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size.","status":"published","published":"2020-06-17T16:15:12.337Z","modified":"2026-11-03T06:32:23.932852738Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T07:17:57.723967Z"},{"id":"CVE-2020-14405","description":"An issue was discovered in LibVNCServer before 0.9.13. libvncclient/rfbproto.c does not limit TextChat size.","status":"published","published":"2020-06-17T16:15:12.337Z","modified":"2026-10-20T10:51:50.163316943Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:14.418339Z"},{"id":"DEBIAN-CVE-2020-14405","description":"An issue was discovered in LibVNCServer before 0.9.13. libvncclient/rfbproto.c does not limit TextChat size.","status":"published","published":"2020-06-17T16:15:12.337Z","modified":"2026-10-26T12:01:36.203187393Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:33.384087Z"},{"id":"RHSA-2021:1811","title":"Red Hat Security Advisory: libvncserver security update","status":"published","published":"2024-09-16T05:02:38Z","modified":"2026-06-27T10:13:34Z","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":"2026-11-02T15:53:08.071325Z"},{"id":"RLSA-2021:1811","title":"Moderate: libvncserver security update","description":"LibVNCServer is a C library that enables you to implement VNC server functionality into own programs.\n\nSecurity Fix(es):\n\n* libvncserver: uninitialized memory contents are vulnerable to Information Leak (CVE-2018-21247)\n\n* libvncserver: buffer overflow in ConnectClientToUnixSock() (CVE-2019-20839)\n\n* libvncserver: libvncserver/rfbregion.c has a NULL pointer dereference (CVE-2020-14397)\n\n* libvncserver: libvncclient/rfbproto.c does not limit TextChat size (CVE-2020-14405)\n\n* libvncserver: libvncserver/rfbserver.c has a divide by zero which could result in DoS (CVE-2020-25708)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the Rocky Linux 8.4 Release Notes linked from the References section.","status":"published","published":"2021-05-18T06:09:01Z","modified":"2026-02-04T10:30:04.644359Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:53:23.969672Z"},{"id":"UBUNTU-CVE-2020-14405","description":"An issue was discovered in LibVNCServer before 0.9.13. libvncclient/rfbproto.c does not limit TextChat size.","status":"published","published":"2020-06-17T16:15:00Z","modified":"2026-10-17T12:55:44.915173926Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:54:22.804634Z"},{"id":"ALSA-2021:1811","title":"Moderate: libvncserver security update","description":"LibVNCServer is a C library that enables you to implement VNC server functionality into own programs.\n\nSecurity Fix(es):\n\n* libvncserver: uninitialized memory contents are vulnerable to Information Leak (CVE-2018-21247)\n\n* libvncserver: buffer overflow in ConnectClientToUnixSock() (CVE-2019-20839)\n\n* libvncserver: libvncserver/rfbregion.c has a NULL pointer dereference (CVE-2020-14397)\n\n* libvncserver: libvncclient/rfbproto.c does not limit TextChat size (CVE-2020-14405)\n\n* libvncserver: libvncserver/rfbserver.c has a divide by zero which could result in DoS (CVE-2020-25708)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.","status":"published","published":"2021-05-18T06:09:01Z","modified":"2026-10-29T11:00:51.550030413Z","updated_at":"2026-11-02T15:27:51.196609Z"},{"id":"DLA-2264-1","title":"libvncserver - security update","status":"published","published":"2020-06-30T00:00:00Z","modified":"2026-03-09T01:19:51.140889Z","updated_at":"2026-11-02T15:46:10.227108Z"},{"id":"DLA-2347-1","title":"libvncserver - security update","status":"published","published":"2020-08-28T00:00:00Z","modified":"2026-03-09T01:20:12.604709Z","updated_at":"2026-11-02T15:46:10.712745Z"},{"id":"MGASA-2020-0280","title":"Updated libvncserver packages fix security vulnerability","description":"Updated libvncserver packages fix security vulnerabilities:\n\nlibvncclient/sockets.c in LibVNCServer had a buffer overflow via a long\nsocket filename (CVE-2019-20839).