{"id":"CVE-2025-11683","state":"PUBLISHED","title":"YAML::Syck versions before 1.36 for Perl has missing Null-Terminators which causes Out-of-Bounds Read and potential Information Disclosure","description":"YAML::Syck versions before 1.36 for Perl has missing null-terminators which causes out-of-bounds read and potential information disclosure\n\nMissing null terminators in token.c leads to but-of-bounds read which allows adjacent variable to be read\n\nThe issue is seen with complex YAML files with a hash of all keys and empty values.  There is no indication that the issue leads to accessing memory outside that allocated to the module.","publishedAt":"2025-10-16T00:14:41.769Z","updatedAt":"2025-10-16T13:42:17.584Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","source":"CISA-ADP"},"assigner":"CPANSec","products":["TODDR YAML::Syck"],"affected":[{"vendor":"TODDR","product":"YAML::Syck","packageName":"YAML-Syck","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.36","versionType":"custom"}],"collectionURL":"https://cpan.org/modules","programFiles":["token.c"],"repo":"https://github.com/cpan-authors/YAML-Syck"}],"references":["https://github.com/cpan-authors/YAML-Syck/pull/65","https://metacpan.org/dist/YAML-Syck/changes"],"weaknesses":["CWE-119"],"ingestedAt":"2026-10-29T20:08:31.050Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/11xxx/CVE-2025-11683.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-11683","state":"PUBLISHED","datePublished":"2025-10-16T00:14:41.769Z","dateUpdated":"2025-10-16T13:42:17.584Z","assignerShortName":"CPANSec","assignerOrgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","dateReserved":"2025-10-13T12:35:07.822Z"},"containers":{"cna":{"title":"YAML::Syck versions before 1.36 for Perl has missing Null-Terminators which causes Out-of-Bounds Read and potential Information Disclosure","descriptions":[{"lang":"en","value":"YAML::Syck versions before 1.36 for Perl has missing null-terminators which causes out-of-bounds read and potential information disclosure\n\nMissing null terminators in token.c leads to but-of-bounds read which allows adjacent variable to be read\n\nThe issue is seen with complex YAML files with a hash of all keys and empty values.  There is no indication that the issue leads to accessing memory outside that allocated to the module."}],"affected":[{"vendor":"TODDR","product":"YAML::Syck","packageName":"YAML-Syck","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.36","versionType":"custom"}],"collectionURL":"https://cpan.org/modules","programFiles":["token.c"],"repo":"https://github.com/cpan-authors/YAML-Syck"}],"references":[{"url":"https://github.com/cpan-authors/YAML-Syck/pull/65","tags":["patch"]},{"url":"https://metacpan.org/dist/YAML-Syck/changes","tags":["release-notes"]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-119","description":"CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"CPANSec","orgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","dateUpdated":"2025-10-16T00:14:41.769Z"},"impacts":[{"capecId":"CAPEC-540","descriptions":[{"lang":"en","value":"CAPEC-540 Overread Buffers"}]}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Upgrade to version 1.36 or higher"}],"value":"Upgrade to version 1.36 or higher"}],"source":{"discovery":"UNKNOWN"},"workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Apply the patch"}],"value":"Apply the patch"}],"x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":6.5,"attackVector":"ADJACENT_NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:A/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"}},{"other":{"type":"ssvc","content":{"timestamp":"2025-10-16T13:41:01.868545Z","id":"CVE-2025-11683","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-10-16T13:42:17.584Z"}}]}}}