[Low] Patch subversion for CVE-2024-46901

SPECS/subversion/CVE-2024-46901-advisory.patch

@@ -0,0 +1,255 @@
+  mod_dav_svn denial-of-service via control characters in paths
+
+Summary:
+========
+
+  It has been discovered that the patch for CVE-2013-1968 was incomplete
+  and unintentionally left mod_dav_svn vulnerable to control characters
+  in filenames.
+
+  If a path or a revision-property which contains control characters is
+  committed to a repository then SVN operations served by mod_dav_svn
+  can be disrupted.
+
+Known vulnerable:
+=================
+
+ Subversion mod_dav_svn servers through 1.14.4 (inclusive).
+
+Known fixed:
+============
+
+  Servers running Subversion 1.14.5
+
+Details:
+========
+
+  If a path which contains control characters is committed to a repository
+  then SVN operations served by mod_dav_svn can be disrupted by encoding
+  errors raised from the XML library.
+
+  This leads to disruption for users accessing the repository via HTTP.
+  Affected repositories can be repaired (see "Recommendations" below).
+  However, restoring proper operation might take some time because a
+  full dump/load cycle may be required.
+
+  Local repositories and svnserve repository servers (accessed via a
+  file://, svn://, or svn+ssh:// URL) are not affected. In these cases,
+  control characters have been rejected since CVE-2013-1968 was patched
+  in Subversion 1.6.21 and Subversion 1.7.9.
+
+  Known symptoms of the problem include:
+
+   1) 'svn checkout', 'svnsync', and other operations that attempt to
+      read the affected revision may produce errors like:
+
+         svn: E175009: The XML response contains invalid XML
+         svn: E130003: Malformed XML: not well-formed (invalid token)
+
+   2) Attempts to browse affected files or directories via the web
+      interface will cause the server to return:
+
+         500 Internal Server Error
+
+  Apache Subversion clients have always rejected filenames with control
+  characters, so control characters cannot be introduced with stock
+  Subversion clients. They could, however, be triggered by custom
+  malicious Subversion clients or by third-party client implementations.
+
+  Servers updated to Subversion 1.14.5 will reject control characters in
+  all cases.
+
+Severity:
+=========
+
+  CVSSv3.1 Base Score: 3.1
+  CVSSv3.1 Base Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
+
+  A remote authenticated attacker with commit access may be able to
+  corrupt repositories on a Subversion server and cause disruption for
+  other users.
+
+  Configurations that allow anonymous write access to the repository
+  will be vulnerable to this without authentication.
+
+Recommendations:
+================
+
+  We recommend all users to upgrade their servers to a known fixed
+  release of Subversion.
+
+  Users who are unable to upgrade may apply the patch included below.
+
+  New Subversion packages can be found at:
+  http://subversion.apache.org/packages.html
+
+  Repositories affected by this problem can be repaired manually:
+
+  Bad revision properties can be repaired by using svn propedit over
+  the file://, svn:// or svn+ssh:// protocols.
+
+  Bad paths which have entered a repository need to be removed from
+  history with a dump/load cycle, using svnadmin dump --exclude to
+  filter out the bad paths, and loading the result into a fresh
+  repository with svnadmin load.
+
+References:
+===========
+
+  CVE-2024-46901 (Subversion)
+  CVE-2013-1968 (Subversion)
+
+  XML Characters: https://www.w3.org/TR/xml/#charsets
+
+Reported by:
+============
+
+  HaoZi, WordPress China
+
+Patches:
+========
+
+  Patch against Subversion 1.14.4:
+
+Link: https://subversion.apache.org/security/CVE-2024-46901-advisory.txt
+
+[[[
+Index: subversion/include/private/svn_repos_private.h
+===================================================================
+--- subversion/include/private/svn_repos_private.h	(revision 1921550)
++++ subversion/include/private/svn_repos_private.h	(working copy)
+@@ -390,6 +390,14 @@ svn_repos__get_dump_editor(const svn_delta_editor_
+                            const char *update_anchor_relpath,
+                            apr_pool_t *pool);
+
++/* Validate that the given PATH is a valid pathname that can be stored in
++ * a Subversion repository, according to the name constraints used by the
++ * svn_repos_* layer.
