cve-2019-19726
Vulnerability from cvelistv5
Published
2019-12-12 00:00
Modified
2024-08-05 02:25
Severity ?
Summary
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.
References
cve@mitre.orghttp://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
cve@mitre.orghttp://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.htmlThird Party Advisory, VDB Entry
cve@mitre.orghttp://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html
cve@mitre.orghttp://seclists.org/fulldisclosure/2019/Dec/31Exploit, Mailing List, Third Party Advisory
cve@mitre.orghttp://seclists.org/fulldisclosure/2023/Oct/11
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2023/10/03/2
cve@mitre.orghttps://seclists.org/bugtraq/2019/Dec/25Exploit, Mailing List, Third Party Advisory
cve@mitre.orghttps://www.openbsd.org/errata66.htmlPatch, Vendor Advisory
cve@mitre.orghttps://www.openwall.com/lists/oss-security/2019/12/11/9Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.htmlThird Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2019/Dec/31Exploit, Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2023/Oct/11
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2023/10/03/2
af854a3a-2127-422b-91ae-364da2661108https://seclists.org/bugtraq/2019/Dec/25Exploit, Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.openbsd.org/errata66.htmlPatch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.openwall.com/lists/oss-security/2019/12/11/9Mailing List, Third Party Advisory
Impacted products
Vendor Product Version
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T02:25:12.567Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.openbsd.org/errata66.html"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.openwall.com/lists/oss-security/2019/12/11/9"
          },
          {
            "name": "20191212 Local Privilege Escalation in OpenBSD\u0027s dynamic loader (CVE-2019-19726)",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "https://seclists.org/bugtraq/2019/Dec/25"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html"
          },
          {
            "name": "20191213 Local Privilege Escalation in OpenBSD\u0027s dynamic loader (CVE-2019-19726)",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "http://seclists.org/fulldisclosure/2019/Dec/31"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html"
          },
          {
            "name": "[oss-security] 20231003 CVE-2023-4911: Local Privilege Escalation in the glibc\u0027s ld.so",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2023/10/03/2"
          },
          {
            "name": "20231005 CVE-2023-4911: Local Privilege Escalation in the glibc\u0027s ld.so",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "http://seclists.org/fulldisclosure/2023/Oct/11"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-10-06T16:06:13.389413",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://www.openbsd.org/errata66.html"
        },
        {
          "url": "https://www.openwall.com/lists/oss-security/2019/12/11/9"
        },
        {
          "name": "20191212 Local Privilege Escalation in OpenBSD\u0027s dynamic loader (CVE-2019-19726)",
          "tags": [
            "mailing-list"
          ],
          "url": "https://seclists.org/bugtraq/2019/Dec/25"
        },
        {
          "url": "http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html"
        },
        {
          "name": "20191213 Local Privilege Escalation in OpenBSD\u0027s dynamic loader (CVE-2019-19726)",
          "tags": [
            "mailing-list"
          ],
          "url": "http://seclists.org/fulldisclosure/2019/Dec/31"
        },
        {
          "url": "http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html"
        },
        {
          "name": "[oss-security] 20231003 CVE-2023-4911: Local Privilege Escalation in the glibc\u0027s ld.so",
          "tags": [
            "mailing-list"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2023/10/03/2"
        },
        {
          "name": "20231005 CVE-2023-4911: Local Privilege Escalation in the glibc\u0027s ld.so",
          "tags": [
            "mailing-list"
          ],
          "url": "http://seclists.org/fulldisclosure/2023/Oct/11"
        },
        {
          "url": "http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2019-19726",
    "datePublished": "2019-12-12T00:00:00",
    "dateReserved": "2019-12-11T00:00:00",
    "dateUpdated": "2024-08-05T02:25:12.567Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2019-19726\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2019-12-12T01:15:10.823\",\"lastModified\":\"2024-11-21T04:35:15.750\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"},{\"lang\":\"es\",\"value\":\"OpenBSD  versiones hasta 6.6, permite a usuarios locales escalar a root porque una comprobaci\u00f3n de LD_LIBRARY_PATH en los programas setuid puede ser vencida estableciendo un l\u00edmite de recursos de RLIMIT_DATA muy peque\u00f1o. Al ejecutar chpass o passwd (que son root de setuid), en la funci\u00f3n  _dl_setup_env en el archivo ld.so intenta eliminar LD_LIBRARY_PATH del entorno, pero presenta un fallo cuando no puede asignar memoria. Por lo tanto, el atacante es capaz de ejecutar su propio c\u00f3digo de biblioteca como root.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:L/AC:L/Au:N/C:C/I:C/A:C\",\"baseScore\":7.2,\"accessVector\":\"LOCAL\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"COMPLETE\",\"integrityImpact\":\"COMPLETE\",\"availabilityImpact\":\"COMPLETE\"},\"baseSeverity\":\"HIGH\",\"exploitabilityScore\":3.9,\"impactScore\":10.0,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-269\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"6.6\",\"matchCriteriaId\":\"4586CE9D-A387-4255-8777-F1461913AD2B\"}]}]}],\"references\":[{\"url\":\"http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Exploit\",\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://seclists.org/fulldisclosure/2019/Dec/31\",\"source\":\"cve@mitre.org\",\"tags\":[\"Exploit\",\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://seclists.org/fulldisclosure/2023/Oct/11\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2023/10/03/2\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://seclists.org/bugtraq/2019/Dec/25\",\"source\":\"cve@mitre.org\",\"tags\":[\"Exploit\",\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://www.openbsd.org/errata66.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://www.openwall.com/lists/oss-security/2019/12/11/9\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://seclists.org/fulldisclosure/2019/Dec/31\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://seclists.org/fulldisclosure/2023/Oct/11\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2023/10/03/2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://seclists.org/bugtraq/2019/Dec/25\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://www.openbsd.org/errata66.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://www.openwall.com/lists/oss-security/2019/12/11/9\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.