\n\nlibvncserver/rfbregion.c had a NULL pointer dereference (CVE-2020-14397).\n\nByte-aligned data was accessed through uint32_t pointers in\nlibvncclient/rfbproto.c (CVE-2020-14399).\n\nByte-aligned data was accessed through uint16_t pointers in\nlibvncserver/translate.c (CVE-2020-14400).\n\nlibvncserver/scale.c had a pixel_value integer overflow (CVE-2020-14401).\n\nlibvncserver/corre.c allowed out-of-bounds access via encodings\n(CVE-2020-14402).\n\nlibvncserver/hextile.c allowed out-of-bounds access via encodings\n(CVE-2020-14403).\n\nlibvncserver/rre.c allowed out-of-bounds access via encodings\n(CVE-2020-14404).\n\nlibvncclient/rfbproto.c does not limit TextChat size (CVE-2020-14405).\n\nThe libvncserver package has been updated to version 0.9.13, fixing these\nissues and several others.  See the release announcement for details.\n","status":"published","published":"2020-07-05T19:48:23Z","modified":"2026-04-16T04:42:45.902870887Z","updated_at":"2026-11-02T15:49:41.151324Z"},{"id":"USN-4434-1","title":"libvncserver vulnerabilities","description":"Ramin Farajpour Cami discovered that LibVNCServer incorrectly handled\ncertain malformed unix socket names. A remote attacker could exploit this\nwith a crafted socket name, leading to a denial of service, or possibly\nexecute arbitrary code. (CVE-2019-20839)\n\nIt was discovered that LibVNCServer did not properly access byte-aligned\ndata. A remote attacker could possibly use this issue to cause\nLibVNCServer to crash, resulting in a denial of service. This issue only\naffected Ubuntu 18.04 LTS and Ubuntu 16.04 LTS. (CVE-2019-20840)\n\nChristian Beier discovered that LibVNCServer incorrectly handled anonymous\nTLS connections. A remote attacker could possibly use this issue to cause\nLibVNCServer to crash, resulting in a denial of service. This issue only\naffected Ubuntu 20.04 LTS. (CVE-2020-14396)\n\nIt was discovered that LibVNCServer incorrectly handled region clipping. A\nremote attacker could possibly use this issue to cause LibVNCServer to\ncrash, resulting in a denial of service. (CVE-2020-14397)\n\nIt was discovered that LibVNCServer did not properly reset incorrectly\nterminated TCP connections. A remote attacker could possibly use this\nissue to cause an infinite loop, resulting in a denial of service.\n(CVE-2020-14398)\n\nIt was discovered that LibVNCServer did not properly access byte-aligned\ndata. A remote attacker could possibly use this issue to cause\nLibVNCServer to crash, resulting in a denial of service. (CVE-2020-14399,\nCVE-2020-14400)\n\nIt was discovered that LibVNCServer incorrectly handled screen scaling on\nthe server side. A remote attacker could use this issue to cause\nLibVNCServer to crash, resulting in a denial of service, or possibly\nexecute arbitrary code. (CVE-2020-14401)\n\nIt was discovered that LibVNCServer incorrectly handled encodings. A\nremote attacker could use this issue to cause LibVNCServer to crash,\nresulting in a denial of service, or possibly execute arbitrary code.\n(CVE-2020-14402, CVE-2020-14403, CVE-2020-14404)\n\nIt was discovered that LibVNCServer incorrectly handled TextChat messages.\nA remote attacker could possibly use this issue to cause LibVNCServer to\ncrash, resulting in a denial of service. (CVE-2020-14405)\n","status":"published","published":"2020-07-23T20:09:25Z","modified":"2026-04-27T15:48:46.367539073Z","updated_at":"2026-11-02T16:58:14.547547Z"}]}}