CVE-2016-8734

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.

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.

Subversion's mod_dontdothat module and clients using http(s):// are vulnerable to a denial-of-service attack caused by exponential XML entity expansion. The attack, otherwise known as the "billion laughs attack", targets XML parsers and can cause the targeted process to consume an excessive amount of CPU resources or memory (CVE-2016-8734).

These are all security issues fixed in the libsvn_auth_gnome_keyring-1-0-1.9.5-1.1 package on the GA media of openSUSE Tumbleweed.

This update for subversion fixes the following issue:

• CVE-2016-8734: Unrestricted XML entity expansion in mod_dontdothat and Subversion clients using http(s):// (bsc#1011552).

• CVE-2017-9800: client code execution via argument injection in SSH URL (bnc#1051362)

This update for subversion fixes the following issues:

• CVE-2017-9800: A malicious, compromised server or MITM may cause svn client to execute arbitrary commands by sending repository content with svn:externals definitions pointing to crafted svn+ssh URLs. (bsc#1051362)

• Malicious user may commit SHA-1 collisions and cause repository inconsistencies (bsc#1026936)

• CVE-2016-8734: Unrestricted XML entity expansion in mod_dontdothat and Subversion clients using http(s):// could lead to denial of service (bsc#1011552)

• CVE-2016-2167: svnserve/sasl may authenticate users using the wrong realm (bsc#976849)

• CVE-2016-2168: Remotely triggerable DoS vulnerability in mod_authz_svn during COPY/MOVE authorization check (bsc#976850)

• mod_authz_svn: fix authz with mod_auth_kerb/mod_auth_ntlm (bsc#977424)

• make the subversion package conflict with KWallet and Gnome Keyring packages with do not require matching subversion versions in SLE 12 and openSUSE Leap 42.1 and thus break the main package upon partial upgrade. (bsc#969159)

• CVE-2015-5343: 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)

• Avoid recommending 180+ new pkgs for installation on minimal setup due subversion-password-store (bsc#942819)

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

• CVE-2015-3187: do not leak paths that were hidden by path-based authz (bsc#939517)

• CVE-2015-0202: Subversion HTTP servers with FSFS repositories were vulnerable to a remotely triggerable excessive memory use with certain REPORT requests. (bsc#923793)

• CVE-2015-0248: Subversion mod_dav_svn and svnserve were vulnerable to a remotely triggerable assertion DoS vulnerability for certain requests with dynamically evaluated revision numbers. (bsc#923794)

• CVE-2015-0251: Subversion HTTP servers allow spoofing svn:author property values for new revisions (bsc#923795)

• fix sample configuration comments in subversion.conf (bsc#916286)

• fix sysconfig file generation (bsc#911620)

• CVE-2014-3580: mod_dav_svn invalid REPORT requests could lead to denial of service (bsc#909935)

• CVE-2014-8108: mod_dav_svn use of invalid transaction names could lead to denial of service (bsc#909935)

• INSTALL#SQLite says 'Subversion 1.8 requires SQLite version 3.7.12 or above'; therefore I lowered the sqlite requirement to make the subversion run on older system versions, tooi. [bsc#897033]

Joern Schneeweisz discovered that Subversion did not properly handle host names in 'svn+ssh://' URLs. A remote attacker could use this to construct a subversion repository that when accessed could run arbitrary code with the privileges of the user. (CVE-2017-9800)

Daniel Shahaf and James McCoy discovered that Subversion did not properly verify realms when using Cyrus SASL authentication. A remote attacker could use this to possibly bypass intended access restrictions. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-2167)

Florian Weimer discovered that Subversion clients did not properly restrict XML entity expansion when accessing http(s):// URLs. A remote attacker could use this to cause a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-8734)