Vulnerability-Lookup

GHSA-WJ9Q-G984-CX8G

Vulnerability from github – Published: 2022-05-24 17:03 – Updated: 2023-01-30 21:30

Details

OpenBSD through 6.6 allows local users to escalate to root because a check for LD_LIBRARY_PATH in setuid programs can be defeated by setting a very small RLIMIT_DATA resource limit. When executing chpass or passwd (which are setuid root), _dl_setup_env in ld.so tries to strip LD_LIBRARY_PATH from the environment, but fails when it cannot allocate memory. Thus, the attacker is able to execute their own library code as root.

Severity

7.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2019-19726"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-269"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-12-12T01:15:00Z",
    "severity": "HIGH"
  },
  "details": "OpenBSD through 6.6 allows local users to escalate to root because a check for LD_LIBRARY_PATH in setuid programs can be defeated by setting a very small RLIMIT_DATA resource limit. When executing chpass or passwd (which are setuid root), _dl_setup_env in ld.so tries to strip LD_LIBRARY_PATH from the environment, but fails when it cannot allocate memory. Thus, the attacker is able to execute their own library code as root.",
  "id": "GHSA-wj9q-g984-cx8g",
  "modified": "2023-01-30T21:30:22Z",
  "published": "2022-05-24T17:03:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-19726"
    },
    {
      "type": "WEB",
      "url": "https://seclists.org/bugtraq/2019/Dec/25"
    },
    {
      "type": "WEB",
      "url": "https://www.openbsd.org/errata66.html"
    },
    {
      "type": "WEB",
      "url": "https://www.openwall.com/lists/oss-security/2019/12/11/9"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2019/Dec/31"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2023/Oct/11"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2023/10/03/2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2019-19726 (GCVE-0-2019-19726)

Vulnerability from cvelistv5 – Published: 2019-12-12 00:00 – Updated: 2024-08-05 02:25

Summary

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

9 references

URL	Tags
https://www.openbsd.org/errata66.html
https://www.openwall.com/lists/oss-security/2019/…
https://seclists.org/bugtraq/2019/Dec/25	mailing-list
http://packetstormsecurity.com/files/155658/Qualy…
http://seclists.org/fulldisclosure/2019/Dec/31	mailing-list
http://packetstormsecurity.com/files/155764/OpenB…
http://www.openwall.com/lists/oss-security/2023/10/03/2	mailing-list
http://seclists.org/fulldisclosure/2023/Oct/11	mailing-list
http://packetstormsecurity.com/files/174986/glibc…

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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.