HTTP Request Smuggling Vulnerability in Squid Cache Server
CVE-2020-15049

9.9CRITICAL

Key Information:

Vendor

Squid-cache

Status
Squid
Vendor
CVE Published:
30 June 2020

What is CVE-2020-15049?

A vulnerability in the Squid cache server prior to version 4.12 and 5.0.3 allows attackers to conduct Request Smuggling and Poisoning attacks. This can occur when a client submits an HTTP request with a Content-Length header that has unusual formatting, such as a leading '+' or '-' character, or an uncommon whitespace character preceding the length value. This exploitation can compromise the integrity of the HTTP cache, resulting in unintended behavior and potential data leakage.

References

http://www.squid-cache.org/Versions/v4/changesets/squid-4...
x_refsource_MISC
http://www.squid-cache.org/Versions/v5/changesets/squid-5...
x_refsource_MISC
https://github.com/squid-cache/squid/security/advisories/...
x_refsource_CONFIRM

EPSS Score

15% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.