Vulnerability-Lookup

CERTFR-2026-AVI-0123

Vulnerability from certfr_avis - Published: 2026-02-06 - Updated: 2026-02-06

De multiples vulnérabilités ont été découvertes dans Asterisk. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, une élévation de privilèges et une atteinte à la confidentialité des données.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products

Vendor	Product	Description
Asterisk	Asterisk	Asterisk versions 21.12.x antérieures à 21.12.1
Asterisk	Asterisk	Asterisk versions 22.8.x antérieures à 22.8.2
Asterisk	Asterisk	Asterisk versions 20.18.x antérieures à 20.18.2
Asterisk	Asterisk	Asterisk versions 23.2.x antérieures à 23.2.2
Asterisk	Asterisk	Asterisk versions antérieures à 20.7-cert9

References

Title

Publication Time

Tags

Bulletin de sécurité Asterisk GHSA-v6hp-wh3r-cwxh	2026-02-05	vendor-advisory
Bulletin de sécurité Asterisk GHSA-xpc6-x892-v83c	2026-02-05	vendor-advisory
Bulletin de sécurité Asterisk GHSA-rvch-3jmx-3jf3	2026-02-05	vendor-advisory
Bulletin de sécurité Asterisk GHSA-85x7-54wr-vh42	2026-02-05	vendor-advisory

Show details on source website

JSON

To clipboard

{
  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [
    {
      "description": "Asterisk versions 21.12.x ant\u00e9rieures \u00e0 21.12.1",
      "product": {
        "name": "Asterisk",
        "vendor": {
          "name": "Asterisk",
          "scada": false
        }
      }
    },
    {
      "description": "Asterisk versions 22.8.x ant\u00e9rieures \u00e0 22.8.2",
      "product": {
        "name": "Asterisk",
        "vendor": {
          "name": "Asterisk",
          "scada": false
        }
      }
    },
    {
      "description": "Asterisk versions 20.18.x ant\u00e9rieures \u00e0 20.18.2",
      "product": {
        "name": "Asterisk",
        "vendor": {
          "name": "Asterisk",
          "scada": false
        }
      }
    },
    {
      "description": "Asterisk versions 23.2.x ant\u00e9rieures \u00e0 23.2.2",
      "product": {
        "name": "Asterisk",
        "vendor": {
          "name": "Asterisk",
          "scada": false
        }
      }
    },
    {
      "description": "Asterisk versions ant\u00e9rieures \u00e0 20.7-cert9",
      "product": {
        "name": "Asterisk",
        "vendor": {
          "name": "Asterisk",
          "scada": false
        }
      }
    }
  ],
  "affected_systems_content": "",
  "content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
  "cves": [
    {
      "name": "CVE-2026-23738",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-23738"
    },
    {
      "name": "CVE-2026-23741",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-23741"
    },
    {
      "name": "CVE-2026-23740",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-23740"
    },
    {
      "name": "CVE-2026-23739",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-23739"
    }
  ],
  "initial_release_date": "2026-02-06T00:00:00",
  "last_revision_date": "2026-02-06T00:00:00",
  "links": [],
  "reference": "CERTFR-2026-AVI-0123",
  "revisions": [
    {
      "description": "Version initiale",
      "revision_date": "2026-02-06T00:00:00.000000"
    }
  ],
  "risks": [
    {
      "description": "Injection de code indirecte \u00e0 distance (XSS)"
    },
    {
      "description": "Injection de requ\u00eates ill\u00e9gitimes par rebond (CSRF)"
    },
    {
      "description": "Ex\u00e9cution de code arbitraire \u00e0 distance"
    },
    {
      "description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
    },
    {
      "description": "\u00c9l\u00e9vation de privil\u00e8ges"
    }
  ],
  "summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Asterisk. Certaines d\u0027entre elles permettent \u00e0 un attaquant de provoquer une ex\u00e9cution de code arbitraire \u00e0 distance, une \u00e9l\u00e9vation de privil\u00e8ges et une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es.",
  "title": "Multiples vuln\u00e9rabilit\u00e9s dans Asterisk",
  "vendor_advisories": [
    {
      "published_at": "2026-02-05",
      "title": "Bulletin de s\u00e9curit\u00e9 Asterisk GHSA-v6hp-wh3r-cwxh",
      "url": "https://github.com/asterisk/asterisk/security/advisories/GHSA-v6hp-wh3r-cwxh"
    },
    {
      "published_at": "2026-02-05",
      "title": "Bulletin de s\u00e9curit\u00e9 Asterisk GHSA-xpc6-x892-v83c",
      "url": "https://github.com/asterisk/asterisk/security/advisories/GHSA-xpc6-x892-v83c"
    },
    {
      "published_at": "2026-02-05",
      "title": "Bulletin de s\u00e9curit\u00e9 Asterisk GHSA-rvch-3jmx-3jf3",
      "url": "https://github.com/asterisk/asterisk/security/advisories/GHSA-rvch-3jmx-3jf3"
    },
    {
      "published_at": "2026-02-05",
      "title": "Bulletin de s\u00e9curit\u00e9 Asterisk GHSA-85x7-54wr-vh42",
      "url": "https://github.com/asterisk/asterisk/security/advisories/GHSA-85x7-54wr-vh42"
    }
  ]
}

