Vulnerability-Lookup

GHSA-2C4F-VGWR-82Q6

Vulnerability from github – Published: 2023-07-21 21:30 – Updated: 2024-04-04 06:18

Details

A missing allocation check in sftp server processing read requests may cause a NULL dereference on low-memory conditions. The malicious client can request up to 4GB SFTP reads, causing allocation of up to 4GB buffers, which was not being checked for failure. This will likely crash the authenticated user's sftp server connection (if implemented as forking as recommended). For thread-based servers, this might also cause DoS for legitimate users.

Given this code is not in any released versions, no security releases have been issued.

Severity

3.1 (Low)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2023-3603"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476",
      "CWE-770"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-07-21T20:15:16Z",
    "severity": "MODERATE"
  },
  "details": "A missing allocation check in sftp server processing read requests may cause a NULL dereference on low-memory conditions. The malicious client can request up to 4GB SFTP reads, causing allocation of up to 4GB buffers, which was not being checked for failure. This will likely crash the authenticated user\u0027s sftp server connection (if implemented as forking as recommended). For thread-based servers, this might also cause DoS for legitimate users.\n\nGiven this code is not in any released versions, no security releases have been issued.",
  "id": "GHSA-2c4f-vgwr-82q6",
  "modified": "2024-04-04T06:18:44Z",
  "published": "2023-07-21T21:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-3603"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2023-3603"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2221791"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2023-3603 (GCVE-0-2023-3603)

Vulnerability from cvelistv5 – Published: 2023-07-21 19:09 – Updated: 2024-09-26 20:04

Title

Processing sftp server read may cause null dereference

Summary

Severity

3.1 (Low)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-26 20:04 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

redhat redhat root Scorecard

References

2 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2023-3603	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2221791	issue-trackingx_refsource_REDHAT

Impacted products

6 products

Vendor	Product	Version
n/a	libssh
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Fedora	Extra Packages for Enterprise Linux 7
Fedora	Fedora

Date Public

2023-07-10 00:00

Credits

Upstream acknowledges Wei Chong Tan as the original reporter.

Show details on NVD website

JSON

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          },
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    "dateReserved": "2023-07-10T18:21:21.431Z",
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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.

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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GHSA-2C4F-VGWR-82Q6

CVE-2023-3603 (GCVE-0-2023-3603)

Tags

Sightings

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