CVE-2024-13939

String::Compare::ConstantTime for Perl through 0.321 is vulnerable to timing attacks that allow an attacker to guess the length of a secret string. As stated in the documentation: "If the lengths of the strings are different, because equals returns false right away the size of the secret string may be leaked (but not its contents)." This is similar to CVE-2020-36829

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://metacpan.org/release/FRACTAL/String-Compare-ConstantTime-0.321/view/lib/String/Compare/ConstantTime.pm#TIMING-SIDE-CHANNEL	Technical Description

Configurations

Configuration 1 (hide)

cpe:2.3:a:fractal:string\:\:compare\:\:constanttime:*:*:*:*:*:perl:*:*

History

No history.

Information

Published : 2025-03-28 03:15

Updated : 2025-04-11 18:10

NVD link : CVE-2024-13939

Mitre link : CVE-2024-13939

CVE.ORG link : CVE-2024-13939

JSON object : View

Products Affected

fractal

string\

CWE

CWE-208

Observable Timing Discrepancy

CWE-203

Observable Discrepancy

{"id": "CVE-2024-13939", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2025-03-28T03:15:15.720", "references": [{"url": "https://metacpan.org/release/FRACTAL/String-Compare-ConstantTime-0.321/view/lib/String/Compare/ConstantTime.pm#TIMING-SIDE-CHANNEL", "tags": ["Technical Description"], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "description": [{"lang": "en", "value": "CWE-208"}]}, {"type": "Primary", "source": "[email protected]", "description": [{"lang": "en", "value": "CWE-203"}]}], "descriptions": [{"lang": "en", "value": "String::Compare::ConstantTime for Perl through 0.321 is vulnerable to timing attacks that allow an attacker to guess the length of a secret string.\n\nAs stated in the documentation: \"If the lengths of the strings are different, because equals returns false right away the size of the secret string may be leaked (but not its contents).\"\n\nThis is similar to\u00a0CVE-2020-36829"}, {"lang": "es", "value": "String::Compare::ConstantTime para Perl hasta la versi\u00f3n 0.321 es vulnerable a ataques de temporizaci\u00f3n que permiten a un atacante adivinar la longitud de una cadena secreta. Como se indica en la documentaci\u00f3n: \"Si las longitudes de las cadenas son diferentes, dado que `equals` devuelve `false` inmediatamente, el tama\u00f1o de la cadena secreta podr\u00eda filtrarse (pero no su contenido). Esto es similar a CVE-2020-36829\"."}], "lastModified": "2025-04-11T18:10:56.160", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:fractal:string\\:\\:compare\\:\\:constanttime:*:*:*:*:*:perl:*:*", "vulnerable": true, "matchCriteriaId": "6FEDD552-E086-43B7-BFC0-87C3F736708D", "versionEndIncluding": "0.321"}], "operator": "OR"}]}], "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}