{"id":"CVE-2018-14599","aliases":["ALPINE-CVE-2018-14599","BELL-CVE-2018-14599","CLSA-2026-1792607902","CLSA-2026-1792609205","DEBIAN-CVE-2018-14599","DLA-1482-1","EUVD-2018-6506","GHSA-4q9q-728x-j7v5","MGASA-2018-0377","RHSA-2019:2079","SUSE-SU-2018:2934-1","SUSE-SU-2018:2955-1","SUSE-SU-2018:3102-1","UBUNTU-CVE-2018-14599","USN-3758-1","openSUSE-SU-2024:10918-1"],"status":"published","title":"An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c is...","description":"An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c is vulnerable to an off-by-one error caused by malicious server responses, leading to DoS or possibly unspecified other 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issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c is vulnerable to an off-by-one error caused by malicious server responses, leading to DoS or possibly unspecified other impact.","status":"published","published":"2018-08-24T19:00:00Z","modified":"2024-08-05T09:29:51.671Z","updated_at":"2026-11-02T14:35:00.589142Z"}],"euvd":[{"id":"EUVD-2018-6506","description":"An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c is vulnerable to an off-by-one error caused by malicious server responses, leading to DoS or possibly unspecified other impact.","status":"published","published":"2018-08-24T19:00:00Z","modified":"2024-08-05T09:29:51Z","updated_at":"2026-11-03T02:39:46.696329Z"}],"ghsa":[{"id":"GHSA-4q9q-728x-j7v5","title":"An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c is...","description":"An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c is vulnerable to an off-by-one error caused by malicious server responses, leading to DoS or possibly unspecified other impact.","status":"published","published":"2022-05-13T01:19:08Z","modified":"2023-02-01T05:05:39Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-193"],"updated_at":"2026-11-02T14:50:16.372723Z"}],"nvd":[{"id":"CVE-2018-14599","description":"An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c is vulnerable to an off-by-one error caused by malicious server responses, leading to DoS or possibly unspecified other impact.","status":"published","published":"2018-08-24T19:29:01.457Z","modified":"2026-06-17T01:41:15.437Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-193"],"updated_at":"2026-11-02T14:04:36.842579Z"}],"osv":[{"id":"ALPINE-CVE-2018-14599","description":"An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c is vulnerable to an off-by-one error caused by malicious server responses, leading to DoS or possibly unspecified other impact.","status":"published","published":"2018-08-24T19:29:01.457Z","modified":"2026-10-23T17:17:55.216154468Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:27:47.187336Z"},{"id":"BELL-CVE-2018-14599","title":"CVE-2018-14599 does not affect BellSoft software","status":"withdrawn","published":"2023-08-31T12:15:51.635563Z","modified":"2026-09-06T07:15:06.876343398Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:28:14.701973Z"},{"id":"CVE-2018-14599","description":"An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c is vulnerable to an off-by-one error caused by malicious server responses, leading to DoS or possibly unspecified other impact.","status":"published","published":"2018-08-24T19:29:01.457Z","modified":"2026-10-24T10:49:37.735661616Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:08.242347Z"},{"id":"DEBIAN-CVE-2018-14599","description":"An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c is vulnerable to an off-by-one error caused by malicious server responses, leading to DoS or possibly unspecified other impact.","status":"published","published":"2018-08-24T19:29:01.457Z","modified":"2026-10-23T18:02:59.45955359Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:30.290351Z"},{"id":"RHSA-2019:2079","title":"Red Hat Security Advisory: Xorg security and bug fix update","status":"published","published":"2024-09-16T02:01:36Z","modified":"2026-06-30T10:01:25Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:06.0195Z"},{"id":"UBUNTU-CVE-2018-14599","description":"An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c is vulnerable to an off-by-one error caused by malicious server responses, leading to DoS or possibly unspecified other impact.","status":"published","published":"2018-08-24T00:00:00Z","modified":"2026-04-22T11:45:56.728595Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"},{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:54:17.014176Z"},{"id":"CLSA-2026-1792607902","title":"libX11: Fix of 6 CVEs","description":"- CVE-2018-14599: fix off-by-one writes in XListExtensions, XGetFontPath and XListFonts\n- CVE-2018-14600: fix out-of-bounds write in XListExtensions and XGetFontPath\n- CVE-2018-14598: fix crash on invalid reply in XListExtensions and XGetFontPath\n- CVE-2021-31535: reject strings longer than USHRT_MAX before sending them on the wire\n- CVE-2023-3138: add bounds checks for extension request, event and error codes\n- CVE-2023-43787: fix integer overflow in XCreateImage leading to heap overflow","status":"published","published":"2026-10-21T18:38:38Z","modified":"2026-10-26T09:43:55.624481177Z","updated_at":"2026-11-02T15:43:54.672859Z"},{"id":"CLSA-2026-1792609205","title":"libX11: Fix of 6 CVEs","description":"- CVE-2018-14599: fix off-by-one writes in XListExtensions, XGetFontPath and XListFonts\n- CVE-2018-14600: fix out-of-bounds write in XListExtensions and XGetFontPath\n- CVE-2018-14598: fix crash on invalid reply in XListExtensions and XGetFontPath\n- CVE-2021-31535: reject strings longer than USHRT_MAX before sending them on the wire\n- CVE-2023-3138: add bounds checks for extension request, event and