Bug 40834 - squid3: Denial of service (4.1)
Summary: squid3: Denial of service (4.1)
Status: CLOSED FIXED
Alias: None
Product: UCS
Classification: Unclassified
Component: Security updates
Version: UCS 4.1
Hardware: Other Linux
: P4 normal
Target Milestone: UCS 4.1-4-errata
Assignee: Arvid Requate
QA Contact: Daniel Tröder
URL:
Keywords:
Depends on:
Blocks: 42563 43408
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Reported: 2016-03-04 09:24 CET by Arvid Requate
Modified: 2017-01-24 15:41 CET (History)
2 users (show)

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Description Arvid Requate univentionstaff 2016-03-04 09:24:23 CET 
The Edge Side Includes (ESI) parser in Squid 3.x before 3.5.15 and 4.x before 4.0.7 does not check buffer limits during XML parsing, which allows remote HTTP servers to cause a denial of service (assertion failure and daemon exit) via a crafted XML document, related to esi/CustomParser.cc and esi/CustomParser.h (CVE-2016-2570)
Comment 1 Arvid Requate univentionstaff 2016-03-21 13:01:53 CET 
Upstream Debian package version 3.1.20-2.2+deb7u4 fixes this issue:

* http.cc in Squid 3.x before 3.5.15 and 4.x before 4.0.7 proceeds with the storage of certain data after a response-parsing failure, which allows remote HTTP servers to cause a denial of service (assertion failure and daemon exit) via a malformed response. (CVE-2016-2571)
Comment 2 Arvid Requate univentionstaff 2016-05-18 14:19:02 CEST 
Upstream Debian package version 3.1.20-2.2+deb7u5 fixes these issues:

* CVE-2016-4051: Buffer overflow in cachemgr.cgi.
* CVE-2016-4052: Multiple stack-based buffer overflows by wrongly
  handling Edge Side Includes (ESI) responses.
* CVE-2016-4053: Public information disclosure of the server stack
  layout when processing ESI responses.
* CVE-2016-4054: Remote code execution when processing ESI responses.
* CVE-2016-4554: Header Smuggling issue in HTTP Request processing.
* CVE-2016-4555 and CVE-2016-4556: Denial of Service when processing
Comment 3 Arvid Requate univentionstaff 2016-11-10 21:21:10 CET 
Advisory: squid3.yaml
Comment 4 Daniel Tröder univentionstaff 2016-11-28 11:10:15 CET 
OK: DEBIAN_FRONTEND=noninteractive apt-get install --reinstall squid3
OK: automatic tests: ucs-test -E dangerous -s proxy
OK: advisory
Comment 5 Janek Walkenhorst univentionstaff 2016-12-01 11:57:24 CET 
<http://errata.software-univention.de/ucs/4.1/346.html>