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CVE-2019-20637

Status Candidate

Overview

An issue was discovered in Varnish Cache before 6.0.5 LTS, 6.1.x and 6.2.x before 6.2.2, and 6.3.x before 6.3.1. It does not clear a pointer between the handling of one client request and the next request within the same connection. This sometimes causes information to be disclosed from the connection workspace, such as data structures associated with previous requests within this connection or VCL-related temporary headers.

Related Files

Ubuntu Security Notice USN-5474-1
Posted Jun 9, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5474-1 - 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. 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.

tags | advisory, remote
systems | linux, ubuntu
advisories | CVE-2019-20637, CVE-2020-11653, CVE-2021-36740, CVE-2022-23959
SHA-256 | 5974b74ed2f5b285513dbf02f7b51df56bc6247a280243707c50784d224f5c90
Red Hat Security Advisory 2020-4756-01
Posted Nov 4, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-4756-01 - 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. Issues addressed include denial of service and information leakage vulnerabilities.

tags | advisory, web, denial of service, vulnerability
systems | linux, redhat
advisories | CVE-2019-15892, CVE-2019-20637, CVE-2020-11653
SHA-256 | fdc73995495cf1695de4dbbeabae1e8e035727f03673f92adcac9db34e567f19
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