CVE-2026-23741 (GCVE-0-2026-23741)

Vulnerability from cvelistv5 – Published: 2026-02-06 16:47 – Updated: 2026-02-06 17:26

Title

ast_coredumper running as root sources ast_debug_tools.conf from /etc/asterisk; potentially leading to privilege escalation

Summary

Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, the asterisk/contrib/scripts/ast_coredumper runs as root, as noted by the NOTES tag on line 689 of the ast_coredumper file. The script will source the contents of /etc/asterisk/ast_debug_tools.conf, which resides in a folder that is writeable by the asterisk user:group. Due to the /etc/asterisk/ast_debug_tools.conf file following bash semantics and it being loaded; an attacker with write permissions may add or modify the file such that when the root ast_coredumper is run; it would source and thereby execute arbitrary bash code found in the /etc/asterisk/ast_debug_tools.conf. This issue has been patched in versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2.

Severity ?

0 (None)


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

CWE

CWE-427 - Uncontrolled Search Path Element

Assigner

GitHub_M

References

URL

Tags

https://github.com/asterisk/asterisk/security/adv…

x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	asterisk	asterisk	Affected: < 23.2.2 Affected: < 22.8.2 Affected: < 21.12.1 Affected: < 20.18.2 Affected: < 20.7-cert9

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-23741",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-06T17:22:49.844752Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-02-06T17:26:22.216Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "asterisk",
          "vendor": "asterisk",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 23.2.2"
            },
            {
              "status": "affected",
              "version": "\u003c 22.8.2"
            },
            {
              "status": "affected",
              "version": "\u003c 21.12.1"
            },
            {
              "status": "affected",
              "version": "\u003c 20.18.2"
            },
            {
              "status": "affected",
              "version": "\u003c 20.7-cert9"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, the asterisk/contrib/scripts/ast_coredumper runs as root, as noted by the NOTES tag on line 689 of the ast_coredumper file. The script will source the contents of /etc/asterisk/ast_debug_tools.conf, which resides in a folder that is writeable by the asterisk user:group. Due to the /etc/asterisk/ast_debug_tools.conf file following bash semantics and it being loaded; an attacker with write permissions may add or modify the file such that when the root ast_coredumper is run; it would source and thereby execute arbitrary bash code found in the /etc/asterisk/ast_debug_tools.conf. This issue has been patched in versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 0,
            "baseSeverity": "NONE",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-427",
              "description": "CWE-427: Uncontrolled Search Path Element",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-06T16:47:19.611Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/asterisk/asterisk/security/advisories/GHSA-rvch-3jmx-3jf3",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/asterisk/asterisk/security/advisories/GHSA-rvch-3jmx-3jf3"
        }
      ],
      "source": {
        "advisory": "GHSA-rvch-3jmx-3jf3",
        "discovery": "UNKNOWN"
      },
      "title": "ast_coredumper running as root sources ast_debug_tools.conf from /etc/asterisk; potentially leading to privilege escalation"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-23741",
    "datePublished": "2026-02-06T16:47:19.611Z",
    "dateReserved": "2026-01-15T15:45:01.958Z",
    "dateUpdated": "2026-02-06T17:26:22.216Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-23738 (GCVE-0-2026-23738)

Vulnerability from cvelistv5 – Published: 2026-02-06 16:41 – Updated: 2026-02-06 17:44

Title

The Asterisk embedded web server 's /httpstatus page echos user supplied values(cookie and query string) without sanitization

Summary

Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, user supplied/control values for Cookies and any GET variable query Parameter are directly interpolated into the HTML of the page using ast_str_append. The endpoint at GET /httpstatus is the potential vulnerable endpoint relating to asterisk/main /http.c. This issue has been patched in versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2.

