FKIE_CVE-2025-27591

Vulnerability from fkie_nvd - Published: 2025-03-11 19:15 - Updated: 2025-07-03 14:40
Severity ?
6.8 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Summary
A privilege escalation vulnerability existed in the Below service prior to v0.9.0 due to the creation of a world-writable directory at /var/log/below. This could have allowed local unprivileged users to escalate to root privileges through symlink attacks that manipulate files such as /etc/shadow.
References
cve-assign@fb.comhttps://github.com/facebookincubator/below/commit/da9382e6e3e332fd2c3195e22f34977f83f0f1f3Patch
cve-assign@fb.comhttps://www.facebook.com/security/advisories/cve-2025-27591Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2025/03/12/1Exploit, Mailing List
Impacted products
Vendor Product Version
facebook below *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:facebook:below:*:*:*:*:*:rust:*:*",
              "matchCriteriaId": "C449F323-7BC8-4478-B91A-BD2D62CF9365",
              "versionEndExcluding": "0.9.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A privilege escalation vulnerability existed in the Below service prior to v0.9.0 due to the creation of a world-writable directory at /var/log/below. This could have allowed local unprivileged users to escalate to root privileges through symlink attacks that manipulate files such as /etc/shadow."
    },
    {
      "lang": "es",
      "value": "En el servicio Below exist\u00eda una vulnerabilidad de escalada de privilegios antes de la versi\u00f3n v0.9.0 debido a la creaci\u00f3n de un directorio con permisos de escritura para todo el mundo en /var/log/below. Esto podr\u00eda haber permitido que usuarios locales sin privilegios escalaran a privilegios de superusuario mediante ataques de enlaces simb\u00f3licos que manipulan archivos como /etc/shadow."
    }
  ],
  "id": "CVE-2025-27591",
  "lastModified": "2025-07-03T14:40:01.117",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 6.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 4.2,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-03-11T19:15:43.390",
  "references": [
    {
      "source": "cve-assign@fb.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/facebookincubator/below/commit/da9382e6e3e332fd2c3195e22f34977f83f0f1f3"
    },
    {
      "source": "cve-assign@fb.com",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://www.facebook.com/security/advisories/cve-2025-27591"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Mailing List"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2025/03/12/1"
    }
  ],
  "sourceIdentifier": "cve-assign@fb.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-732"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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  • 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.
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  • 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.