Is CVE-2020-8449 in the CISA KEV catalog?

No. CVE-2020-8449 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-8449?

CVE-2020-8449 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2020-8449?

CVE-2020-8449 has an EPSS score of 8.31% (94th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-8449?

Upgrade squid on debian 11 to 4.10-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2020-8449

HIGHEPSS 94th pctl

7.5

CVSS v3

NVD

Description

An issue was discovered in Squid before 4.10. Due to incorrect input validation, it can interpret crafted HTTP requests in unexpected ways to access server resources prohibited by earlier security filters.

CWE-668

How to fix

Remediation Available

squidDebian

Fixed in:4.10-1CVE-2020-8449

squidUbuntu

Fixed in:3.5.12-1ubuntu7.10USN-4289-1

Fixed in:3.5.27-1ubuntu1.5USN-4289-1

squid3Ubuntu

Fixed in:3.5.12-1ubuntu7.10USN-4289-1

Fixed in:3.5.27-1ubuntu1.5USN-4289-1

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

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

8.31%probability of exploitation in 30 days

94thpercentile

High risk: more likely to be exploited than 94% of all known CVEs.

References

Patch6

Third-Party Advisory7

Other references2

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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.