{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-40931", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "state": "PUBLISHED", "assignerShortName": "CPANSec", "dateReserved": "2025-04-16T09:05:34.363Z", "datePublished": "2026-03-05T01:41:09.588Z", "dateUpdated": "2026-04-12T17:19:38.170Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "packageName": "Apache-Session", "product": "Apache::Session::Generate::MD5", "programFiles": ["lib/Session/Generate/MD5.pm"], "repo": "https://github.com/chorny/Apache-Session", "vendor": "CHORNY", "versions": [{"lessThanOrEqual": "1.94", "status": "affected", "version": "0", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "Apache::Session::Generate::MD5 versions through 1.94 for Perl create insecure session id.\n\nApache::Session::Generate::MD5 generates session ids insecurely. The default session id generator returns a MD5 hash seeded with the built-in rand() function, the epoch time, and the PID. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage. Predicable session ids could allow an attacker to gain access to systems.\n\nNote that the libapache-session-perl package in some Debian-based Linux distributions may be patched to use Crypt::URandom."}], "impacts": [{"capecId": "CAPEC-115", "descriptions": [{"lang": "en", "value": "CAPEC-115 Authentication Bypass"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-340", "description": "CWE-340 Generation of Predictable Numbers or Identifiers", "lang": "en", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-338", "description": "CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-04-12T17:19:38.170Z"}, "references": [{"url": "https://metacpan.org/dist/Apache-Session/source/lib/Apache/Session/Generate/MD5.pm#L27"}, {"tags": ["technical-description"], "url": "https://security.metacpan.org/docs/guides/random-data-for-security.html"}, {"tags": ["issue-tracking"], "url": "https://github.com/chorny/Apache-Session/issues/4"}, {"tags": ["issue-tracking"], "url": "https://rt.cpan.org/Ticket/Display.html?id=173631"}, {"tags": ["mailing-list"], "url": "https://www.openwall.com/lists/oss-security/2019/06/15/1"}, {"tags": ["issue-tracking"], "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=930659"}, {"tags": ["patch"], "url": "https://salsa.debian.org/perl-team/modules/packages/libapache-session-perl/-/commit/bdabd71c2f91b18526e31a9dc52b4c17b3d246b7#898a4b8b00022df1b8689910b67707f3e738d180"}, {"tags": ["issue-tracking"], "url": "https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/work_items/1633"}, {"url": "https://metacpan.org/pod/Apache::Session::Generate::Random"}], "solutions": [{"lang": "en", "value": "Consider alternate solutions like https://metacpan.org/pod/Apache::Session::Generate::Random"}], "source": {"discovery": "UNKNOWN"}, "timeline": [{"lang": "en", "time": "2017-10-06T00:00:00.000Z", "value": "Issue created in the GitHub repository for Apache-Session identifying poor entropy."}, {"lang": "en", "time": "2019-06-15T00:00:00.000Z", "value": "Report posted to the Open Source Security mailing list."}, {"lang": "en", "time": "2019-06-17T00:00:00.000Z", "value": "Debian bug 930659 for libapache-session-perl poor source of entropy for session id generation."}, {"lang": "en", "time": "2019-06-20T00:00:00.000Z", "value": "Patch to use Crypt::URandom created by the Debian Perl Group."}, {"lang": "en", "time": "2025-09-04T00:00:00.000Z", "value": "Issue reported to CPANSec."}, {"lang": "en", "time": "2026-03-05T00:00:00.000Z", "value": "CVE disclosed by CPANSec."}], "title": "Apache::Session::Generate::MD5 versions through 1.94 for Perl create insecure session id", "workarounds": [{"lang": "en", "value": "Apply the patch from the Debian Perl Group that uses Crypt::URandom."}], "x_generator": {"engine": "cpansec-cna-tool 0.1"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/03/05/3"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-03-05T11:12:52.118Z"}}, {"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-03-05T16:38:07.301789Z", "id": "CVE-2025-40931", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-11T14:59:01.628Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/03/05/3"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-03-05T11:12:52.118Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2025-40931", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-03-05T16:38:07.301789Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-05T16:38:30.872Z"}}], "cna": {"title": "Apache::Session::Generate::MD5 versions through 1.94 for Perl create insecure session id", "source": {"discovery": "UNKNOWN"}, "impacts": [{"capecId": "CAPEC-115", "descriptions": [{"lang": "en", "value": "CAPEC-115 Authentication Bypass"}]}], "affected": [{"repo": "https://github.com/chorny/Apache-Session", "vendor": "CHORNY", "product": "Apache::Session::Generate::MD5", "versions": [{"status": "affected", "version": "0", "versionType": "custom", "lessThanOrEqual": "1.94"}], "packageName": "Apache-Session", "programFiles": ["lib/Session/Generate/MD5.pm"], "collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected"}], "timeline": [{"lang": "en", "time": "2017-10-06T00:00:00.000Z", "value": "Issue created in the GitHub repository for Apache-Session identifying poor entropy."}, {"lang": "en", "time": "2019-06-15T00:00:00.000Z", "value": "Report posted to the Open Source Security mailing list."}, {"lang": "en", "time": "2019-06-17T00:00:00.000Z", "value": "Debian bug 930659 for libapache-session-perl poor source of entropy for session id generation."}, {"lang": "en", "time": "2019-06-20T00:00:00.000Z", "value": "Patch to use Crypt::URandom created by the Debian Perl Group."}, {"lang": "en", "time": "2025-09-04T00:00:00.000Z", "value": "Issue reported to CPANSec."}, {"lang": "en", "time": "2026-03-05T00:00:00.000Z", "value": "CVE disclosed by CPANSec."