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OpenAdvisories
Unscored USN-4446-1 4 CVEs

squid3 vulnerabilities

Published Aug 3, 2020 · Updated Feb 10, 2026

Summary

Jeriko One discovered that Squid incorrectly handled caching certain
requests. A remote attacker could possibly use this issue to perform
cache-injection attacks or gain access to reverse proxy features such as
ESI. (CVE-2019-12520)

Jeriko One and Kristoffer Danielsson discovered that Squid incorrectly
handled certain URN requests. A remote attacker could possibly use this
issue to bypass access checks. (CVE-2019-12523)

Jeriko One discovered that Squid incorrectly handled URL decoding. A remote
attacker could possibly use this issue to bypass certain rule checks.
(CVE-2019-12524)

Jeriko One and Kristoffer Danielsson discovered that Squid incorrectly
handled input validation. A remote attacker could use this issue to cause
Squid to crash, resulting in a denial of service. (CVE-2019-18676)

Fixed packages 2

ReleasePackageFixed in
Ubuntu · 16.04 LTS 16.04:LTS squid3 3.5.12-1ubuntu7.12
Ubuntu · 18.04 LTS 18.04:LTS squid3 3.5.27-1ubuntu1.7

Vulnerabilities 4

References

  • report
    https://ubuntu.com/security/CVE-2019-12520
  • report
    https://ubuntu.com/security/CVE-2019-12523
  • report
    https://ubuntu.com/security/CVE-2019-12524
  • report
    https://ubuntu.com/security/CVE-2019-18676