error codes\n- CVE-2023-43787: fix integer overflow in XCreateImage leading to heap overflow","status":"published","published":"2026-10-21T20:48:54Z","modified":"2026-10-26T09:43:44.530069186Z","updated_at":"2026-11-02T15:43:54.672859Z"},{"id":"DLA-1482-1","title":"libx11 - security update","status":"published","published":"2018-08-29T00:00:00Z","modified":"2026-03-09T01:21:46.445278Z","updated_at":"2026-11-02T15:46:09.777694Z"},{"id":"MGASA-2018-0377","title":"Updated libx11 packages fix security vulnerabilities","description":"Updated libx11 packages fix security vulnerabilities:\n\nAn issue was discovered in XListExtensions in ListExt.c in libX11 through\n1.6.5. A malicious server can send a reply in which the first string\noverflows, causing a variable to be set to NULL that will be freed later\non, leading to DoS (segmentation fault) (CVE-2018-14598).\n\nAn issue was discovered in libX11 through 1.6.5. The function\nXListExtensions in ListExt.c is vulnerable to an off-by-one error caused\nby malicious server responses, leading to DoS or possibly unspecified\nother impact (CVE-2018-14599).\n\nAn issue was discovered in libX11 through 1.6.5. The function\nXListExtensions in ListExt.c interprets a variable as signed instead of\nunsigned, resulting in an out-of-bounds write (of up to 128 bytes),\nleading to DoS or remote code execution (CVE-2018-14600).\n","status":"published","published":"2018-09-20T23:17:55Z","modified":"2026-04-16T06:24:20.776658887Z","updated_at":"2026-11-02T15:49:40.793816Z"},{"id":"openSUSE-SU-2024:10918-1","title":"libX11-6-1.7.2-1.2 on GA media","description":"These are all security issues fixed in the libX11-6-1.7.2-1.2 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T04:15:02.211499Z","updated_at":"2026-11-02T16:58:34.894275Z"},{"id":"SUSE-SU-2018:2934-1","title":"Security update for xorg-x11-libX11","description":"This update for xorg-x11-libX11 fixes the following issues:\n\n- CVE-2018-14599: The function XListExtensions was vulnerable to an off-by-one\n  error caused by malicious server responses, leading to DoS or possibly\n  unspecified other impact (bsc#1102062)\n- CVE-2018-14600: The function XListExtensions interpreted a variable as signed\n  instead of unsigned, resulting in an out-of-bounds write (of up to 128 bytes),\n  leading to DoS or remote code execution (bsc#1102068)\n- CVE-2018-14598: A malicious server could have sent a reply in which the first\n  string overflows, causing a variable to be set to NULL that will be freed later\n  on, leading to DoS (segmentation fault) (bsc#1102073)\n","status":"published","published":"2018-09-28T08:56:15Z","modified":"2026-02-04T02:57:56.125549Z","updated_at":"2026-11-02T15:53:45.378228Z"},{"id":"SUSE-SU-2018:2955-1","title":"Security update for libX11","description":"This update for libX11 fixes the following security issues:\n\n- CVE-2018-14599: The function XListExtensions was vulnerable to an off-by-one\n  error caused by malicious server responses, leading to DoS or possibly\n  unspecified other impact (bsc#1102062)\n- CVE-2018-14600: The function XListExtensions interpreted a variable as signed\n  instead of unsigned, resulting in an out-of-bounds write (of up to 128 bytes),\n  leading to DoS or remote code execution (bsc#1102068)\n- CVE-2018-14598: A malicious server could have sent a reply in which the first\n  string overflows, causing a variable to be set to NULL that will be freed later\n  on, leading to DoS (segmentation fault) (bsc#1102073)\n","status":"published","published":"2018-09-30T12:06:31Z","modified":"2026-02-04T03:08:16.163458Z","updated_at":"2026-11-02T15:53:45.378228Z"},{"id":"SUSE-SU-2018:3102-1","title":"Security update for libX11 and libxcb","description":"This update for libX11 and libxcb fixes the following issue:\n\nlibX11:\n\nThese security issues were fixed:\n\n- CVE-2018-14599: The function XListExtensions was vulnerable to an off-by-one\n  error caused by malicious server responses, leading to DoS or possibly\n  unspecified other impact (bsc#1102062).\n- CVE-2018-14600: The function XListExtensions interpreted a variable as signed\n  instead of unsigned, resulting in an out-of-bounds write (of up to 128 bytes),\n  leading to DoS or remote code execution (bsc#1102068).\n- CVE-2018-14598: A malicious server could have sent a reply in which the first\n  string overflows, causing a variable to be set to NULL that will be freed later\n  on, leading to DoS (segmentation fault) (bsc#1102073).\n\nThis non-security issue was fixed:\n\n- Make use of the new 64-bit sequence number API in XCB 1.11.1 to avoid the 32-bit\n  sequence number wrap in libX11 (bsc#1094327).\n\nlibxcb:\n\n- Expose 64-bit sequence number from XCB API so that Xlib and others can use it even\n  on 32-bit environment. (bsc#1094327)\n","status":"published","published":"2018-10-11T18:46:34Z","modified":"2025-05-02T04:07:47.103513Z","updated_at":"2026-11-02T15:53:45.378228Z"},{"id":"USN-3758-1","title":"libx11 vulnerabilities","description":"Tobias Stoeckmann discovered that libx11 incorrectly handled certain images.\nAn attacker could possibly use this issue to access sensitive information\n(CVE-2016-7942)\n\nTobias Stoeckmann discovered that libx11 incorrectly handled certain inputs.\nAn attacker could possibly use this issue to access sensitive information.\n(CVE-2016-7943)\n\nIt was discovered that libx11 incorrectly handled certain inputs.\nAn attacker could possibly use this issue to cause a denial of service.\n(CVE-2018-14598, CVE-2018-14599, CVE-2018-14600)\n","status":"published","published":"2018-08-30T17:28:11Z","modified":"2026-04-22T09:49:10.620763Z","updated_at":"2026-11-02T16:58:14.019824Z"}]}}