The mod_dav_svn Apache HTTPD server module in Subversion 1.7.0 through 1.7.8 allows remote attackers to cause a denial of service (segmentation fault and crash) via a log REPORT request with an invalid limit, which triggers an access of an uninitialized variable.

Subversion received minor version updates to fix remote triggerable vulnerabilities in mod_dav_svn which may result in denial of service.

On openSUSE 12.1 :

  - update to 1.6.21 [bnc#813913], addressing remotely     triggerable 

  + CVE-2013-1845: mod_dav_svn excessive memory usage from     property changes

  + CVE-2013-1846: mod_dav_svn crashes on LOCK requests     against activity URLs

  + CVE-2013-1847: mod_dav_svn crashes on LOCK requests     against non-existent URLs

  + CVE-2013-1849: mod_dav_svn crashes on PROPFIND requests     against activity URLs

  - further changes :

  + mod_dav_svn will omit some property values for activity     urls

  + improve memory usage when committing properties in     mod_dav_svn

  + fix mod_dav_svn runs pre-revprop-change twice

  + fixed: post-revprop-change errors cancel commit

  + improved logic in mod_dav_svn's implementation of lock.

  + fix a compatibility issue with g++ 4.7

On openSUSE 12.2 and 12.3 :

  - update to 1.7.9 [bnc#813913], addressing remotely     triggerable vulnerabilities in mod_dav_svn which may     result in denial of service :

  + CVE-2013-1845: mod_dav_svn excessive memory usage from     property changes

  + CVE-2013-1846: mod_dav_svn crashes on LOCK requests     against activity URLs

  + CVE-2013-1847: mod_dav_svn crashes on LOCK requests     against non-existent URLs

  + CVE-2013-1849: mod_dav_svn crashes on PROPFIND requests     against activity URLs

  + CVE-2013-1884: mod_dav_svn crashes on out of range limit     in log REPORT

  - further changes :

  + Client-side bugfixes :

  - improved error messages about svn:date and svn:author     props.

  - fix local_relpath assertion

  - fix memory leak in `svn log` over svn://

  - fix incorrect authz failure when using neon http library

  - fix segfault when using kwallet

  + Server-side bugfixes :

  - svnserve will log the replayed rev not the low-water     rev.

  - mod_dav_svn will omit some property values for activity     urls

  - fix an assertion in mod_dav_svn when acting as a proxy     on /

  - improve memory usage when committing properties in     mod_dav_svn

  - fix svnrdump to load dump files with non-LF line endings

  - fix assertion when rep-cache is inaccessible

  - improved logic in mod_dav_svn's implementation of lock.

  - avoid executing unnecessary code in log with limit

  - Developer-visible changes :

  + General :

  - fix an assertion in dav_svn_get_repos_path() on Windows

  - fix get-deps.sh to correctly download zlib

  - doxygen docs will now ignore prefixes when producing the     index

  - fix get-deps.sh on freebsd

  + Bindings :

  - javahl status api now respects the ignoreExternals     boolean

  - refresh subversion-no-build-date.patch for upstream     source changes

The remote host is affected by the vulnerability described in GLSA-201309-11 (Subversion: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Subversion. Please       review the CVE identifiers referenced below for details.
  Impact :

    A remote attacker could cause a Denial of Service condition or obtain       sensitive information. A local attacker could escalate his privileges to       the user running svnserve.
  Workaround :

    There is no known workaround at this time.

The remote host is running an Apache Subversion Server server. Versions before 1.6.21, or 1.7.x before 1.7.9  are vulnerable to the following vulnerabilities in the mod_dav_svn Apache HTTPD server module :

  - A flaw exists in the 'mod_dav_svn' that is triggered when handling node properties. (CVE-2013-1845)

  - A NULL pointer dereference exists in the 'mod_dav_svn' module, triggered during the handling of a crafted Log REPORT request, URL lock request, LOCK request against non-existent URL, and URL PROPFIND request. (CVE-2013-1846, CVE-2013-1847, CVE-2013-1849)

  - A NULL pointer dereference exists in the 'mod_dav_svn' module, triggered during the handling of a crafted Log REPORT request.  This flaw reportedly affects Apache Subversion 1.7.x only.  (CVE-2013-1884).

Versions of Apache Subversion prior to 1.6.21, or 1.7.x prior to 1.7.9  are vulnerable to the following vulnerabilities in the 'mod_dav_svn' Apache HTTPD server module :

  - A flaw exists in the 'mod_dav_svn' that is triggered when handling node properties. (CVE-2013-1845)
 - A NULL pointer dereference exists in the 'mod_dav_svn' module, triggered during the handling of a crafted Log REPORT request, URL lock request, LOCK request against non-existent URL, and URL PROPFIND request. (CVE-2013-1846, CVE-2013-1847, CVE-2013-1849)
 - A NULL pointer dereference exists in the 'mod_dav_svn' module, triggered during the handling of a crafted Log REPORT request.  This flaw reportedly affects Apache Subversion 1.7.x only.  (CVE-2013-1884). 

