CVE-2026-18536

{"id": "CVE-2026-18536", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-18536", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-03T19:55:08.843137Z"}}], "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}]}, "affected": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "affectedData": [{"repo": "https://github.com/robrwo/Data-Entropy", "vendor": "RRWO", "product": "Data::Entropy", "versions": [{"status": "affected", "version": "0", "lessThan": "0.010", "versionType": "custom"}], "packageName": "Data-Entropy", "programFiles": ["lib/Data/Entropy/RawSource/RandomOrg.pm", "lib/Data/Entropy/RawSource/RandomnumbersInfo.pm"], "collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "programRoutines": [{"name": "Data::Entropy::RawSource::RandomOrg::_checkbuf"}, {"name": "Data::Entropy::RawSource::RandomOrg::_ensure_buffer"}, {"name": "Data::Entropy::RawSource::RandomnumbersInfo::_ensure_buffer"}]}]}], "published": "2026-08-01T11:16:38.483", "references": [{"url": "https://github.com/robrwo/Data-Entropy/security/advisories/GHSA-845w-rcqw-jwvv", "tags": ["Vendor Advisory"], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}, {"url": "https://metacpan.org/release/RRWO/Data-Entropy-0.008/view/lib/Data/Entropy.pm#STATUS", "tags": ["Release Notes"], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}, {"url": "https://metacpan.org/release/RRWO/Data-Entropy-0.010/changes", "tags": ["Release Notes"], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}, {"url": "https://security.metacpan.org/docs/guides/random-data-for-security.html", "tags": ["Third Party Advisory"], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}, {"url": "http://www.openwall.com/lists/oss-security/2026/08/01/8", "tags": ["Mailing List", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "description": [{"lang": "en", "value": "CWE-319"}, {"lang": "en", "value": "CWE-353"}]}], "descriptions": [{"lang": "en", "value": "Data::Entropy versions before 0.010 for Perl read remote entropy sources over plain HTTP.\n\nThe Data::Entropy::RawSource::RandomOrg and Data::Entropy::RawSource::RandomnumbersInfo remote sources are accessed over plain HTTP.\n\nThe Data::Entropy::RawSource::RandomOrg integrity check trivially matches any non-empty byte string.\n\nAny on-path attacker, such as open WiFi, a compromised ISP, captive portal, or a hostile egress proxy substitutes the response and thereby chooses the bytes returned by rand_bits and rand_int for every application that selected one of these sources via with_entropy_source. The _checkbuf method response is equally attacker-controlled, so the retry/sleep behaviour is steerable too."}, {"lang": "es", "value": "Las versiones de Data::Entropy anteriores a la 0.010 para Perl leen fuentes de entrop\u00eda remotas a trav\u00e9s de HTTP sin cifrar.\n\nSe accede a las fuentes remotas Data::Entropy::RawSource::RandomOrg y Data::Entropy::RawSource::RandomnumbersInfo a trav\u00e9s de HTTP sin cifrar.\n\nLa verificaci\u00f3n de integridad de Data::Entropy::RawSource::RandomOrg coincide trivialmente con cualquier cadena de bytes no vac\u00eda.\n\nCualquier atacante en la ruta, como una red WiFi abierta, un ISP comprometido, un portal cautivo o un proxy de salida hostil, sustituye la respuesta y de este modo elige los bytes devueltos por rand_bits y rand_int para cada aplicaci\u00f3n que seleccion\u00f3 una de estas fuentes a trav\u00e9s de with_entropy_source. La respuesta del m\u00e9todo _checkbuf est\u00e1 igualmente controlada por el atacante, por lo que el comportamiento de reintento/espera tambi\u00e9n es dirigible."}], "lastModified": "2026-10-23T23:10:00.157", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:rrwo:data\\:\\:entropy:*:*:*:*:*:perl:*:*", "vulnerable": true, "matchCriteriaId": "8B313D17-8332-4B6B-9F48-3655144D7D19", "versionEndExcluding": "0.010"}], "operator": "OR"}]}], "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}