CVE & CISA-KEV Catalog

CVE-2020-24606

HIGHEPSS 91th pctl
8.6
CVSS v3
NVD

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.

CWE-667

How to fix

Remediation Available
squidDebian
Fixed in:4.13-1CVE-2020-24606
Fixed in:4.13-1CVE-2020-24606
Fixed in:4.13-1CVE-2020-24606
Fixed in:4.13-1CVE-2020-24606
squidUbuntu
Fixed in:3.5.12-1ubuntu7.15USN-4551-1
Fixed in:3.5.27-1ubuntu1.9USN-4551-1
Fixed in:4.10-1ubuntu1.2USN-4477-1
squid3Ubuntu
Fixed in:3.5.12-1ubuntu7.15USN-4551-1
Fixed in:3.5.27-1ubuntu1.9USN-4551-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeChanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Exploit Intelligence

5.16%probability of exploitation in 30 days
91stpercentile

High risk: more likely to be exploited than 91% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.