{"api_version":"1","generated_at":"2026-04-22T22:48:58+00:00","cve":"CVE-2019-15691","urls":{"html":"https://cve.report/CVE-2019-15691","api":"https://cve.report/api/cve/CVE-2019-15691.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2019-15691","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-15691"},"summary":{"title":"CVE-2019-15691","description":"TigerVNC version prior to 1.10.1 is vulnerable to stack use-after-return, which occurs due to incorrect usage of stack memory in ZRLEDecoder. If decoding routine would throw an exception, ZRLEDecoder may try to access stack variable, which has been already freed during the process of stack unwinding. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.","state":"PUBLIC","assigner":"vulnerability@kaspersky.com","published_at":"2019-12-26 15:15:00","updated_at":"2022-11-09 21:25:00"},"problem_types":["CWE-672"],"metrics":[],"references":[{"url":"https://github.com/CendioOssman/tigervnc/commit/d61a767d6842b530ffb532ddd5a3d233119aad40","name":"https://github.com/CendioOssman/tigervnc/commit/d61a767d6842b530ffb532ddd5a3d233119aad40","refsource":"MISC","tags":["Patch","Third Party Advisory"],"title":"Make ZlibInStream more robust against failures · CendioOssman/tigervnc@d61a767 · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00039.html","name":"openSUSE-SU-2020:0087","refsource":"SUSE","tags":[],"title":"[security-announce] openSUSE-SU-2020:0087-1: important: Security update","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/TigerVNC/tigervnc/releases/tag/v1.10.1","name":"https://github.com/TigerVNC/tigervnc/releases/tag/v1.10.1","refsource":"MISC","tags":["Release Notes","Third Party Advisory"],"title":"Release TigerVNC 1.10.1 · TigerVNC/tigervnc · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.openwall.com/lists/oss-security/2019/12/20/2","name":"[oss-security] 20191220 VNC vulnerabilities. TigerVNC security update","refsource":"MLIST","tags":["Exploit","Mailing List","Third Party Advisory"],"title":"oss-security - VNC vulnerabilities. TigerVNC security update","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-15691","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-15691","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2019","cve_id":"15691","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"opensuse","cpe5":"leap","cpe6":"15.1","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2019","cve_id":"15691","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"tigervnc","cpe5":"tigervnc","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2019","cve_id":"15691","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"tigervnc","cpe5":"tigervnc","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2019-15691","qid":"296075","title":"Oracle Solaris 11.4 Support Repository Update (SRU) 21.69.0 Missing (CPUAPR2020)"},{"cve":"CVE-2019-15691","qid":"377514","title":"Alibaba Cloud Linux Security Update for tigervnc (ALINUX2-SA-2020:0126)"}]},"source_records":{"cve_program":{"data_type":"CVE","data_format":"MITRE","data_version":"4.0","CVE_data_meta":{"ID":"CVE-2019-15691","ASSIGNER":"vulnerability@kaspersky.com","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"vendor_name":"Kaspersky","product":{"product_data":[{"product_name":"TigerVNC","version":{"version_data":[{"version_value":"1.10.0"}]}}]}}]}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-825: Expired Pointer Dereference"}]}]},"references":{"reference_data":[{"refsource":"MISC","name":"https://github.com/CendioOssman/tigervnc/commit/d61a767d6842b530ffb532ddd5a3d233119aad40","url":"https://github.com/CendioOssman/tigervnc/commit/d61a767d6842b530ffb532ddd5a3d233119aad40"},{"refsource":"MISC","name":"https://github.com/TigerVNC/tigervnc/releases/tag/v1.10.1","url":"https://github.com/TigerVNC/tigervnc/releases/tag/v1.10.1"},{"refsource":"MLIST","name":"[oss-security] 20191220 VNC vulnerabilities. TigerVNC security update","url":"https://www.openwall.com/lists/oss-security/2019/12/20/2"},{"refsource":"SUSE","name":"openSUSE-SU-2020:0087","url":"http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00039.html"}]},"description":{"description_data":[{"lang":"eng","value":"TigerVNC version prior to 1.10.1 is vulnerable to stack use-after-return, which occurs due to incorrect usage of stack memory in ZRLEDecoder. If decoding routine would throw an exception, ZRLEDecoder may try to access stack variable, which has been already freed during the process of stack unwinding. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity."}]}},"nvd":{"publishedDate":"2019-12-26 15:15:00","lastModifiedDate":"2022-11-09 21:25:00","problem_types":["CWE-672"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":7.2,"baseSeverity":"HIGH"},"exploitabilityScore":1.2,"impactScore":5.9},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:S/C:P/I:P/A:P","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"SINGLE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL","baseScore":6.5},"severity":"MEDIUM","exploitabilityScore":8,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:tigervnc:tigervnc:*:*:*:*:*:*:*:*","versionEndExcluding":"1.10.1","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2019","CveId":"15691","Ordinal":"155218","Title":"CVE-2019-15691","CVE":"CVE-2019-15691","Year":"2019"},"notes":[{"CveYear":"2019","CveId":"15691","Ordinal":"1","NoteData":"TigerVNC version prior to 1.10.1 is vulnerable to stack use-after-return, which occurs due to incorrect usage of stack memory in ZRLEDecoder. If decoding routine would throw an exception, ZRLEDecoder may try to access stack variable, which has been already freed during the process of stack unwinding. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.","Type":"Description","Title":null},{"CveYear":"2019","CveId":"15691","Ordinal":"2","NoteData":"2019-12-26","Type":"Other","Title":"Published"},{"CveYear":"2019","CveId":"15691","Ordinal":"3","NoteData":"2020-01-21","Type":"Other","Title":"Modified"}]}}}