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CVE-2020-24606

Status Candidate

Overview

Squid before 4.13 and 5.x before 5.0.4 allows a trusted peer to perform Denial of Service by consuming all available CPU cycles during handling of a crafted Cache Digest response message. This only occurs when cache_peer is used with the cache digests feature. The problem exists because peerDigestHandleReply() livelocking in peer_digest.cc mishandles EOF.

Related Files

Red Hat Security Advisory 2020-4743-01
Posted Nov 4, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-4743-01 - Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects. Issues addressed include buffer overflow, bypass, cross site request forgery, denial of service, heap overflow, information leakage, and out of bounds read vulnerabilities.

tags | advisory, web, denial of service, overflow, vulnerability, csrf
systems | linux, redhat
advisories | CVE-2019-12520, CVE-2019-12521, CVE-2019-12523, CVE-2019-12524, CVE-2019-12526, CVE-2019-12528, CVE-2019-12529, CVE-2019-12854, CVE-2019-18676, CVE-2019-18677, CVE-2019-18678, CVE-2019-18679, CVE-2019-18860, CVE-2020-14058, CVE-2020-15049, CVE-2020-24606, CVE-2020-8449, CVE-2020-8450
SHA-256 | 6a36bcffb87c3fe39872c03d6a9977d9fae1e90b42488ae64fd7e983caa0c436
Red Hat Security Advisory 2020-4082-01
Posted Sep 30, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-4082-01 - Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects. Issues addressed include HTTP request smuggling, buffer overflow, denial of service, and information leakage vulnerabilities.

tags | advisory, web, denial of service, overflow, vulnerability
systems | linux, redhat
advisories | CVE-2019-12528, CVE-2020-15049, CVE-2020-15810, CVE-2020-15811, CVE-2020-24606, CVE-2020-8449, CVE-2020-8450
SHA-256 | ac5f5be72f882c9207020a5a07bfe8f72ffe10b798001249d9950ce8b30580f7
Ubuntu Security Notice USN-4551-1
Posted Sep 28, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4551-1 - Alex Rousskov and Amit Klein discovered that Squid incorrectly handled certain Content-Length headers. A remote attacker could possibly use this issue to perform an HTTP request smuggling attack, resulting in cache poisoning. Amit Klein discovered that Squid incorrectly validated certain data. A remote attacker could possibly use this issue to perform an HTTP request smuggling attack, resulting in cache poisoning. Various other issues were also addressed.

tags | advisory, remote, web
systems | linux, ubuntu
advisories | CVE-2020-15049, CVE-2020-15810, CVE-2020-15811, CVE-2020-24606
SHA-256 | 9e92ebd0c9f2c2349eaed8ad48b4f324787d866a46db0c2c35da9b6a79c5a38f
Ubuntu Security Notice USN-4477-1
Posted Aug 27, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4477-1 - Amit Klein discovered that Squid incorrectly validated certain data. A remote attacker could possibly use this issue to perform an HTTP request smuggling attack, resulting in cache poisoning. RĂ©gis Leroy discovered that Squid incorrectly validated certain data. A remote attacker could possibly use this issue to perform an HTTP request splitting attack, resulting in cache poisoning. Lubos Uhliarik discovered that Squid incorrectly handled certain Cache Digest response messages sent by trusted peers. A remote attacker could possibly use this issue to cause Squid to consume resources, resulting in a denial of service. Various other issues were also addressed.

tags | advisory, remote, web, denial of service
systems | linux, ubuntu
advisories | CVE-2020-15810, CVE-2020-15811, CVE-2020-24606
SHA-256 | e30d35415018b5770194d1b9730378b888542946cf0e323dd1be4b7182755fd8
Debian Security Advisory 4751-1
Posted Aug 27, 2020
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4751-1 - Several vulnerabilities were discovered in Squid, a fully featured web proxy cache, which could result in request splitting, request smuggling (leading to cache poisoning) and denial of service when processing crafted cache digest responses messages.

tags | advisory, web, denial of service, vulnerability
systems | linux, debian
advisories | CVE-2020-15810, CVE-2020-15811, CVE-2020-24606
SHA-256 | 3753426127834c4951d974e752f420e15ee85396cc43dfb685e0906f69a54744
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