Severity ?

3.5 (Low)


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

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M

References

URL

Tags

https://github.com/asterisk/asterisk/security/adv…

x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	asterisk	asterisk	Affected: < 23.2.2 Affected: < 22.8.2 Affected: < 21.12.1 Affected: < 20.18.2 Affected: < 20.7-cert9

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-23738",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-06T17:43:40.418371Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-02-06T17:44:20.480Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "asterisk",
          "vendor": "asterisk",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 23.2.2"
            },
            {
              "status": "affected",
              "version": "\u003c 22.8.2"
            },
            {
              "status": "affected",
              "version": "\u003c 21.12.1"
            },
            {
              "status": "affected",
              "version": "\u003c 20.18.2"
            },
            {
              "status": "affected",
              "version": "\u003c 20.7-cert9"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, user supplied/control values for Cookies and any GET variable query Parameter are directly interpolated into the HTML of the page using ast_str_append. The endpoint at GET /httpstatus is the potential vulnerable endpoint relating to asterisk/main /http.c. This issue has been patched in versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 3.5,
            "baseSeverity": "LOW",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-06T16:41:43.769Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/asterisk/asterisk/security/advisories/GHSA-v6hp-wh3r-cwxh",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/asterisk/asterisk/security/advisories/GHSA-v6hp-wh3r-cwxh"
        }
      ],
      "source": {
        "advisory": "GHSA-v6hp-wh3r-cwxh",
        "discovery": "UNKNOWN"
      },
      "title": "The Asterisk embedded web server \u0027s /httpstatus page echos user supplied values(cookie and query string) without sanitization"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-23738",
    "datePublished": "2026-02-06T16:41:43.769Z",
    "dateReserved": "2026-01-15T15:45:01.957Z",
    "dateUpdated": "2026-02-06T17:44:20.480Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-23739 (GCVE-0-2026-23739)

Vulnerability from cvelistv5 – Published: 2026-02-06 16:42 – Updated: 2026-02-06 17:37

Title

Asterisk xml.c uses unsafe XML_PARSE_NOENT leading to potential XXE Injection

Summary

Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, the ast_xml_open() function in xml.c parses XML documents using libxml with unsafe parsing options that enable entity expansion and XInclude processing. Specifically, it invokes xmlReadFile() with the XML_PARSE_NOENT flag and later processes XIncludes via xmlXIncludeProcess().If any untrusted or user-supplied XML file is passed to this function, it can allow an attacker to trigger XML External Entity (XXE) or XInclude-based local file disclosure, potentially exposing sensitive files from the host system. This can also be triggered in other cases in which the user is able to supply input in xml format that triggers the asterisk process to parse it. This issue has been patched in versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2.

Severity ?

2 (Low)


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

CWE

CWE-611 - Improper Restriction of XML External Entity Reference

Assigner

GitHub_M

References

URL

Tags

https://github.com/asterisk/asterisk/security/adv…

x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	asterisk	asterisk	Affected: < 23.2.2 Affected: < 22.8.2 Affected: < 21.12.1 Affected: < 20.18.2 Affected: < 20.7-cert9

