{"id":"CVE-2026-14461","state":"PUBLISHED","title":"Out-of-bound read in mtr","description":"mtr is vulnerable to Out-of-bound read vulnerability in ipinfo_lookup() function. An attacker who can influence the TXT response used for AS lookups can trigger this bug by returning a DNS response that is larger than 512 bytes and uses a crafted compression pointer in the answer NAME field. ipinfo_lookup() function uses the length of the response as the end-of-message boundary for dn_expand() function. The result is a reliable crash.\n\n\nThis issue exists in the mtr through version 0.96 and it was fixed in commit 48e1794414d338ce47abc0f27c25ade8788af9c3.","publishedAt":"2026-07-10T10:38:28.947Z","updatedAt":"2026-07-10T13:14:54.068Z","severity":{"score":5.1,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","source":"CERT-PL"},"assigner":"CERT-PL","products":["BitWizard mtr"],"affected":[{"vendor":"BitWizard","product":"mtr","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"0.96","versionType":"custom"}],"repo":"https://github.com/traviscross/mtr/","programFiles":["ui/asn.c"],"programRoutines":[{"name":"ipinfo_lookup()"}]}],"references":["https://cert.pl/en/posts/2026/07/CVE-2026-14461","https://github.com/traviscross/mtr/commit/48e1794414d338ce47abc0f27c25ade8788af9c3"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:11:00.674Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/14xxx/CVE-2026-14461.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-14461","state":"PUBLISHED","datePublished":"2026-07-10T10:38:28.947Z","dateUpdated":"2026-07-10T13:14:54.068Z","assignerShortName":"CERT-PL","assignerOrgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateReserved":"2026-07-02T08:57:32.810Z"},"containers":{"cna":{"title":"Out-of-bound read in mtr","descriptions":[{"lang":"en","value":"mtr is vulnerable to Out-of-bound read vulnerability in ipinfo_lookup() function. An attacker who can influence the TXT response used for AS lookups can trigger this bug by returning a DNS response that is larger than 512 bytes and uses a crafted compression pointer in the answer NAME field. ipinfo_lookup() function uses the length of the response as the end-of-message boundary for dn_expand() function. The result is a reliable crash.\n\n\nThis issue exists in the mtr through version 0.96 and it was fixed in commit 48e1794414d338ce47abc0f27c25ade8788af9c3."}],"affected":[{"vendor":"BitWizard","product":"mtr","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"0.96","versionType":"custom"}],"repo":"https://github.com/traviscross/mtr/","programFiles":["ui/asn.c"],"programRoutines":[{"name":"ipinfo_lookup()"}]}],"references":[{"url":"https://cert.pl/en/posts/2026/07/CVE-2026-14461","tags":["third-party-advisory"]},{"url":"https://github.com/traviscross/mtr/commit/48e1794414d338ce47abc0f27c25ade8788af9c3","tags":["patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"ACTIVE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"MEDIUM","baseScore":5.1,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","description":"CWE-125 Out-of-bounds read","type":"CWE"}]}],"providerMetadata":{"shortName":"CERT-PL","orgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateUpdated":"2026-07-10T10:38:28.947Z"},"impacts":[{"capecId":"CAPEC-540","descriptions":[{"lang":"en","value":"CAPEC-540 Overread Buffers"}]}],"tags":["x_open-source"],"credits":[{"lang":"en","value":"Michał Majchrowicz (AFINE Team)","type":"finder"},{"lang":"en","value":"Marcin Wyczechowski (AFINE Team)","type":"finder"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.3"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-10T13:14:45.489929Z","id":"CVE-2026-14461","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":"2026-07-10T13:14:54.068Z"}}]}}}