Alexander Klink discovered that the Subversion mod_dav_svn module for Apache did not properly handle a large number of properties. A remote authenticated attacker could use this flaw to cause memory consumption, leading to a denial of service. (CVE-2013-1845)

Ben Reser discovered that the Subversion mod_dav_svn module for Apache did not properly handle certain LOCKs. A remote authenticated attacker could use this flaw to cause Subversion to crash, leading to a denial of service. (CVE-2013-1846)

Philip Martin and Ben Reser discovered that the Subversion mod_dav_svn module for Apache did not properly handle certain LOCKs. A remote attacker could use this flaw to cause Subversion to crash, leading to a denial of service. (CVE-2013-1847)

It was discovered that the Subversion mod_dav_svn module for Apache did not properly handle certain PROPFIND requests. A remote attacker could use this flaw to cause Subversion to crash, leading to a denial of service. (CVE-2013-1849)

Greg McMullin, Stefan Fuhrmann, Philip Martin, and Ben Reser discovered that the Subversion mod_dav_svn module for Apache did not properly handle certain log REPORT requests. A remote attacker could use this flaw to cause Subversion to crash, leading to a denial of service. This issue only affected Ubuntu 12.10 and Ubuntu 13.04.
(CVE-2013-1884)

Stefan Sperling discovered that Subversion incorrectly handled newline characters in filenames. A remote authenticated attacker could use this flaw to corrupt FSFS repositories. (CVE-2013-1968)

Boris Lytochkin discovered that Subversion incorrectly handled TCP connections that were closed early. A remote attacker could use this flaw to cause Subversion to crash, leading to a denial of service.
(CVE-2013-2112).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The version of Apache Subversion Server installed on the remote host is prior to 1.6.21 or 1.7.x prior to 1.7.9. It is, therefore, affected by multiple denial of service (DoS) vulnerabilities in the 'mod_dav_svn' Apache HTTPD server module :

  - A flaw exists in 'mod_dav_svn' that is triggered when     handling node properties. (CVE-2013-1845)

  - A NULL pointer dereference exists in the 'mod_dav_svn'     module, triggered during the handling of a crafted Log     REPORT request, URL lock request, LOCK request against     non-existent URL, or URL PROPFIND request.
    (CVE-2013-1846, CVE-2013-1847, CVE-2013-1849)

  - A NULL pointer dereference exists in the 'mod_dav_svn'     module, triggered during the handling of a crafted Log     REPORT request. This flaw reportedly affects Apache     Subversion 1.7.x only.  (CVE-2013-1884)

Multiple vulnerabilities has been found and corrected in subversion :

Subversion's mod_dav_svn Apache HTTPD server module will use excessive amounts of memory when a large number of properties are set or deleted on a node. This can lead to a DoS. There are no known instances of this problem being observed in the wild (CVE-2013-1845).

Subversion's mod_dav_svn Apache HTTPD server module will crash when a LOCK request is made against activity URLs. This can lead to a DoS.
There are no known instances of this problem being observed in the wild (CVE-2013-1846).

Subversion's mod_dav_svn Apache HTTPD server module will crash in some circumstances when a LOCK request is made against a non-existent URL.
This can lead to a DoS. There are no known instances of this problem being observed in the wild (CVE-2013-1847).

Subversion's mod_dav_svn Apache HTTPD server module will crash when a PROPFIND request is made against activity URLs. This can lead to a DoS. There are no known instances of this problem being observed in the wild, but the details of how to exploit it have been disclosed on the full disclosure mailing list (CVE-2013-1849).

Subversion's mod_dav_svn Apache HTTPD server module will crash when a log REPORT request receives a limit that is out of the allowed range.
This can lead to a DoS. There are no known instances of this problem being used as a DoS in the wild (CVE-2013-1884).

The updated packages have been upgraded to the 1.7.9 version which is not affected by these issues.

New subversion packages are available for Slackware 13.0, 13.1, 13.37, 14.0, and -current to fix security issues.

Subversion team reports :

Subversion's mod_dav_svn Apache HTTPD server module will use excessive amounts of memory when a large number of properties are set or deleted on a node.

Subversion's mod_dav_svn Apache HTTPD server module will crash when a LOCK request is made against activity URLs.

Subversion's mod_dav_svn Apache HTTPD server module will crash in some circumstances when a LOCK request is made against a non-existent URL.

Subversion's mod_dav_svn Apache HTTPD server module will crash when a PROPFIND request is made against activity URLs.

Subversion's mod_dav_svn Apache HTTPD server module will crash when a log REPORT request receives a limit that is out of the allowed range.

ID	Name	Product	Family	Severity
74976	openSUSE Security Update : subversion (openSUSE-SU-2013:0687-1)	Nessus	SuSE Local Security Checks	medium
70084	GLSA-201309-11 : Subversion: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	high
801403	Apache Subversion < 1.6.21 / 1.7.x < 1.7.9 Multiple DoS	Log Correlation Engine	Web Servers	medium
6943	Apache Subversion < 1.6.21 / 1.7.x < 1.7.9 Multiple DoS	Nessus Network Monitor	Web Servers	medium
67016	Ubuntu 12.04 LTS / 12.10 / 13.04 : subversion vulnerabilities (USN-1893-1)	Nessus	Ubuntu Local Security Checks	high
66474	Apache Subversion < 1.6.21 / 1.7.x < 1.7.9 Multiple DoS	Nessus	Windows	medium
66252	Mandriva Linux Security Advisory : subversion (MDVSA-2013:153)	Nessus	Mandriva Local Security Checks	medium
65945	Slackware 13.0 / 13.1 / 13.37 / 14.0 / current : subversion (SSA:2013-095-01)	Nessus	Slackware Local Security Checks	medium
65849	FreeBSD : Subversion -- multiple vulnerabilities (b6beb137-9dc0-11e2-882f-20cf30e32f6d)	Nessus	FreeBSD Local Security Checks	medium

Detections

Analytics

CVE-2013-1884

high

Tenable Plugins

medium

high

medium

medium

high

medium

medium

medium

medium