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-23739",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-06T17:36:34.440710Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-02-06T17:37:22.223Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "asterisk",
          "vendor": "asterisk",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 23.2.2"
            },
            {
              "status": "affected",
              "version": "\u003c 22.8.2"
            },
            {
              "status": "affected",
              "version": "\u003c 21.12.1"
            },
            {
              "status": "affected",
              "version": "\u003c 20.18.2"
            },
            {
              "status": "affected",
              "version": "\u003c 20.7-cert9"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, the ast_xml_open() function in xml.c parses XML documents using libxml with unsafe parsing options that enable entity expansion and XInclude processing. Specifically, it invokes xmlReadFile() with the XML_PARSE_NOENT flag and later processes XIncludes via xmlXIncludeProcess().If any untrusted or user-supplied XML file is passed to this function, it can allow an attacker to trigger XML External Entity (XXE) or XInclude-based local file disclosure, potentially exposing sensitive files from the host system. This can also be triggered in other cases in which the user is able to supply input in xml format that triggers the asterisk process to parse it. This issue has been patched in versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 2,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-611",
              "description": "CWE-611: Improper Restriction of XML External Entity Reference",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-06T16:42:25.816Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/asterisk/asterisk/security/advisories/GHSA-85x7-54wr-vh42",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/asterisk/asterisk/security/advisories/GHSA-85x7-54wr-vh42"
        }
      ],
      "source": {
        "advisory": "GHSA-85x7-54wr-vh42",
        "discovery": "UNKNOWN"
      },
      "title": "Asterisk xml.c uses unsafe XML_PARSE_NOENT leading to potential XXE Injection"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-23739",
    "datePublished": "2026-02-06T16:42:25.816Z",
    "dateReserved": "2026-01-15T15:45:01.957Z",
    "dateUpdated": "2026-02-06T17:37:22.223Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-23740 (GCVE-0-2026-23740)

Vulnerability from cvelistv5 – Published: 2026-02-06 16:43 – Updated: 2026-02-06 19:11

Title

Asterisk vulnerable to potential privilege escalation

Summary

Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, when ast_coredumper writes its gdb init and output files to a directory that is world-writable (for example /tmp), an attacker with write permission(which is all users on a linux system) to that directory can cause root to execute arbitrary commands or overwrite arbitrary files by controlling the gdb init file and output paths. This issue has been patched in versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2.

Severity ?

0 (None)


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

CWE

CWE-427 - Uncontrolled Search Path Element

Assigner

GitHub_M

References

URL

Tags

https://github.com/asterisk/asterisk/security/adv…

x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	asterisk	asterisk	Affected: < 23.2.2 Affected: < 22.8.2 Affected: < 21.12.1 Affected: < 20.18.2 Affected: < 20.7-cert9

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-23740",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-06T19:11:52.277402Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-02-06T19:11:55.655Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "asterisk",
          "vendor": "asterisk",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 23.2.2"
            },
            {
              "status": "affected",
              "version": "\u003c 22.8.2"
            },
            {
              "status": "affected",
              "version": "\u003c 21.12.1"
            },
            {
              "status": "affected",
              "version": "\u003c 20.18.2"
            },
            {
              "status": "affected",
              "version": "\u003c 20.7-cert9"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, when ast_coredumper writes its gdb init and output files to a directory that is world-writable (for example /tmp), an attacker with write permission(which is all users on a linux system) to that directory can cause root to execute arbitrary commands or overwrite arbitrary files by controlling the gdb init file and output paths. This issue has been patched in versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 0,
            "baseSeverity": "NONE",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-427",
              "description": "CWE-427: Uncontrolled Search Path Element",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-06T16:43:52.278Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/asterisk/asterisk/security/advisories/GHSA-xpc6-x892-v83c",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/asterisk/asterisk/security/advisories/GHSA-xpc6-x892-v83c"
        }
      ],
      "source": {
        "advisory": "GHSA-xpc6-x892-v83c",
        "discovery": "UNKNOWN"
      },
      "title": "Asterisk vulnerable to potential privilege escalation"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-23740",
    "datePublished": "2026-02-06T16:43:41.330Z",
    "dateReserved": "2026-01-15T15:45:01.958Z",
    "dateUpdated": "2026-02-06T19:11:55.655Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Tags

Taxonomy of the tags.

All sightings related to this event Export sightings related to this event

Sightings

Author	Source	Type	Date

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.

Action not permitted

CERTFR-2026-AVI-0123

Solutions

CVE-2026-23741 (GCVE-0-2026-23741)

CVE-2026-23738 (GCVE-0-2026-23738)

CVE-2026-23739 (GCVE-0-2026-23739)

CVE-2026-23740 (GCVE-0-2026-23740)

Tags

Sightings

Nomenclature