}], "solutions": [{"lang": "en", "value": "Consider alternate solutions like https://metacpan.org/pod/Apache::Session::Generate::Random"}], "references": [{"url": "https://metacpan.org/dist/Apache-Session/source/lib/Apache/Session/Generate/MD5.pm#L27"}, {"url": "https://security.metacpan.org/docs/guides/random-data-for-security.html", "tags": ["technical-description"]}, {"url": "https://github.com/chorny/Apache-Session/issues/4", "tags": ["issue-tracking"]}, {"url": "https://rt.cpan.org/Ticket/Display.html?id=173631", "tags": ["issue-tracking"]}, {"url": "https://www.openwall.com/lists/oss-security/2019/06/15/1", "tags": ["mailing-list"]}, {"url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=930659", "tags": ["issue-tracking"]}, {"url": "https://salsa.debian.org/perl-team/modules/packages/libapache-session-perl/-/commit/bdabd71c2f91b18526e31a9dc52b4c17b3d246b7#898a4b8b00022df1b8689910b67707f3e738d180", "tags": ["patch"]}, {"url": "https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/work_items/1633", "tags": ["issue-tracking"]}, {"url": "https://metacpan.org/pod/Apache::Session::Generate::Random"}], "workarounds": [{"lang": "en", "value": "Apply the patch from the Debian Perl Group that uses Crypt::URandom."}], "x_generator": {"engine": "cpansec-cna-tool 0.1"}, "descriptions": [{"lang": "en", "value": "Apache::Session::Generate::MD5 versions through 1.94 for Perl create insecure session id.\n\nApache::Session::Generate::MD5 generates session ids insecurely. The default session id generator returns a MD5 hash seeded with the built-in rand() function, the epoch time, and the PID. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage. Predicable session ids could allow an attacker to gain access to systems.\n\nNote that the libapache-session-perl package in some Debian-based Linux distributions may be patched to use Crypt::URandom."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-340", "description": "CWE-340 Generation of Predictable Numbers or Identifiers"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-338", "description": "CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator"}]}], "providerMetadata": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-04-12T17:19:38.170Z"}}}, "cveMetadata": {"cveId": "CVE-2025-40931", "state": "PUBLISHED", "dateUpdated": "2026-04-12T17:19:38.170Z", "dateReserved": "2025-04-16T09:05:34.363Z", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "datePublished": "2026-03-05T01:41:09.588Z", "assignerShortName": "CPANSec"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:chorny:apache\\:\\:session\\:\\:generate\\:\\:md5:*:*:*:*:*:perl:*:*", "matchCriteriaId": "D04C726E-3C53-423A-8F6D-C2DC97BD228F", "versionEndIncluding": "1.94", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Apache::Session::Generate::MD5 versions through 1.94 for Perl create insecure session id.\n\nApache::Session::Generate::MD5 generates session ids insecurely. The default session id generator returns a MD5 hash seeded with the built-in rand() function, the epoch time, and the PID. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage. Predicable session ids could allow an attacker to gain access to systems.\n\nNote that the libapache-session-perl package in some Debian-based Linux distributions may be patched to use Crypt::URandom."}, {"lang": "es", "value": "Las versiones de Apache::Session::Generate::MD5 hasta la 1.94 para Perl crean un ID de sesi\u00f3n inseguro.\n\nApache::Session::Generate::MD5 genera IDs de sesi\u00f3n de forma insegura. El generador de ID de sesi\u00f3n predeterminado devuelve un hash MD5 inicializado con la funci\u00f3n rand() incorporada, el tiempo de \u00e9poca y el PID. El PID provendr\u00e1 de un peque\u00f1o conjunto de n\u00fameros, y el tiempo de \u00e9poca puede ser adivinado, si no se filtra del encabezado HTTP Date. La funci\u00f3n rand incorporada no es adecuada para uso criptogr\u00e1fico. Los IDs de sesi\u00f3n predecibles podr\u00edan permitir a un atacante obtener acceso a los sistemas."}], "id": "CVE-2025-40931", "lastModified": "2026-04-12T18:16:38.647", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-03-05T02:16:39.960", "references": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=930659"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "tags": ["Issue Tracking"], "url": "https://github.com/chorny/Apache-Session/issues/4"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/work_items/1633"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "tags": ["Product"], "url": "https://metacpan.org/dist/Apache-Session/source/lib/Apache/Session/Generate/MD5.pm#L27"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://metacpan.org/pod/Apache::Session::Generate::Random"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "tags": ["Third Party Advisory"], "url": "https://rt.cpan.org/Ticket/Display.html?id=173631"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://salsa.debian.org/perl-team/modules/packages/libapache-session-perl/-/commit/bdabd71c2f91b18526e31a9dc52b4c17b3d246b7#898a4b8b00022df1b8689910b67707f3e738d180"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://security.metacpan.org/docs/guides/random-data-for-security.html"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://www.openwall.com/lists/oss-security/2019/06/15/1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2026/03/05/3"}], "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-338"}, {"lang": "en", "value": "CWE-340"}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,1.94]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "Apache::Session::Generate::MD5", "source": "cna", "vendor": "CHORNY"}, "product": "apache::session::generate::md5", "vendor": "chorny"}], "created": "2026-03-06T15:17:59.741317+00:00", "updated": "2026-03-06T15:17:59.741393+00:00", "vendors": ["chorny", "chorny$PRODUCT$apache::session::generate::md5"]}