CVE-2020-24606

Description

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.

Category

8.6
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 8.09% Top 10%
Vendor Advisory debian.org Vendor Advisory ubuntu.com Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory fedoraproject.org Vendor Advisory ubuntu.com Vendor Advisory squid-cache.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/squid-cache/squid/security/advisories/GHSA-vvj7-xjgq-g2jg third party advisory
http://www.squid-cache.org/Versions/v4/changesets/SQUID-2020_9.patch patch vendor advisory
https://www.debian.org/security/2020/dsa-4751 third party advisory vendor advisory
https://usn.ubuntu.com/4477-1/ third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HJJDI7JQFGQLVNCKMVY64LAFMKERAOK7/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BMTFLVB7GLRF2CKGFPZ4G4R5DIIPHWI3/ vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00012.html vendor advisory mailing list third party advisory
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00017.html vendor advisory mailing list third party advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BE6FKUN7IGTIR2MEEMWYDT7N5EJJLZI2/ vendor advisory
https://usn.ubuntu.com/4551-1/ third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2020/10/msg00005.html third party advisory mailing list
https://security.netapp.com/advisory/ntap-20210219-0007/ third party advisory
https://security.netapp.com/advisory/ntap-20210226-0007/ broken link
https://security.netapp.com/advisory/ntap-20210226-0006/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2020-24606?
CVE-2020-24606 has been scored as a high severity vulnerability.
How to fix CVE-2020-24606?
To fix CVE-2020-24606, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-24606 being actively exploited in the wild?
It is possible that CVE-2020-24606 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~8% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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