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Oracle Critical Patch Update April 2021

Released April 2021 · Oracle's advisory ↗ · ← Critical Patch Update, January 2021 · Critical Patch Update, July 2021 →

258 CVEs in this release, one square each

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Share this chart Oracle Critical Patch Update April 2021, one square per CVE: 137 Java CVEs, 19 protected by Waratek, 7 exploited, 121 other CVEs in this release.

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19Protected by Waratek3Mitigation candidate115No exploit published67Outside Waratek scope54Not applicable 7Exploited, marked by the ring

No exploit published. For 97 of them, Oracle's security advisory is the source of public detail.

Protected by Waratek. Waratek RASP can block exploitation of these on systems that have not applied the patch yet.

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Including CVEs outside Waratek scope✕
Overview 2 matches · 1 in Waratek scope · 0 protected · 0 exploited · 0 CISA KEV · 0 public PoC
2matches 1in Waratek scope50.0% 0protected0.0% 0exploited0.0% 0CISA KEV0.0% 0public PoC0.0%
Protected by Waratek 0 0.0% Rule in development 0 0.0% Mitigation candidate 0 0.0% No exploit published 1 50.0% Outside Waratek scope 1 50.0% Not applicable 0 0.0% Withdrawn CVE 0 0.0%
Critical 0 0.0% High 0 0.0% Medium 2 100.0% Low 0 0.0% None 0 0.0% Unknown 0 0.0%
blocked by ARMR today 0 0.0% partly blocked 0 0.0% not blocked 2 100.0% not established 0 0.0% unrecorded 0 0.0%
Exploited 0 0.0% Working exploit published 0 0.0% Proof of concept only 0 0.0% Forecast only 2 100.0% No public exploit 0 0.0%
split by peak 1 / month
Outside Waratek scope: 1No exploit published: 1 Medium: 2 not blocked: 2 Forecast only: 2
Apr 201 Outside Waratek scope1 Medium1 not blocked1 Forecast only1 May 200 Jun 200 Jul 200 Aug 200 Sep 200 Oct 200 Nov 200 Dec 200 Jan 210 Feb 211 No exploit published1 Medium1 not blocked1 Forecast only1
Apr 20May 20Jun 20Jul 20Aug 20Sep 20Oct 20Nov 20Dec 20Jan 21Feb 21
2 matches Sign in to download these CVEs as CSV or JSON, or to follow them in a feed.
CVE Severity Published▾ Status Exploitation Description
CVE-2020-27223 Medium 2021-02-26 No exploit published Forecast only In Eclipse Jetty 9.4.6.v20170531 to 9.4.36.v20210114 (inclusive), 10.0.0, and 11.0.0 when Jetty handles a request containing multiple Accept headers with a large number of “quality” (i.e. q) parameters, the server may enter a denial of service (DoS) state due to high CPU usage processing those quality values, resulting in minutes of CPU time exhausted processing those quality values.
CVE-2020-1927 Medium 2020-04-02 Outside Waratek scope Forecast only In Apache HTTP Server 2.4.0 to 2.4.41, redirects configured with mod_rewrite that were intended to be self-referential might be fooled by encoded newlines and redirect instead to an an unexpected URL within the request URL.