute the checksum from on-disk buffers where everything is properly included. So all that is needed is just removing the bogus calculation.

Severity

3.3 (Low)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

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{
  "affected": [],
  "aliases": [
    "CVE-2024-43845"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-908"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-08-17T10:15:09Z",
    "severity": "LOW"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nudf: Fix bogus checksum computation in udf_rename()\n\nSyzbot reports uninitialized memory access in udf_rename() when updating\nchecksum of \u0027..\u0027 directory entry of a moved directory. This is indeed\ntrue as we pass on-stack diriter.fi to the udf_update_tag() and because\nthat has only struct fileIdentDesc included in it and not the impUse or\nname fields, the checksumming function is going to checksum random stack\ncontents beyond the end of the structure. This is actually harmless\nbecause the following udf_fiiter_write_fi() will recompute the checksum\nfrom on-disk buffers where everything is properly included. So all that\nis needed is just removing the bogus calculation.",
  "id": "GHSA-pqp2-hjwx-f6qp",
  "modified": "2024-10-25T21:31:26Z",
  "published": "2024-08-17T12:30:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-43845"
    },
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      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/27ab33854873e6fb958cb074681a0107cc2ecc4c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/40d7b3ed52449d36143bab8d3e70926aa61a60f4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9c439311c13fc6faab1921441165c9b8b500c83b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c996b570305e7a6910c2ce4cdcd4c22757ffe241"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe2ead240c31e8d158713beca9d0681a6e6a53ab"
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}

CVE-2024-43845 (GCVE-0-2024-43845)

Vulnerability from cvelistv5 – Published: 2024-08-17 09:21 – Updated: 2026-08-05 11:36

Title

udf: Fix bogus checksum computation in udf_rename()

Summary

In the Linux kernel, the following vulnerability has been resolved: udf: Fix bogus checksum computation in udf_rename() Syzbot reports uninitialized memory access in udf_rename() when updating checksum of '..' directory entry of a moved directory. This is indeed true as we pass on-stack diriter.fi to the udf_update_tag() and because that has only struct fileIdentDesc included in it and not the impUse or name fields, the checksumming function is going to checksum random stack contents beyond the end of the structure. This is actually harmless because the following udf_fiiter_write_fi() will recompute the checksum from on-disk buffers where everything is properly included. So all that is needed is just removing the bogus calculation.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 16:07 UTC

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6994 records in the last 180 days details

References

4 references

URL	Tags
https://git.kernel.org/stable/c/9c439311c13fc6faa…
https://git.kernel.org/stable/c/fe2ead240c31e8d15…
https://git.kernel.org/stable/c/40d7b3ed52449d361…
https://git.kernel.org/stable/c/27ab33854873e6fb9…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 626860c470ff88e5f7f22a282efd1bfe953a1b54 , < 9c439311c13fc6faab1921441165c9b8b500c83b (git) Affected: e9109a92d2a95889498bed3719cd2318892171a2 , < fe2ead240c31e8d158713beca9d0681a6e6a53ab (git) Affected: e9109a92d2a95889498bed3719cd2318892171a2 , < 40d7b3ed52449d36143bab8d3e70926aa61a60f4 (git) Affected: e9109a92d2a95889498bed3719cd2318892171a2 , < 27ab33854873e6fb958cb074681a0107cc2ecc4c (git)
Linux	Linux	Affected: 6.3 Unaffected: 0 , < 6.3 (semver) Unaffected: 6.6.44 , ≤ 6.6.* (semver) Unaffected: 6.10.3 , ≤ 6.10.* (semver) Unaffected: 6.11 , ≤ * (original_commit_for_fix)

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Sightings

Author	Source	Type	Date	Other

Nomenclature

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.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
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