Is CVE-2020-15049 in the CISA KEV catalog?

No. CVE-2020-15049 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-15049?

CVE-2020-15049 has a CVSS v3 base score of 9.9 (CRITICAL).

What is the EPSS score for CVE-2020-15049?

CVE-2020-15049 has an EPSS score of 5.71% (92th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-15049?

Upgrade squid on debian 11 to 4.12-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2020-15049

CRITICALEPSS 92th pctl

9.9

CVSS v3

NVD

Description

An issue was discovered in http/ContentLengthInterpreter.cc in Squid before 4.12 and 5.x before 5.0.3. A Request Smuggling and Poisoning attack can succeed against the HTTP cache. The client sends an HTTP request with a Content-Length header containing "+\ "-" or an uncommon shell whitespace character prefix to the length field-value.

CWE-444

How to fix

Remediation Available

squidDebian

Fixed in:4.12-1CVE-2020-15049

squidUbuntu

Fixed in:3.5.12-1ubuntu7.16USN-4895-1

Fixed in:3.5.12-1ubuntu7.15USN-4551-1

Fixed in:3.5.27-1ubuntu1.10USN-4895-1

Fixed in:3.5.27-1ubuntu1.9USN-4551-1

Fixed in:4.10-1ubuntu1.3USN-4895-1

squid3Ubuntu

Fixed in:3.5.12-1ubuntu7.16USN-4895-1

Fixed in:3.5.12-1ubuntu7.15USN-4551-1

Fixed in:3.5.27-1ubuntu1.10USN-4895-1

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 RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

5.71%probability of exploitation in 30 days

92ndpercentile

High risk: more likely to be exploited than 92% of all known CVEs.

References

Patch2

Third-Party Advisory1

github.com

Other references7

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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.