Bug 38207

Summary:	xerces-c: Denial of service (4.1)
Product:	UCS	Reporter:	Arvid Requate <requate>
Component:	Security updates	Assignee:	Janek Walkenhorst <walkenhorst>
Status:	CLOSED FIXED	QA Contact:	Arvid Requate <requate>
Severity:	normal
Priority:	P2	CC:	gohmann
Version:	UCS 4.1	Flags:	requate: Patch_Available+
Target Milestone:	UCS 4.1-3-errata
Hardware:	Other
OS:	Linux
What kind of report is it?:	Security Issue	What type of bug is this?:	---
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User Pain:		Enterprise Customer affected?:
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Description Arvid Requate

2015-04-07 14:43:12 CEST

Denial of service in internal/XMLReader.cpp via crafted XML data (CVE-2015-0252)

Comment 1 Arvid Requate

2015-05-06 16:42:21 CEST

Fixed in upstream Debian package version 3.1.1-3+deb7u1

Comment 2 Arvid Requate

2016-02-29 16:55:27 CET

Fixed in upstream Debian package version 3.1.1-3+deb7u2:

* Apache Xerces-C XML Parser Crashes on Malformed Input (CVE-2016-0729)

Comment 3 Arvid Requate

2016-05-23 15:10:57 CEST

Fixed in upstream Debian package version 3.1.1-3+deb7u3:

* Use-after-free vulnerability in validators/DTD/DTDScanner.cpp in Apache Xerces C++ 3.1.3 and earlier does not properly handle exceptions raised in the XMLReader class, which allows context-dependent attackers to have unspecified impact via an invalid character in an XML document. (CVE-2016-2099)

Comment 4 Janek Walkenhorst

2016-07-01 18:53:48 CEST

Package        : xerces-c
Version        : 3.1.1-3+deb7u4
CVE ID         : CVE-2016-4463
Debian Bug     : 828990

Brandon Perry discovered that xerces-c, a validating XML parser library
for C++, fails to successfully parse a DTD that is deeply nested,
causing a stack overflow. A remote unauthenticated attacker can take
advantage of this flaw to cause a denial of service against applications
using the xerces-c library.

Additionally this update includes an enhancement to enable applications
to fully disable DTD processing through the use of an environment
variable (XERCES_DISABLE_DTD).

For Debian 7 "Wheezy", these problems have been fixed in version
3.1.1-3+deb7u4.

Comment 5 Janek Walkenhorst

2016-08-26 13:04:45 CEST

Tests (i386): OK
Advisory: xerces-c.yaml

Comment 6 Arvid Requate

2016-09-05 18:03:15 CEST

Verified:
* 3.1.1-3+deb7u4 imported and built
* No UCS patches
* Package update Ok (amd64) (tested with open-vm-tools)
* Advisory Ok

Comment 7 Janek Walkenhorst

2016-09-07 18:41:36 CEST

<http://errata.software-univention.de/ucs/4.1/242.html>