MapServer is a system for developing web-based GIS applications. Starting in version 4.2 and prior to version 8.6.1, a heap-buffer-overflow write in MapServer’s SLD (Styled Layer Descriptor) parser lets a remote, unauthenticated attacker crash the MapServer process by sending a crafted SLD with more than 100 Threshold elements inside a ColorMap/Categorize structure (commonly reachable via WMS GetMap with SLDBODY). Version 8.6.1 patches the issue.

MapServer is a system for developing web-based GIS applications. From 6.4.0 to before 8.6.3, msSLDParseUserStyle always calls SLDApplyRuleValues(psRule, psLayer, 1); for any <Rule> carrying <ElseFilter/> — it assumes msSLDParseRule added one class. When the rule has no symbolizer (a structurally valid SLD), msSLDParseRule adds zero, and SLDApplyRuleValues ends up indexing class[-1], resulting in a NULL pointer dereference. A 200-byte well-formed SLD via the WMS SLDBODY= parameter is enough to trigger this, no auth required. This vulnerability is fixed in 8.6.3.

MapServer is a system for developing web-based GIS applications. From version 6.0 to before version 8.6.2, a reflected XSS vulnerability in MapServer's WMS server allows an unauthenticated attacker to inject arbitrary HTML/JavaScript into the browser of any user who opens a crafted WMS URL. The vulnerability is triggered via FORMAT=application/openlayers combined with an unsanitized SRS parameter in WMS 1.3.0 requests. This issue has been patched in version 8.6.2.

MapServer upstream during a security audit of MapServer v5.6 source code found a potential buffer overflow in the way MapServer generated unique temporary filenames. A local attacker could use this flaw to conduct denial of service attacks.

References: [1] http://trac.osgeo.org/mapserver/ticket/3484

Upstream patch (against 5-4 SVN branch): [2] http://trac.osgeo.org/mapserver/changeset/10310

Upstream patch (against trunk): [3] http://trac.osgeo.org/mapserver/changeset/10318

Multiple SQL injection flaws and one stack based buffer overflow flaw were found in MapServer: [1] http://lists.osgeo.org/pipermail/mapserver-users/2011-July/069430.html

More from [1]:

MapServer developers have discovered flaws in the OGC filter support in MapServer. That code is used in support of WFS, WMS-SLD and SOS specifications.

All versions may be susceptible to SQL injection under certain circumstances. The extent of the vulnerability depends on the MapServer version, relational database and mapfile configuration being used. All users are strongly encouraged to upgrade to these latest releases.

The 5.6.7 and 4.10.7 releases also address one significant potentially exploitable buffer overflow (6.0 branch is not vulneralble).

References: [1] http://lists.osgeo.org/pipermail/mapserver-users/2011-July/069430.html [2] http://trac.osgeo.org/mapserver/ticket/3903 [3] https://bugzilla.redhat.com/showbug.cgi?id=722545 [4] http://www.openwall.com/lists/oss-security/2011/07/19/11 (CVE Request)

Relevant upstream patches: [5] http://trac.osgeo.org/mapserver/attachment/ticket/3903/ticket39036.0.x.patch (for 6.0.x branch) [6] http://trac.osgeo.org/mapserver/attachment/ticket/3903/ticket39035.6.x.patch (for 5.6.x branch) [7] http://trac.osgeo.org/mapserver/attachment/ticket/3903/ticket39035.4.x.patch (for 5.4.x branch) [8] http://trac.osgeo.org/mapserver/attachment/ticket/3903/ticket39035.2.x.patch (for 5.2.x branch) [9] http://trac.osgeo.org/mapserver/attachment/ticket/3903/ticket39035.0.x.patch (for 5.0.x branch) [10] http://trac.osgeo.org/mapserver/attachment/ticket/3903/ticket39034.10.x.patch (for 4.10.x branch)