Integer overflow in util.c in mod_dav_svn in Apache Subversion 1.7.x, 1.8.x before 1.8.15, and 1.9.x before 1.9.3 allows remote authenticated users to cause a denial of service (subversion server crash or memory consumption) and possibly execute arbitrary code via a skel-encoded request body, which triggers an out-of-bounds read and heap-based buffer overflow.

The remote Redhat Enterprise Linux 7 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - subversion: (mod_dav_svn) integer overflow when parsing skel-encoded request bodies (CVE-2015-5343)

  - The canonicalize_username function in svnserve/cyrus_auth.c in Apache Subversion before 1.8.16 and 1.9.x     before 1.9.4, when Cyrus SASL authentication is used, allows remote attackers to authenticate and bypass     intended access restrictions via a realm string that is a prefix of an expected repository realm string.
    (CVE-2016-2167)

  - The req_check_access function in the mod_authz_svn module in the httpd server in Apache Subversion before     1.8.16 and 1.9.x before 1.9.4 allows remote authenticated users to cause a denial of service (NULL pointer     dereference and crash) via a crafted header in a (1) MOVE or (2) COPY request, involving an authorization     check. (CVE-2016-2168)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

According to the versions of the subversion packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - Apache Subversion's mod_dontdothat module and HTTP     clients 1.4.0 through 1.8.16, and 1.9.0 through 1.9.4     are vulnerable to a denial-of-service attack caused by     exponential XML entity expansion. The attack can cause     the targeted process to consume an excessive amount of     CPU resources or memory.(CVE-2016-8734)

  - Integer overflow in util.c in mod_dav_svn in Apache     Subversion 1.7.x, 1.8.x before 1.8.15, and 1.9.x before     1.9.3 allows remote authenticated users to cause a     denial of service (subversion server crash or memory     consumption) and possibly execute arbitrary code via a     skel-encoded request body, which triggers an     out-of-bounds read and heap-based buffer     overflow.(CVE-2015-5343)

  - The canonicalize_username function in     svnserve/cyrus_auth.c in Apache Subversion before     1.8.16 and 1.9.x before 1.9.4, when Cyrus SASL     authentication is used, allows remote attackers to     authenticate and bypass intended access restrictions     via a realm string that is a prefix of an expected     repository realm string.(CVE-2016-2167)

  - The req_check_access function in the mod_authz_svn     module in the httpd server in Apache Subversion before     1.8.16 and 1.9.x before 1.9.4 allows remote     authenticated users to cause a denial of service (NULL     pointer dereference and crash) via a crafted header in     a (1) MOVE or (2) COPY request, involving an     authorization check.(CVE-2016-2168)

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

According to the versions of the subversion packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - Integer overflow in util.c in mod_dav_svn in Apache     Subversion 1.7.x, 1.8.x before 1.8.15, and 1.9.x before     1.9.3 allows remote authenticated users to cause a     denial of service (subversion server crash or memory     consumption) and possibly execute arbitrary code via a     skel-encoded request body, which triggers an     out-of-bounds read and heap-based buffer     overflow.(CVE-2015-5343)

  - The canonicalize_username function in     svnserve/cyrus_auth.c in Apache Subversion before     1.8.16 and 1.9.x before 1.9.4, when Cyrus SASL     authentication is used, allows remote attackers to     authenticate and bypass intended access restrictions     via a realm string that is a prefix of an expected     repository realm string.(CVE-2016-2167)

  - The req_check_access function in the mod_authz_svn     module in the httpd server in Apache Subversion before     1.8.16 and 1.9.x before 1.9.4 allows remote     authenticated users to cause a denial of service (NULL     pointer dereference and crash) via a crafted header in     a (1) MOVE or (2) COPY request, involving an     authorization check.(CVE-2016-2168)

  - Apache Subversion's mod_dontdothat module and HTTP     clients 1.4.0 through 1.8.16, and 1.9.0 through 1.9.4     are vulnerable to a denial-of-service attack caused by     exponential XML entity expansion. The attack can cause     the targeted process to consume an excessive amount of     CPU resources or memory.(CVE-2016-8734)

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

New subversion packages are available for Slackware 14.0, 14.1, and
-current to fix security issues.

