CVE-2021-29477 (GCVE-0-2021-29477)

Vulnerability from cvelistv5 – Published: 2021-05-04 15:15 – Updated: 2024-08-03 22:11
VLAI
Title
Vulnerability in the STRALGO LCS command
Summary
Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache, and message broker. An integer overflow bug in Redis version 6.0 or newer could be exploited using the `STRALGO LCS` command to corrupt the heap and potentially result with remote code execution. The problem is fixed in version 6.2.3 and 6.0.13. An additional workaround to mitigate the problem without patching the redis-server executable is to use ACL configuration to prevent clients from using the `STRALGO LCS` command.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-190 - Integer Overflow or Wraparound
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 8075 records in the last 180 days details
References
URL Tags
https://github.com/redis/redis/security/advisorie… x_refsource_CONFIRM
https://redis.io/ x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://security.gentoo.org/glsa/202107-20 vendor-advisoryx_refsource_GENTOO
Impacted products
Vendor Product Version CPE status
redis redis Affected: >= 6.2.0, < 6.2.3
Affected: >= 6.0.0, < 6.0.13
guessed Create a notification for this product.
Show details on NVD website
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                    "criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
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        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache, and message broker. An integer overflow bug in Redis version 6.0 or newer could be exploited using the `STRALGO LCS` command to corrupt the heap and potentially result with remote code execution. The problem is fixed in version 6.2.3 and 6.0.13. An additional workaround to mitigate the problem without patching the redis-server executable is to use ACL configuration to prevent clients from using the `STRALGO LCS` command."
          },
          {
            "lang": "es",
            "value": "Redis es una estructura de datos en memoria de c\u00f3digo abierto (con licencia BSD) almacenado, utilizado como base de datos, cach\u00e9 y agente de mensajes.\u0026#xa0;Un bug de desbordamiento de enteros en Redis versi\u00f3n 6.0 o m\u00e1s reciente podr\u00eda ser explotada usando el comando \"STRALGO LCS\" para corromper la pila y potencialmente resultar en una ejecuci\u00f3n de c\u00f3digo remota.\u0026#xa0;El problema se corrigi\u00f3 en las versiones 6.2.3 y 6.0.13.\u0026#xa0;Una soluci\u00f3n alternativa para mitigar el problema sin parchear el ejecutable redis-server es usar la configuraci\u00f3n de ACL para impedir que los clientes usen el comando \"STRALGO LCS\""
          }
        ],
        "id": "CVE-2021-29477",
        "lastModified": "2024-11-21T06:01:13.203",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "NETWORK",
                "authentication": "SINGLE",
                "availabilityImpact": "PARTIAL",
                "baseScore": 6.5,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P",
                "version": "2.0"
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              "exploitabilityScore": 8.0,
              "impactScore": 6.4,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
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          ],
          "cvssMetricV31": [
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              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
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              "impactScore": 5.9,
              "source": "security-advisories@github.com",
              "type": "Secondary"
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            {
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                "attackVector": "NETWORK",
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                "baseScore": 8.8,
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                "scope": "UNCHANGED",
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                "version": "3.1"
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              "exploitabilityScore": 2.8,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
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        },
        "published": "2021-05-04T16:15:07.910",
        "references": [
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            "tags": [
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            "url": "https://github.com/redis/redis/security/advisories/GHSA-vqxj-26vj-996g"
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        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
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              {
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                "value": "CWE-190"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Secondary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-190"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
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        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-02-24T17:22:08+00:00",
      "cve": "CVE-2021-29477",
      "id": "CVE-2021-29477",
      "initial_release_date": "2021-05-04T00:00:00+00:00",
      "product_status:fixed": "18",
      "product_status:known_affected": "1",
      "product_status:known_not_affected": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "redis: Integer overflow via STRALGO LCS command",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-29477.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2025-10-07T02:33:27Z",
      "cve": "CVE-2021-29477",
      "id": "CVE-2021-29477",
      "initial_release_date": "2023-02-15T03:43:31Z",
      "product_status:recommended": "28",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-29477",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-29477.json",
      "version": "10"
    }
  }
}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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Vulnerability timeline

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