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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2022.2831 USN-5474-1: Varnish Cache vulnerabilities 9 June 2022 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: varnish cache Publisher: Ubuntu Operating System: Ubuntu Resolution: Patch/Upgrade CVE Names: CVE-2022-23959 CVE-2021-36740 CVE-2020-11653 CVE-2019-20637 Original Bulletin: https://ubuntu.com/security/notices/USN-5474-1 Comment: CVSS (Max): 9.1 CVE-2022-23959 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N) CVSS Source: NVD Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - --------------------------BEGIN INCLUDED TEXT-------------------- USN-5474-1: Varnish Cache vulnerabilities 8 June 2022 Several security issues were fixed in Varnish Cache. Releases o Ubuntu 22.04 LTS o Ubuntu 21.10 o Ubuntu 20.04 LTS o Ubuntu 18.04 LTS Packages o varnish - state of the art, high-performance web accelerator Details It was dicovered that Varnish Cache did not clear a pointer between the handling of one client request and the next request within the same connection. A remote attacker could possibly use this issue to obtain sensitive information. ( CVE-2019-20637 ) It was discovered that Varnish Cache could have an assertion failure when a TLS termination proxy uses PROXY version 2. A remote attacker could possibly use this issue to restart the daemon and cause a performance loss. ( CVE-2020-11653 ) It was discovered that Varnish Cache allowed request smuggling and VCL authorization bypass via a large Content-Length header for a POST request. A remote attacker could possibly use this issue to obtain sensitive information. ( CVE-2021-36740 ) It was discovered that Varnish Cache allowed request smuggling for HTTP/1 connections. A remote attacker could possibly use this issue to obtain sensitive information. ( CVE-2022-23959 ) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 o varnish - 6.6.1-1ubuntu0.2 o libvarnishapi2 - 6.6.1-1ubuntu0.2 Ubuntu 21.10 o varnish - 6.5.2-1ubuntu0.2 o libvarnishapi2 - 6.5.2-1ubuntu0.2 Ubuntu 20.04 o varnish - 6.2.1-2ubuntu0.1 o libvarnishapi2 - 6.2.1-2ubuntu0.1 Ubuntu 18.04 o varnish - 5.2.1-1ubuntu0.1 o libvarnishapi1 - 5.2.1-1ubuntu0.1 In general, a standard system update will make all the necessary changes. References o CVE-2021-36740 o CVE-2019-20637 o CVE-2022-23959 o CVE-2020-11653 Related notices o USN-5166-1 : libvarnishapi2, varnish-doc, varnish, libvarnishapi-dev - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: https://auscert.org.au/gpg-key/ iQIVAwUBYqFuK8kNZI30y1K9AQiUQxAAud1nosRd4bxImphbisG3c1vCcH1izmkt lCj+9I9nx88wpb/TTyiNf8U9E57cqS7O/InHumoTJkRah2z1pQkeO404fyBsf/MH W5EBo1PSlip0dti/dQnfQptpWwf4qhqOuG5nZpkdiqbhJggb4WLGR6Uzdx/kTlmy wY2V7YrW5eWF4js4b3n+AKy8+AKtoltU2DDfKi+1qf+h93ijtDzbMF6RpGP+W1hi PbRL64Jb+rzZbSmDfA+XoYhiG7b3PkYih3IvvFF9L2O2tqFFXrNlCxcyO9nc+AQf xKa4sG+BCKYvn9lMRBbLe3RjAWPpeilME3auhIZi5cGYIXRB9t8QMgbgyr1E4Evl cQiZqexgKlkn5mFzNs5zYEJcorVQG2iT1YKB5JpfaYltHPWc0cnY8WsgP3DjRQUw wo75xuYmH8RaRnJ5AVCNpQlM274Q6RpJGHTQ37JJKkqWNnVtpgAnU4je7c30tmoN p0hSQAwEm4hkuNGRhQVHEcskUS+vyIZvBirrRBp/zE6V+uDYBC7g7SFUZ99fIywD UyapsenKiZbpVyFAsIt4IEf0Mu48T8FiLnPaxfYADVavJ9B2XyYHWBtJc274Ckkl ljw5+2maP2vt1RfW6V6J8qGJyHcDhuZa1cdo8wlpuiTqYh4Zc7ko1RdOAdnM3q0F d372fe218Hg= =2OlM -----END PGP SIGNATURE-----