It was found that when an SVN server (both svnserve and httpd with the mod_dav_svn module) searched the history of a file or a directory, it would disclose its location in the repository if that file or directory was not readable (for example, if it had been moved).
(CVE-2015-3187)

An integer overflow was discovered allowing remote attackers to execute arbitrary code via an svn:// protocol string, which triggers a heap-based buffer overflow and an out-of-bounds read. (CVE-2015-5259)

It was found that the mod_authz_svn module did not properly restrict anonymous access to Subversion repositories under certain configurations when used with Apache httpd 2.4.x. This could allow a user to anonymously access files in a Subversion repository, which should only be accessible to authenticated users. (CVE-2015-3184)

It was found that the mod_dav_svn module was vulnerable to a remotely triggerable heap-based buffer overflow and out-of-bounds read caused by an integer overflow when parsing skel-encoded request bodies, allowing an attacker with write access to a repository to cause a denial of service attack (on 32-bit or 64-bit servers) or possibly execute arbitrary code (on 32-bit servers only) under the context of the httpd process. (CVE-2015-5343)

This update includes the latest stable release of _Apache Subversion_, version **1.9.3**. ### User-visible changes: #### Client-side bugfixes: * svn: fix possible crash in auth credentials cache * cleanup: avoid unneeded memory growth during pristine cleanup * diff:
fix crash when repository is on server root * fix translations for commit notifications * ra_serf: fix crash in multistatus parser * svn:
report lock/unlock errors as failures * svn: cleanup user deleted external registrations * svn: allow simple resolving of binary file text conflicts * svnlook: properly remove tempfiles on diff errors * ra_serf: report built- and run-time versions of libserf * ra_serf: set Content- Type header in outgoing requests * svn: fix merging deletes of svn:eol-style CRLF/CR files * ra_local: disable zero-copy code path #### Server-side bugfixes: * mod_authz_svn: fix authz with mod_auth_kerb/mod_auth_ntlm ( [issue 4602](http://subversion.tigris.org/issues/show_bug.cgi?id=4602)) * mod_dav_svn: fix display of process ID in cache statistics * mod_dav_svn: use LimitXMLRequestBody for skel-encoded requests * svnadmin dump: preserve no-op changes * fsfs: avoid unneeded I/O when opening transactions #### Bindings bugfixes: * javahl: fix ABI incompatibility with 1.8 * javahl: allow non- absolute paths in SVNClient.vacuum ### Developer-visible changes: #### General :

  - fix patch filter invocation in svn_client_patch() * add     \@since information to config defines * fix running the     tests in compatibility mode * clarify documentation of     svn_fs_node_created_rev() #### API changes: * fix     overflow detection in svn_stringbuf_remove and _replace
    * don't ignore some of the parameters to     svn_ra_svn_create_conn3

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

This update includes the latest stable release of _Apache Subversion 1.8_, version **1.8.15**. This update fixes two security issues: *
**CVE-2015-3184**: Subversion's mod_authz_svn does not properly restrict anonymous access in some mixed anonymous/authenticated environments when using Apache httpd 2.4.
http://subversion.apache.org/security/CVE-2015-3184-advisory.txt *
**CVE-2015-3187**: Subversion servers, both httpd and svnserve, will reveal some paths that should be hidden by path-based authz.
http://subversion.apache.org/security/CVE-2015-3187-advisory.txt ### User- visible changes: #### Client-side bugfixes: * gpg-agent: fix crash with non- canonical $HOME * document svn:autoprops * cp: fix 'svn cp ^/A/D/H at 1 ^/A' to properly create A * resolve: improve conflict prompts for binary files * ls: improve performance of '-v' on tag directories * improved Sqlite 3.8.9 query performance regression on externals * fixed [issue 4580](http://subversion.tigris.org/issues/show_bug.cgi?id=4580): 'svn
-v st' on file externals reports '?' instead of user and revision after 'svn up' #### Client-side and server-side bugfixes: * fix a segfault with old style text delta #### Server-side bugfixes: * fsfs:
reduce memory allocation with Apache * mod_dav_svn: emit first log items as soon as possible * mod_dav_svn: use LimitXMLRequestBody for skel-encoded requests * mod_dav_svn: do not ignore skel parsing errors
* detect invalid svndiff data earlier * prevent possible repository corruption on power/disk failures * fixed [issue 4577](http://subversion.tigris.org/issues/show_bug.cgi?id=4577): Read error with nodes whose DELTA chain starts with a PLAIN rep * fixed [issue 4531](http://subversion.tigris.org/issues/show_bug.cgi?id=4531):
server-side copy (over dav) is slow and uses too much memory #### Bindings bugfixes: * swig: fix memory corruption in svn_client_copy_source_t ### Developer-visible changes: #### General:
* avoid failing some tests on versions of Python with a very old sqlite * fix Ruby tests so they don't use the users real configuration #### Bindings: * swig-pl: fix some stack memory problems

