{"api_version":"1","generated_at":"2026-07-23T11:51:05+00:00","cve":"CVE-2019-18800","urls":{"html":"https://cve.report/CVE-2019-18800","api":"https://cve.report/api/cve/CVE-2019-18800.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2019-18800","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-18800"},"summary":{"title":"CVE-2019-18800","description":"Viber through 11.7.0.5 allows a remote attacker who can capture a victim's internet traffic to steal their Viber account, because not all Viber protocol traffic is encrypted. TCP data packet 9 on port 4244 from the victim's device contains cleartext information such as the device model and OS version, IMSI, and 20 bytes of udid in a binary format, which is located at offset 0x14 of this packet. Then, the attacker installs Viber on his device, initiates the registration process for any phone number, but doesn't enter a pin from SMS. Instead, he closes Viber. Next, the attacker rewrites his udid with the victim's udid, modifying the viber_udid file, which is located in the Viber preferences folder. (The udid is stored in a hexadecimal format.) Finally, the attacker starts Viber again and enters the pin from SMS.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2019-11-06 16:15:00","updated_at":"2020-08-24 17:37:00"},"problem_types":["CWE-311","CWE-319"],"metrics":[],"references":[{"url":"https://thesamarkand.tumblr.com/post/188785277609/viber-messenger-remote-account-reset-0day","name":"https://thesamarkand.tumblr.com/post/188785277609/viber-messenger-remote-account-reset-0day","refsource":"MISC","tags":["Exploit","Third Party Advisory"],"title":"Samarkand Studio — Viber Messenger Remote Account Reset (0day...","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-18800","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-18800","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2019","cve_id":"18800","vulnerable":"1","versionEndIncluding":"11.7.0.5","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"rakuten","cpe5":"viber","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"android","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2019-18800","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"Viber through 11.7.0.5 allows a remote attacker who can capture a victim's internet traffic to steal their Viber account, because not all Viber protocol traffic is encrypted. TCP data packet 9 on port 4244 from the victim's device contains cleartext information such as the device model and OS version, IMSI, and 20 bytes of udid in a binary format, which is located at offset 0x14 of this packet. Then, the attacker installs Viber on his device, initiates the registration process for any phone number, but doesn't enter a pin from SMS. Instead, he closes Viber. Next, the attacker rewrites his udid with the victim's udid, modifying the viber_udid file, which is located in the Viber preferences folder. (The udid is stored in a hexadecimal format.) Finally, the attacker starts Viber again and enters the pin from SMS."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"url":"https://thesamarkand.tumblr.com/post/188785277609/viber-messenger-remote-account-reset-0day","refsource":"MISC","name":"https://thesamarkand.tumblr.com/post/188785277609/viber-messenger-remote-account-reset-0day"}]}},"nvd":{"publishedDate":"2019-11-06 16:15:00","lastModifiedDate":"2020-08-24 17:37:00","problem_types":["CWE-311","CWE-319"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.9},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:P/I:N/A:N","accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":4.3},"severity":"MEDIUM","exploitabilityScore":8.6,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":true}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:rakuten:viber:*:*:*:*:*:android:*:*","versionEndIncluding":"11.7.0.5","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2019","CveId":"18800","Ordinal":"160366","Title":"CVE-2019-18800","CVE":"CVE-2019-18800","Year":"2019"},"notes":[{"CveYear":"2019","CveId":"18800","Ordinal":"1","NoteData":"Viber through 11.7.0.5 allows a remote attacker who can capture a victim's internet traffic to steal their Viber account, because not all Viber protocol traffic is encrypted. TCP data packet 9 on port 4244 from the victim's device contains cleartext information such as the device model and OS version, IMSI, and 20 bytes of udid in a binary format, which is located at offset 0x14 of this packet. Then, the attacker installs Viber on his device, initiates the registration process for any phone number, but doesn't enter a pin from SMS. Instead, he closes Viber. Next, the attacker rewrites his udid with the victim's udid, modifying the viber_udid file, which is located in the Viber preferences folder. (The udid is stored in a hexadecimal format.) Finally, the attacker starts Viber again and enters the pin from SMS.","Type":"Description","Title":null},{"CveYear":"2019","CveId":"18800","Ordinal":"2","NoteData":"2019-11-06","Type":"Other","Title":"Published"},{"CveYear":"2019","CveId":"18800","Ordinal":"3","NoteData":"2019-11-13","Type":"Other","Title":"Modified"}]}}}