{"id":"CVE-2019-15680","aliases":["DEBIAN-CVE-2019-15680","DLA-2045-1","EUVD-2019-6619","GHSA-7734-vjrv-hjxq","SUSE-SU-2019:14235-1","UBUNTU-CVE-2019-15680","USN-4407-1"],"status":"published","title":"TightVNC code version 1.3.10 contains null pointer dereference in HandleZlibBPP function, which...","description":"TightVNC code version 1.3.10 contains null pointer dereference in HandleZlibBPP function, which results Denial of System (DoS). This attack appear to be exploitable via network 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List","Third Party Advisory","advisory","report"]},{"url":"https://lists.debian.org/debian-lts-announce/2019/12/msg00028.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"https://usn.ubuntu.com/4407-1/","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred","web"]},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-478893.pdf","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"https://us-cert.cisa.gov/ics/advisories/icsa-20-343-08","tags":["x_refsource_MISC","x_transferred","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-15680"},{"url":"https://github.com/advisories/GHSA-7734-vjrv-hjxq"},{"url":"https://security-tracker.debian.org/tracker/CVE-2019-15680","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2019/suse-su-201914235-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1155442","tags":["report"]},{"url":"https://bugzilla.suse.com/1155452","tags":["report"]},{"url":"https://bugzilla.suse.com/1155472","tags":["report"]},{"url":"https://bugzilla.suse.com/1155476","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2019-15678","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-15679","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-15680","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-8287","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2019-15680","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-4407-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-15680","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2017-18922","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2019-15681","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2019-15690","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2019-20788","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2019-15680","description":"TightVNC code version 1.3.10 contains null pointer dereference in HandleZlibBPP function, which results Denial of System (DoS). This attack appear to be exploitable via network connectivity.","status":"published","published":"2019-10-29T16:45:52Z","modified":"2024-08-05T00:56:22.088Z","cwes":["CWE-476"],"updated_at":"2026-11-02T14:20:21.397307Z"}],"euvd":[{"id":"EUVD-2019-6619","description":"TightVNC code version 1.3.10 contains null pointer dereference in HandleZlibBPP function, which results Denial of System (DoS). This attack appear to be exploitable via network connectivity.","status":"published","published":"2019-10-29T16:45:52Z","modified":"2024-08-05T00:56:22Z","updated_at":"2026-11-03T02:40:35.132035Z"}],"ghsa":[{"id":"GHSA-7734-vjrv-hjxq","title":"TightVNC code version 1.3.10 contains null pointer dereference in HandleZlibBPP function, which...","description":"TightVNC code version 1.3.10 contains null pointer dereference in HandleZlibBPP function, which results Denial of System (DoS). This attack appear to be exploitable via network connectivity.","status":"published","published":"2022-05-24T17:00:02Z","modified":"2023-01-28T05:07:45Z","cwes":["CWE-476"],"updated_at":"2026-11-02T14:44:34.06652Z"}],"nvd":[{"id":"CVE-2019-15680","description":"TightVNC code version 1.3.10 contains null pointer dereference in HandleZlibBPP function, which results Denial of System (DoS). This attack appear to be exploitable via network connectivity.","status":"published","published":"2019-10-29T19:15:18.033Z","modified":"2026-06-17T02:20:51.693Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:05:32.982925Z"}],"osv":[{"id":"CVE-2019-15680","description":"TightVNC code version 1.3.10 contains null pointer dereference in HandleZlibBPP function, which results Denial of System (DoS). This attack appear to be exploitable via network connectivity.","status":"published","published":"2019-10-29T19:15:18.033Z","modified":"2026-03-15T14:33:45.347386Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:11.361782Z"},{"id":"DEBIAN-CVE-2019-15680","description":"TightVNC code version 1.3.10 contains null pointer dereference in HandleZlibBPP function, which results Denial of System (DoS). This attack appear to be exploitable via network connectivity.","status":"published","published":"2019-10-29T19:15:18.033Z","modified":"2026-09-21T07:01:11.679030135Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:31.867036Z"},{"id":"UBUNTU-CVE-2019-15680","description":"TightVNC code version 1.3.10 contains null pointer dereference in HandleZlibBPP function, which results Denial of System (DoS). This attack appear to be exploitable via network connectivity.","status":"published","published":"2019-10-29T19:15:00Z","modified":"2026-10-17T12:55:39.334483046Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:19.6877Z"},{"id":"DLA-2045-1","title":"tightvnc - security update","status":"published","published":"2019-12-21T00:00:00Z","modified":"2026-03-09T01:19:55.474259Z","updated_at":"2026-11-02T15:46:10.227108Z"},{"id":"SUSE-SU-2019:14235-1","title":"Security update for tightvnc","description":"This update for tightvnc fixes the following issues:\n\n- CVE-2019-15679: Fixed a heap buffer overflow in InitialiseRFBConnection \n  which might lead to code execution (bsc#1155476). \n- CVE-2019-8287: Fixed a global buffer overflow in HandleCoRREBBPmay which \n  might lead to code execution (bsc#1155472).\n- CVE-2019-15680: Fixed a null pointer dereference in HandleZlibBPP which \n  could have led to denial of service (bsc#1155452).\n- CVE-2019-15678: Fixed a heap buffer overflow in rfbServerCutText handler \n  (bsc#1155442).\n","status":"published","published":"2019-11-29T13:46:58Z","modified":"2026-02-04T02:44:00.90624Z","updated_at":"2026-11-02T15:53:46.44301Z"},{"id":"USN-4407-1","title":"libvncserver vulnerabilities","description":"It was discovered that LibVNCServer incorrectly handled decompressing data. An\nattacker could possibly use this issue to cause LibVNCServer to crash,\nresulting in a denial of service. (CVE-2019-15680)\n\nIt was discovered that an information disclosure vulnerability existed in\nLibVNCServer when sending a ServerCutText message. An attacker could possibly\nuse this issue to expose sensitive information. This issue only affected\nUbuntu 19.10, Ubuntu 18.04 LTS, and Ubuntu 16.04 LTS. (CVE-2019-15681)\n\nIt was discovered that LibVNCServer incorrectly handled cursor shape updates.\nIf a user were tricked in to connecting to a malicious server, an attacker\ncould possibly use this issue to cause LibVNCServer to crash, resulting in a\ndenial of service, or possibly execute arbitrary code. This issue only\naffected Ubuntu 19.10, Ubuntu 18.04 LTS, and Ubuntu 16.04 LTS.\n(CVE-2019-15690, CVE-2019-20788)\n\nIt was discovered that LibVNCServer incorrectly handled decoding WebSocket\nframes. An attacker could possibly use this issue to cause LibVNCServer to\ncrash, resulting in a denial of service, or possibly execute arbitrary code.\nThis issue only affected Ubuntu 19.10, Ubuntu 18.04 LTS, and Ubuntu 16.04 LTS.\n(CVE-2017-18922)\n","status":"published","published":"2020-07-01T23:44:41Z","modified":"2026-04-27T15:39:05.015501Z","updated_at":"2026-11-02T16:58:14.547547Z"}]}}