{"id":"CVE-2020-9490","aliases":["ALPINE-CVE-2020-9490","BELL-CVE-2020-9490","BIT-apache-2020-9490","DEBIAN-CVE-2020-9490","DSA-4757-1","EUVD-2020-30299","GHSA-f2jx-wr3j-25w5","MGASA-2020-0327","RHSA-2020:3714","RHSA-2020:3726","RHSA-2020:3733","RHSA-2020:3734","SUSE-SU-2020:2311-1","SUSE-SU-2020:2344-1","SUSE-SU-2020:2450-1","SUSE-SU-2020:3067-1","UBUNTU-CVE-2020-9490","USN-4458-1","openSUSE-SU-2020:1285-1","openSUSE-SU-2020:1293-1","openSUSE-SU-2020:1792-1"],"status":"published","title":"Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest'...","description":"Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via \"H2Push off\" will mitigate this vulnerability for unpatched servers.","severity":{"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","from":"nvd"},"epss":{"day":"2026-11-09","score":0.88844,"percentile":0.99778,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-444"],"published":"2020-08-07T15:24:49Z","modified":"2026-10-26T12:00:12Z","fixes":[{"ecosystem":"Alpine:v3.10","package":"apache2","fixed_in":["2.4.46-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.11","package":"apache2","fixed_in":["2.4.46-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.12","package":"apache2","fixed_in":["2.4.46-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.13","package":"apache2","fixed_in":["2.4.46-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"apache2","fixed_in":["2.4.46-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"apache2","fixed_in":["2.4.46-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"apache2","fixed_in":["2.4.46-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"apache2","fixed_in":["2.4.46-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"apache2","fixed_in":["2.4.46-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"apache2","fixed_in":["2.4.46-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"apache2","fixed_in":["2.4.46-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"apache2","fixed_in":["2.4.46-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"apache2","fixed_in":["2.4.46-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"apache2","fixed_in":["2.4.46-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"apache2","fixed_in":["2.4.46-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.9","package":"apache2","fixed_in":["2.4.46-r0"],"sources":["osv"]},{"ecosystem":"Bitnami","package":"apache","fixed_in":["2.4.46"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"apache2","fixed_in":["2.4.46-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"apache2","fixed_in":["2.4.46-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"apache2","fixed_in":["2.4.46-1"],"sources":["osv"]},{"ecosystem":"Red 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HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via \"H2Push off\" will mitigate this vulnerability for unpatched servers.","status":"published","published":"2020-08-07T15:24:49Z","modified":"2024-08-04T10:26:16.299Z","updated_at":"2026-11-02T14:35:49.538427Z"}],"euvd":[{"id":"EUVD-2020-30299","description":"Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via \"H2Push off\" will mitigate this vulnerability for unpatched servers.","status":"published","published":"2020-08-07T15:24:49Z","modified":"2024-08-04T10:26:16Z","updated_at":"2026-11-03T03:07:54.025234Z"}],"ghsa":[{"id":"GHSA-f2jx-wr3j-25w5","title":"Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest'...","description":"Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via \"H2Push off\" will mitigate this vulnerability for unpatched servers.","status":"published","published":"2022-05-24T17:25:05Z","modified":"2023-01-29T05:00:50Z","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"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T14:44:40.694561Z"}],"nvd":[{"id":"CVE-2020-9490","description":"Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via \"H2Push off\" will mitigate this vulnerability for unpatched servers.","status":"published","published":"2020-08-07T16:15:12.043Z","modified":"2026-06-17T03:28:03.13Z","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-444"],"updated_at":"2026-11-02T14:06:10.994748Z"}],"osv":[{"id":"ALPINE-CVE-2020-9490","description":"Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via \"H2Push off\" will mitigate this vulnerability for unpatched servers.","status":"published","published":"2020-08-07T16:15:12.043Z","modified":"2026-10-26T11:17:55.193686953Z","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":"2026-11-02T15:27:48.646074Z"},{"id":"BELL-CVE-2020-9490","title":"CVE-2020-9490 does not affect BellSoft software","status":"withdrawn","published":"2023-08-31T12:14:38.831034Z","modified":"2026-01-26T09:48:15.390522Z","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":"2026-11-02T15:28:15.925958Z"},{"id":"CVE-2020-9490","description":"Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via \"H2Push off\" will mitigate this vulnerability for unpatched servers.","status":"published","published":"2020-08-07T16:15:12.043Z","modified":"2026-10-24T10:30:33.60285989Z","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":"2026-11-02T15:44:17.663289Z"},{"id":"DEBIAN-CVE-2020-9490","description":"Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via \"H2Push off\" will mitigate this vulnerability for unpatched servers.","status":"published","published":"2020-08-07T16:15:12.043Z","modified":"2026-10-26T12:00:12.621562684Z","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":"2026-11-02T15:45:34.311861Z"},{"id":"RHSA-2020:3714","title":"Red Hat Security Advisory: httpd:2.4 security update","status":"published","published":"2024-09-13T22:42:47Z","modified":"2026-08-04T10:03:17Z","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":"2026-11-02T15:53:07.57369Z"},{"id":"RHSA-2020:3726","title":"Red Hat Security Advisory: httpd:2.4 security update","status":"published","published":"2024-09-13T22:43:01Z","modified":"2026-08-04T10:03:18Z","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":"2026-11-02T15:53:07.57369Z"},{"id":"RHSA-2020:3733","title":"Red Hat Security Advisory: httpd24-httpd security update","status":"published","published":"2024-09-13T22:42:10Z","modified":"2026-08-04T10:03:19Z","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":"2026-11-02T15:53:07.57369Z"},{"id":"RHSA-2020:3734","title":"Red Hat Security Advisory: httpd:2.4 security update","status":"published","published":"2024-09-13T22:42:17Z","modified":"2026-08-04T10:03:19Z","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":"2026-11-02T15:53:07.57369Z"},{"id":"UBUNTU-CVE-2020-9490","description":"Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via \"H2Push off\" will mitigate this vulnerability for unpatched servers.","status":"published","published":"2020-08-07T16:15:00Z","modified":"2026-04-22T12:43:52.741412Z","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":"2026-11-02T15:54:25.728622Z"},{"id":"BIT-apache-2020-9490","description":"Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via \"H2Push off\" will mitigate this vulnerability for unpatched servers.","status":"published","published":"2024-03-06T10:56:35.882Z","modified":"2026-09-08T08:45:30.399429806Z","updated_at":"2026-11-02T15:28:28.267217Z"},{"id":"DSA-4757-1","title":"apache2 - security update","status":"published","published":"2020-08-31T00:00:00Z","modified":"2026-03-09T02:08:45.454252Z","updated_at":"2026-11-02T15:46:17.19998Z"},{"id":"MGASA-2020-0327","title":"Updated apache packages fix security vulnerability","description":"Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the\n'Cache-Digest' header in a HTTP/2 request would result in a crash when the\nserver actually tries to HTTP/2 PUSH a resource afterwards. Configuring the\nHTTP/2 feature via \"H2Push off\" will mitigate this vulnerability for unpatched\nservers (CVE-2020-9490).\n\nApache HTTP server 2.4.32 to 2.4.44 mod_proxy_uwsgi info disclosure and\npossible remote code execution (CVE-2020-11984).\n\nApache HTTP Server versions 2.4.20 to 2.4.43 When trace/debug was enabled for\nthe HTTP/2 module and on certain traffic edge patterns, logging statements were\nmade on the wrong connection, causing concurrent use of memory pools.\nConfiguring the LogLevel of mod_http2 above \"info\" will mitigate this\nvulnerability for unpatched servers (CVE-2020-11993).\n\nThe apache package has been updated to version 2.4.46, fixing these issues and\nother bugs.  See the upstream CHANGES file for details.\n","status":"published","published":"2020-08-18T17:41:27Z","modified":"2026-04-16T04:44:19.086483674Z","updated_at":"2026-11-02T15:49:41.151324Z"},{"id":"openSUSE-SU-2020:1285-1","title":"Security update for apache2","description":"This update for apache2 fixes the following issues:\n\n- CVE-2020-9490: Fixed a crash caused by a specially crafted value for the 'Cache-Digest' header in a HTTP/2 request (bsc#1175071).\n- CVE-2020-11984: Fixed an information disclosure bug in mod_proxy_uwsgi (bsc#1175074).\n- CVE-2020-11993: When trace/debug was enabled for the HTTP/2 module logging statements were made on the wrong connection (bsc#1175070).\n\n- Solve a crash in mod_proxy_uwsgi for empty values of environment variables. (bsc#1174052)\n\nThis update was imported from the SUSE:SLE-15-SP2:Update update project.","status":"published","published":"2020-08-29T10:24:11Z","modified":"2026-02-04T04:08:03.534211Z","updated_at":"2026-11-02T16:58:31.517538Z"},{"id":"openSUSE-SU-2020:1293-1","title":"Security update for apache2","description":"This update for apache2 fixes the following issues:\n\n- CVE-2020-9490: Fixed a crash caused by a specially crafted value for the 'Cache-Digest' header in a HTTP/2 request (bsc#1175071).