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Vulnerability Details : CVE-2020-24606

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.
Publish Date : 2020-08-24 Last Update Date : 2021-07-21
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- CVSS Scores & Vulnerability Types

CVSS Score
7.1
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID 20

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2020:4082: squid security update (Important) oval:com.redhat.rhsa:def:20204082 unix
RHSA-2020:4743: squid:4 security, bug fix, and enhancement update (Moderate) oval:com.redhat.rhsa:def:20204743 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2020-24606

# Product Type Vendor Product Version Update Edition Language
1 OS Canonical Ubuntu Linux 16.04 * * * Version Details Vulnerabilities
2 OS Canonical Ubuntu Linux 18.04 * * * Version Details Vulnerabilities
3 OS Canonical Ubuntu Linux 20.04 * * * Version Details Vulnerabilities
4 OS Debian Debian Linux 9.0 * * * Version Details Vulnerabilities
5 OS Debian Debian Linux 10.0 * * * Version Details Vulnerabilities
6 OS Fedoraproject Fedora 31 * * * Version Details Vulnerabilities
7 OS Fedoraproject Fedora 32 * * * Version Details Vulnerabilities
8 OS Fedoraproject Fedora 33 * * * Version Details Vulnerabilities
9 OS Opensuse Leap 15.1 * * * Version Details Vulnerabilities
10 OS Opensuse Leap 15.2 * * * Version Details Vulnerabilities
11 Application Squid-cache Squid * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Canonical Ubuntu Linux 3
Debian Debian Linux 2
Fedoraproject Fedora 3
Opensuse Leap 2
Squid-cache Squid 1

- References For CVE-2020-24606

https://security.netapp.com/advisory/ntap-20210226-0006/ CONFIRM
https://security.netapp.com/advisory/ntap-20210226-0007/ CONFIRM
https://usn.ubuntu.com/4551-1/
UBUNTU USN-4551-1
https://lists.debian.org/debian-lts-announce/2020/10/msg00005.html
MLIST [debian-lts-announce] 20201002 [SECURITY] [DLA 2394-1] squid3 security update
https://security.netapp.com/advisory/ntap-20210219-0007/ CONFIRM
https://lists.fedoraproject.org/archives/list/[email protected]/message/BE6FKUN7IGTIR2MEEMWYDT7N5EJJLZI2/
FEDORA FEDORA-2020-6c58bff862
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00017.html
SUSE openSUSE-SU-2020:1369
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00012.html
SUSE openSUSE-SU-2020:1346
https://www.debian.org/security/2020/dsa-4751
DEBIAN DSA-4751
https://usn.ubuntu.com/4477-1/
UBUNTU USN-4477-1
https://lists.fedoraproject.org/archives/list/[email protected]/message/HJJDI7JQFGQLVNCKMVY64LAFMKERAOK7/
FEDORA FEDORA-2020-73af8655eb
https://lists.fedoraproject.org/archives/list/[email protected]/message/BMTFLVB7GLRF2CKGFPZ4G4R5DIIPHWI3/
FEDORA FEDORA-2020-63f3bd656e
http://www.squid-cache.org/Versions/v4/changesets/SQUID-2020_9.patch
https://github.com/squid-cache/squid/security/advisories/GHSA-vvj7-xjgq-g2jg

- Metasploit Modules Related To CVE-2020-24606

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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