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

The version of Apache Subversion installed on the remote host is 1.7.x, 1.8.x prior to 1.8.15, or 1.9.x prior to 1.9.3 and is affected by a buffer overflow vulnerability. Specifically, these versions contain an integer overflow condition in the 'request_body_to_string()' function in 'mod_dav_svn/util.c' that is triggered when handling skel-encoded request bodies. This may allow an authenticated, remote attacker to cause a heap-based buffer overflow, crashing the service or potentially allowing the execution of arbitrary code. (CVE-2015-5343)

This update fixes the following security issues :

  - CVE-2015-5343: Possible remotely triggerable heap     overflow and out-of-bounds read in mod_dav_svn caused by     integer overflow when parsing skel-encoded request     bodies. (bsc#958300)

  - CVE-2015-3184: mod_authz_svn information leak     information in mixed anonymous/authenticated httpd (dav)     configurations (bsc#939514)

  - CVE-2015-3187: hidden paths leaked by path-based authz     (bsc#939517)

This update for subversion fixes the following issues :

  - Apache Subversion 1.8.15 This release fixes one security     issue: Remotely triggerable heap overflow and     out-of-bounds read in mod_dav_svn caused by integer     overflow when parsing skel-encoded request bodies.
    CVE-2015-5343 [boo#958300]

  - fix a segfault with old style text delta

  - fsfs: reduce memory allocation with Apache

  - mod_dav_svn: emit first log items as soon as possible

  - mod_dav_svn: use LimitXMLRequestBody for skel-encoded     requests

  - swig: fix memory corruption in svn_client_copy_source_t

  - better configure-time detection of httpd authz fix (drop     subversion-1.8.14-httpd-version-number-detection.patch,     replace subversion-1.8.9-allow-httpd-2.4.6.patch with     subversion-1.8.15-allow-httpd-2.4.6.patch as a result

Ivan Zhakov discovered an integer overflow in mod_dav_svn, which allows an attacker with write access to the server to execute arbitrary code or cause a denial of service.

The oldstable distribution (wheezy) is not affected.

Subversion Project reports :

Remotely triggerable heap overflow and out-of-bounds read caused by integer overflow in the svn:// protocol parser.

Remotely triggerable heap overflow and out-of-bounds read in mod_dav_svn caused by integer overflow when parsing skel-encoded request bodies.

ID	Name	Product	Family	Severity
199170	RHEL 7 : subversion (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	high
132204	EulerOS 2.0 SP3 : subversion (EulerOS-SA-2019-2669)	Nessus	Huawei Local Security Checks	high
131824	EulerOS 2.0 SP5 : subversion (EulerOS-SA-2019-2550)	Nessus	Huawei Local Security Checks	high
131657	EulerOS 2.0 SP2 : subversion (EulerOS-SA-2019-2504)	Nessus	Huawei Local Security Checks	high
90363	Slackware 14.0 / 14.1 / current : subversion (SSA:2016-097-01)	Nessus	Slackware Local Security Checks	high
90269	Amazon Linux AMI : mod_dav_svn / subversion (ALAS-2016-676)	Nessus	Amazon Linux Local Security Checks	high
89372	Fedora 23 : subversion-1.9.3-1.fc23 (2015-afdb0e8aaa)	Nessus	Fedora Local Security Checks	high
89276	Fedora 22 : subversion-1.8.15-1.fc22 (2015-6efa349a85)	Nessus	Fedora Local Security Checks	high
9068	Apache Subversion < 1.8.15 / 1.9.x < 1.9.3 Buffer Overflow	Nessus Network Monitor	Web Servers	medium
87624	openSUSE Security Update : subversion (openSUSE-2015-949)	Nessus	SuSE Local Security Checks	high
87623	openSUSE Security Update : subversion (openSUSE-2015-948)	Nessus	SuSE Local Security Checks	high
87431	Debian DSA-3424-1 : subversion - security update	Nessus	Debian Local Security Checks	high
87388	FreeBSD : subversion -- multiple vulnerabilities (daadef86-a366-11e5-8b40-20cf30e32f6d)	Nessus	FreeBSD Local Security Checks	high

Detections

Analytics

CVE-2015-5343

high

Tenable Plugins

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medium

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