Bug 1308865 (CVE-2016-2390) - CVE-2016-2390 squid: incorrect server error handling resulting in denial of service
Summary: CVE-2016-2390 squid: incorrect server error handling resulting in denial of s...
Alias: CVE-2016-2390
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1308866
Blocks: 1308870
TreeView+ depends on / blocked
Reported: 2016-02-16 10:26 UTC by Andrej Nemec
Modified: 2019-10-10 11:13 UTC (History)
7 users (show)

Fixed In Version: squid 3.5.14, squid 4.0.6
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2016-04-05 08:44:44 UTC

Attachments (Terms of Use)

Description Andrej Nemec 2016-02-16 10:26:57 UTC
Due to incorrectly handling server errors Squid is vulnerable to
a denial of service attack when connecting to TLS or SSL servers.
This problem allows any trusted client to perform a denial of
service attack on the Squid service regardless of whether TLS or
SSL is configured for use in the proxy.

Upstream advisory:


CVE request:


Comment 1 Andrej Nemec 2016-02-16 10:27:20 UTC
Created squid tracking bugs for this issue:

Affects: fedora-all [bug 1308866]

Comment 2 Andrej Nemec 2016-02-16 15:18:56 UTC
CVE assignment:


Comment 3 Luboš Uhliarik ✈ 2016-03-01 12:52:38 UTC
Fix committed to F24 and RAWHIDE.

Comment 7 Cedric Buissart 🐶 2016-04-05 08:43:38 UTC

This issue did not affect the versions of squid as shipped with Red Hat Enterprise Linux versions 5, 6 and 7, as they are not shipped with a vulnerable version of squid, and no currently backported patch would introduce the bug.

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