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Vulnerability of Apache Subversion: integer overflow of svn_error_create

Synthesis of the vulnerability 

An attacker can generate an integer overflow in the svn_error_create() function of Apache Subversion, in order to trigger a denial of service, and possibly to run code.
Vulnerable systems: Subversion, Fedora.
Severity of this threat: 3/4.
Creation date: 16/12/2015.
Références of this weakness: CVE-2015-5259, FEDORA-2015-6efa349a85, FEDORA-2015-afdb0e8aaa, VIGILANCE-VUL-18536.

Description of the vulnerability 

The Apache Subversion product uses uris of the "svn://" family.

When this uri contains an error, the svn_error_create() function creates a message. However, if the size indicated for this uri is too large, an integer overflows, then the size verification is bypassed. Data from the uri thus overwrites the end of the buffer containing the error message.

An attacker can therefore generate an integer overflow in the svn_error_create() function of Apache Subversion, in order to trigger a denial of service, and possibly to run code.
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This cybersecurity note impacts software or systems such as Subversion, Fedora.

Our Vigil@nce team determined that the severity of this computer weakness announce is important.

The trust level is of type confirmed by the editor, with an origin of intranet client.

An attacker with a expert ability can exploit this cybersecurity vulnerability.

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: patch for svn_error_create.
A patch is indicated in information sources.

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
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