\n- CVE-2020-11984: Fixed an information disclosure bug in mod_proxy_uwsgi (bsc#1175074).\n- CVE-2020-11993: When trace/debug was enabled for the HTTP/2 module logging statements were made on the wrong connection (bsc#1175070).\n\nThis update was imported from the SUSE:SLE-15:Update update project.","status":"published","published":"2020-08-30T04:23:10Z","modified":"2026-02-04T02:36:12.659135Z","updated_at":"2026-11-02T16:58:31.517538Z"},{"id":"openSUSE-SU-2020:1792-1","title":"Security update for apache2","description":"This update for apache2 fixes the following issues:\n\n- Enables the patch for CVE-2020-11993 and CVE-2020-9490. The patch was included but \n  not applied in the previous update. (bsc#1178074)\n\nThis update was imported from the SUSE:SLE-15:Update update project.","status":"published","published":"2020-10-31T15:24:44Z","modified":"2026-02-04T02:32:40.377526Z","updated_at":"2026-11-02T16:58:31.517538Z"},{"id":"SUSE-SU-2020:2311-1","title":"Security update for apache2","description":"This update for apache2 fixes the following issues:\n\n- CVE-2020-9490: Fixed a crash caused by a specially crafted value for the 'Cache-Digest' header in a HTTP/2 request (bsc#1175071).\n- CVE-2020-11984: Fixed an information disclosure bug in mod_proxy_uwsgi (bsc#1175074).\n- CVE-2020-11993: When trace/debug was enabled for the HTTP/2 module logging statements were made on the wrong connection (bsc#1175070).\n\n- Solve a crash in mod_proxy_uwsgi for empty values of environment variables. (bsc#1174052)\n","status":"published","published":"2020-08-25T12:50:06Z","modified":"2026-02-04T04:10:18.285251Z","updated_at":"2026-11-02T15:53:48.11786Z"},{"id":"SUSE-SU-2020:2344-1","title":"Security update for apache2","description":"This update for apache2 fixes the following issues:\n\n- CVE-2020-9490: Fixed a crash caused by a specially crafted value for the 'Cache-Digest' header in a HTTP/2 request (bsc#1175071).\n- CVE-2020-11984: Fixed an information disclosure bug in mod_proxy_uwsgi (bsc#1175074).\n- CVE-2020-11993: When trace/debug was enabled for the HTTP/2 module logging statements were made on the wrong connection (bsc#1175070).\n","status":"published","published":"2020-08-26T15:02:04Z","modified":"2026-02-04T03:20:16.513711Z","updated_at":"2026-11-02T15:53:48.11786Z"},{"id":"SUSE-SU-2020:2450-1","title":"Security update for apache2","description":"This update for apache2 fixes the following issues:\n\n- CVE-2020-9490: Fixed a crash caused by a specially crafted value for the 'Cache-Digest' header in a HTTP/2 request (bsc#1175071).\n- CVE-2020-11985: IP address spoofing when proxying using mod_remoteip and mod_rewrite (bsc#1175072).\n- CVE-2020-11993: When trace/debug was enabled for the HTTP/2 module logging statements were made on the wrong connection (bsc#1175070).\n","status":"published","published":"2020-09-02T09:48:12Z","modified":"2026-02-04T03:10:01.206021Z","updated_at":"2026-11-02T15:53:48.11786Z"},{"id":"SUSE-SU-2020:3067-1","title":"Security update for apache2","description":"This update for apache2 fixes the following issues:\n\n- Enables the patch for CVE-2020-11993 and CVE-2020-9490. The patch was included but \n  not applied in the previous update. (bsc#1178074)\n","status":"published","published":"2020-10-28T10:46:08Z","modified":"2026-02-04T02:29:10.758935Z","updated_at":"2026-11-02T15:53:48.11786Z"},{"id":"USN-4458-1","title":"apache2 vulnerabilities","description":"Fabrice Perez discovered that the Apache mod_rewrite module incorrectly\nhandled certain redirects. A remote attacker could possibly use this issue\nto perform redirects to an unexpected URL. (CVE-2020-1927)\n\nChamal De Silva discovered that the Apache mod_proxy_ftp module incorrectly\nhandled memory when proxying to a malicious FTP server. A remote attacker\ncould possibly use this issue to obtain sensitive information.\n(CVE-2020-1934)\n\nFelix Wilhelm discovered that the HTTP/2 implementation in Apache did not\nproperly handle certain Cache-Digest headers. A remote attacker could\npossibly use this issue to cause Apache to crash, resulting in a denial of\nservice. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.\n(CVE-2020-9490)\n\nFelix Wilhelm discovered that the Apache mod_proxy_uwsgi module incorrectly\nhandled large headers. A remote attacker could use this issue to obtain\nsensitive information or possibly execute arbitrary code. This issue only\naffected Ubuntu 20.04 LTS. (CVE-2020-11984)\n\nFelix Wilhelm discovered that the HTTP/2 implementation in Apache did not\nproperly handle certain logging statements. A remote attacker could\npossibly use this issue to cause Apache to crash, resulting in a denial of\nservice. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.\n(CVE-2020-11993)\n","status":"published","published":"2020-08-13T14:27:59Z","modified":"2026-04-27T18:47:21.658956594Z","updated_at":"2026-11-02T16:58:14.547547Z"}]}}