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Vulnerability of Apache Subversion: buffer overflow of mod_dav_svn

Synthesis of the vulnerability 

An authenticated attacker can generate a buffer overflow in the mod_dav_svn module of Apache Subversion, in order to trigger a denial of service, and possibly to run code.
Impacted products: Subversion, Debian, Fedora, openSUSE, openSUSE Leap, Slackware, SUSE Linux Enterprise Desktop, SLES.
Severity of this bulletin: 2/4.
Creation date: 16/12/2015.
Références of this threat: CVE-2015-5343, DSA-3424-1, FEDORA-2015-6efa349a85, FEDORA-2015-afdb0e8aaa, openSUSE-SU-2015:2362-1, openSUSE-SU-2015:2363-1, SSA:2016-097-01, SUSE-SU-2017:2200-1, VIGILANCE-VUL-18537.

Description of the vulnerability 

The Apache Subversion product uses the mod_dav_svn module to be accessed with a web client.

However, an attacker with a write access can send a query too large. An overflow thus occurs in the subversion/mod_dav_svn/util.c file.

An authenticated attacker can therefore generate a buffer overflow in the mod_dav_svn module of Apache Subversion, in order to trigger a denial of service, and possibly to run code.
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This cybersecurity alert impacts software or systems such as Subversion, Debian, Fedora, openSUSE, openSUSE Leap, Slackware, SUSE Linux Enterprise Desktop, SLES.

Our Vigil@nce team determined that the severity of this weakness is medium.

The trust level is of type confirmed by the editor, with an origin of user account.

An attacker with a expert ability can exploit this security weakness.

Solutions for this threat 

Apache Subversion: version 1.9.3.
The version 1.9.3 is fixed:
  http://subversion.apache.org/download/#recommended-release

Apache Subversion: version 1.8.15.
The version 1.8.15 is fixed:
  http://subversion.apache.org/download/#supported-releases

Apache Subversion: patch for mod_dav_svn.
A patch is indicated in information sources.

Debian: new subversion packages.
New packages are available:
  Debian 8: subversion 1.8.10-6+deb8u2

Fedora 22: new subversion packages.
New packages are available:
  Fedora 22: subversion 1.8.15-1.fc22

Fedora 23: new subversion packages.
New packages are available:
  Fedora 23: subversion 1.9.3-1.fc23

openSUSE Leap 42.1: new subversion packages.
New packages are available:
  openSUSE Leap 42.1: subversion 1.8.10-6.1

openSUSE: new subversion packages.
New packages are available:
  openSUSE 13.1: subversion 1.8.15-2.42.1
  openSUSE 13.2: subversion 1.8.15-2.23.1

Slackware: new subversion packages.
New packages are available:
  Slackware 14.0: subversion 1.7.22-*-1_slack14.0
  Slackware 14.1: subversion 1.7.22-*-1_slack14.1

SUSE LE 12: new subversion packages.
New packages are available:
  SUSE LE 12 SP2: subversion 1.8.19-25.3.1
  SUSE LE 12 SP3: subversion 1.8.19-25.3.1
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Vigil@nce provides an applications vulnerabilities alert. The Vigil@nce security watch publishes vulnerability bulletins about threats impacting the information system.