UpHeron
All vulnerabilities

Servers and applications

CVE-2016-2390

The FwdState::connectedToPeer method in FwdState.cc in Squid before 3.5.14 and 4.0.x before 4.0.6 does not properly handle SSL handshake errors when built with the --with-openssl option, which allows remote attackers to cause a denial of service (application crash) via a plaintext HTTP message.

Severity
Medium 5.9
Published
19 Apr 2016
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
26% in the next 30 daysHigher than 97% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
Improper input validation (CWE-20)
Attack
Over the network · Only under certain conditions · No login needed · No user action needed
Attacker can
Take it down
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Sources
NVD

Affected software

SoftwareAffected versions
SquidServers and applications · cpe:a:squid-cache:squid
  • Every version up to 3.5.13
  • Version 4.0.4
  • Version 4.0.5

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2016-2390
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2016-2390