Vulnerability-Lookup

GHSA-7635-X5F9-5458

Vulnerability from github – Published: 2023-11-06 18:30 – Updated: 2025-11-04 00:30

Details

A flaw was found in OpenSC packages that allow a potential PIN bypass. When a token/card is authenticated by one process, it can perform cryptographic operations in other processes when an empty zero-length pin is passed. This issue poses a security risk, particularly for OS logon/screen unlock and for small, permanently connected tokens to computers. Additionally, the token can internally track login status. This flaw allows an attacker to gain unauthorized access, carry out malicious actions, or compromise the system without the user's awareness.

Severity

6.6 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2023-40660"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287",
      "CWE-327"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-11-06T17:15:11Z",
    "severity": "MODERATE"
  },
  "details": "A flaw was found in OpenSC packages that allow a potential PIN bypass. When a token/card is authenticated by one process, it can perform cryptographic operations in other processes when an empty zero-length pin is passed. This issue poses a security risk, particularly for OS logon/screen unlock and for small, permanently connected tokens to computers. Additionally, the token can internally track login status. This flaw allows an attacker to gain unauthorized access, carry out malicious actions, or compromise the system without the user\u0027s awareness.",
  "id": "GHSA-7635-x5f9-5458",
  "modified": "2025-11-04T00:30:41Z",
  "published": "2023-11-06T18:30:19Z",
  "references": [
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-40660"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OpenSC/OpenSC/issues/2792#issuecomment-1674806651"
    },
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      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2023:7876"
    },
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    },
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    },
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      "type": "WEB",
      "url": "https://github.com/OpenSC/OpenSC/releases/tag/0.24.0-rc1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OpenSC/OpenSC/wiki/OpenSC-security-advisories"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2023/11/msg00024.html"
    },
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      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/12/msg00026.html"
    },
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      "type": "WEB",
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    },
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      "type": "WEB",
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  "severity": [
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      "type": "CVSS_V3"
    }
  ]
}

CVE-2023-40660 (GCVE-0-2023-40660)

Vulnerability from cvelistv5 – Published: 2023-11-06 16:58 – Updated: 2025-11-06 22:59

Title

Opensc: potential pin bypass when card tracks its own login state

Summary

Severity

6.6 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2023-12-19 17:10 UTC

CWE

CWE-287 - Improper Authentication

Assigner

redhat redhat root

References

12 references

URL	Tags
https://access.redhat.com/errata/RHSA-2023:7876	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:7879	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2023-40660	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2240912	issue-trackingx_refsource_REDHAT
https://github.com/OpenSC/OpenSC/issues/2792#issu…
https://github.com/OpenSC/OpenSC/releases/tag/0.2…
https://github.com/OpenSC/OpenSC/wiki/OpenSC-secu…
http://www.openwall.com/lists/oss-security/2023/12/13/2	x_transferred
https://lists.debian.org/debian-lts-announce/2023…	x_transferred
https://lists.fedoraproject.org/archives/list/pac…	x_transferred
https://lists.fedoraproject.org/archives/list/pac…	x_transferred
https://lists.debian.org/debian-lts-announce/2024…

Impacted products

4 products

Vendor	Product	Version
		Affected: 0.17.0 , < 0.24.0 (semver)
Red Hat	Red Hat Enterprise Linux 8	Unaffected: 0:0.20.0-7.el8_9 , < * (rpm) cpe:/o:redhat:enterprise_linux:8::baseos
Red Hat	Red Hat Enterprise Linux 9	Unaffected: 0:0.23.0-3.el9_3 , < * (rpm) cpe:/o:redhat:enterprise_linux:9::baseos
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7

Date Public

2023-09-25 00:00

Credits

Upstream acknowledges Deepanjan Pal (Oracle Corporation) as the original reporter.

Show details on NVD website

JSON

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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.

Detection rules are retrieved from Rulezet.

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.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.