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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.3873 varnish:6 security, bug fix, and enhancement update 6 November 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: varnish:6 Publisher: Red Hat Operating System: Red Hat Impact/Access: Denial of Service -- Remote/Unauthenticated Access Confidential Data -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2020-11653 CVE-2019-20637 CVE-2019-15892 Reference: ESB-2019.3356 Original Bulletin: https://access.redhat.com/errata/RHSA-2020:4756 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: varnish:6 security, bug fix, and enhancement update Advisory ID: RHSA-2020:4756-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2020:4756 Issue date: 2020-11-03 CVE Names: CVE-2019-15892 CVE-2019-20637 CVE-2020-11653 ===================================================================== 1. Summary: An update for the varnish:6 module is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64 3. Description: Varnish Cache is a high-performance HTTP accelerator. It stores web pages in memory so web servers don't have to create the same web page over and over again, giving the website a significant speed up. The following packages have been upgraded to a later upstream version: varnish (6.0.6). (BZ#1795673) Security Fix(es): * varnish: denial of service handling certain crafted HTTP/1 requests (CVE-2019-15892) * varnish: remote clients may cause Varnish to assert and restart which could result in DoS (CVE-2020-11653) * varnish: not clearing pointer between two client requests leads to information disclosure (CVE-2019-20637) For 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. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.3 Release Notes linked from the References section. 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 1756079 - CVE-2019-15892 varnish: denial of service handling certain crafted HTTP/1 requests 1772362 - CVE-2019-20637 varnish: not clearing pointer between two client requests leads to information disclosure 1813867 - CVE-2020-11653 varnish: remote clients may cause Varnish to assert and restart which could result in DoS 6. Package List: Red Hat Enterprise Linux AppStream (v. 8): Source: varnish-6.0.6-2.module+el8.3.0+6843+b3b42fcc.src.rpm varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.src.rpm aarch64: varnish-6.0.6-2.module+el8.3.0+6843+b3b42fcc.aarch64.rpm varnish-devel-6.0.6-2.module+el8.3.0+6843+b3b42fcc.aarch64.rpm varnish-docs-6.0.6-2.module+el8.3.0+6843+b3b42fcc.aarch64.rpm varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.aarch64.rpm varnish-modules-debuginfo-0.15.0-5.module+el8.3.0+6843+b3b42fcc.aarch64.rpm varnish-modules-debugsource-0.15.0-5.module+el8.3.0+6843+b3b42fcc.aarch64.rpm ppc64le: varnish-6.0.6-2.module+el8.3.0+6843+b3b42fcc.ppc64le.rpm varnish-devel-6.0.6-2.module+el8.3.0+6843+b3b42fcc.ppc64le.rpm varnish-docs-6.0.6-2.module+el8.3.0+6843+b3b42fcc.ppc64le.rpm varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.ppc64le.rpm varnish-modules-debuginfo-0.15.0-5.module+el8.3.0+6843+b3b42fcc.ppc64le.rpm varnish-modules-debugsource-0.15.0-5.module+el8.3.0+6843+b3b42fcc.ppc64le.rpm s390x: varnish-6.0.6-2.module+el8.3.0+6843+b3b42fcc.s390x.rpm varnish-devel-6.0.6-2.module+el8.3.0+6843+b3b42fcc.s390x.rpm varnish-docs-6.0.6-2.module+el8.3.0+6843+b3b42fcc.s390x.rpm varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.s390x.rpm varnish-modules-debuginfo-0.15.0-5.module+el8.3.0+6843+b3b42fcc.s390x.rpm varnish-modules-debugsource-0.15.0-5.module+el8.3.0+6843+b3b42fcc.s390x.rpm x86_64: varnish-6.0.6-2.module+el8.3.0+6843+b3b42fcc.x86_64.rpm varnish-devel-6.0.6-2.module+el8.3.0+6843+b3b42fcc.x86_64.rpm varnish-docs-6.0.6-2.module+el8.3.0+6843+b3b42fcc.x86_64.rpm varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64.rpm varnish-modules-debuginfo-0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64.rpm varnish-modules-debugsource-0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2019-15892 https://access.redhat.com/security/cve/CVE-2019-20637 https://access.redhat.com/security/cve/CVE-2020-11653 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.3_release_notes/ 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2020 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBX6I3bNzjgjWX9erEAQhHsRAAg5AnxfkUaiyfPUeRP6xNRYXjum6afPEL TkdJ6Q3ZgXR3HZl6GpC1F7jxdVRc3kEVSrSOzcVN/mgZXXlDkBkexEAM8ZtM0PSN Lf2glfxE1w88SODqXrSBXIPeM1SwaJDuFq5HcDqE3e1QyoJQWkuqIZkuwQXRz3JY 76wCJ+y+WLiuwNz11oTmcVpc6rqh7GJtRuTPaQNwoOFsw72V6Mhik7Q/O9nnyBpz OkHJ8uuDMu1EVfnEysoxaotVJU2SsNUgaFqTt4JWO/t0CoKUGDTGm01fr2yr4DET QAs+5qWSupcGSewmfZ0EtOMf/5wloCyVjoYNpoTeDI+rcL8+k3WactsAjNOjP1Wk xt6dqBQNgorfKWKsVI3nYkxokVrP/333vsdY97DOME6qNYNP7TMHkz4wro9YsJqP z77jQ8m18FSCOUCZKs97lO+3vPR8S6LNCl07oo9lLku1lSMDqkNDaiyQ5r1fRANt OHNndVMwEQ97HnUnKIE7wNtwClC7inPtpPeHueFSENAwDCAImxuRXGz0DZQ2Qk/Y SexQV9VJmE+gDHtZS1ynasgZFsb+dVbnNubrjRMDbhiptbhFyimRKPqmwzX8U4Rx +ZzNn6PuGk5ABsd8aQsmomOBhOPFzDvEMNGWW8mBiVL/ErdIpWyyrDwsc2H6LsAE Bj2XWgWfRVg= =/Cef - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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