++ */
++svn_error_t *
++svn_repos__validate_new_path(const char *path,
++                             apr_pool_t *scratch_pool);
++
+ #ifdef __cplusplus
+ }
+ #endif /* __cplusplus */
+Index: subversion/libsvn_repos/commit.c
+===================================================================
+--- subversion/libsvn_repos/commit.c	(revision 1921550)
++++ subversion/libsvn_repos/commit.c	(working copy)
+@@ -308,8 +308,7 @@ add_file_or_directory(const char *path,
+   svn_boolean_t was_copied = FALSE;
+   const char *full_path, *canonicalized_path;
+
+-  /* Reject paths which contain control characters (related to issue #4340). */
+-  SVN_ERR(svn_path_check_valid(path, pool));
++  SVN_ERR(svn_repos__validate_new_path(path, pool));
+
+   SVN_ERR(svn_relpath_canonicalize_safe(&canonicalized_path, NULL, path,
+                                         pool, pool));
+Index: subversion/libsvn_repos/repos.c
+===================================================================
+--- subversion/libsvn_repos/repos.c	(revision 1921550)
++++ subversion/libsvn_repos/repos.c	(working copy)
+@@ -2092,3 +2092,13 @@ svn_repos__fs_type(const char **fs_type,
+                      svn_dirent_join(repos_path, SVN_REPOS__DB_DIR, pool),
+                      pool);
+ }
++
++svn_error_t *
++svn_repos__validate_new_path(const char *path,
++                             apr_pool_t *scratch_pool)
++{
++  /* Reject paths which contain control characters (related to issue #4340). */
++  SVN_ERR(svn_path_check_valid(path, scratch_pool));
++
++  return SVN_NO_ERROR;
++}
+Index: subversion/mod_dav_svn/lock.c
+===================================================================
+--- subversion/mod_dav_svn/lock.c	(revision 1921550)
++++ subversion/mod_dav_svn/lock.c	(working copy)
+@@ -36,6 +36,7 @@
+ #include "svn_pools.h"
+ #include "svn_props.h"
+ #include "private/svn_log.h"
++#include "private/svn_repos_private.h"
+
+ #include "dav_svn.h"
+
+@@ -717,6 +718,12 @@ append_locks(dav_lockdb *lockdb,
+
+       /* Commit a 0-byte file: */
+
++      if ((serr = svn_repos__validate_new_path(resource->info->repos_path,
++                                               resource->pool)))
++        return dav_svn__convert_err(serr, HTTP_BAD_REQUEST,
++                                    "Request specifies an invalid path.",
++                                    resource->pool);
++
+       if ((serr = dav_svn__get_youngest_rev(&rev, repos, resource->pool)))
+         return dav_svn__convert_err(serr, HTTP_INTERNAL_SERVER_ERROR,
+                                     "Could not determine youngest revision",
+Index: subversion/mod_dav_svn/repos.c
+===================================================================
+--- subversion/mod_dav_svn/repos.c	(revision 1921550)
++++ subversion/mod_dav_svn/repos.c	(working copy)
+@@ -2928,6 +2928,16 @@ open_stream(const dav_resource *resource,
+
+   if (kind == svn_node_none) /* No existing file. */
+     {
++      serr = svn_repos__validate_new_path(resource->info->repos_path,
++                                          resource->pool);
++
++      if (serr != NULL)
++        {
++          return dav_svn__convert_err(serr, HTTP_BAD_REQUEST,
++                                      "Request specifies an invalid path.",
++                                      resource->pool);
++        }
++
+       serr = svn_fs_make_file(resource->info->root.root,
+                               resource->info->repos_path,
+                               resource->pool);
+@@ -4120,6 +4130,14 @@ create_collection(dav_resource *resource)
+         return err;
+     }
+
++  if ((serr = svn_repos__validate_new_path(resource->info->repos_path,
++                                           resource->pool)) != NULL)
++    {
++      return dav_svn__convert_err(serr, HTTP_BAD_REQUEST,
++                                  "Request specifies an invalid path.",
++                                  resource->pool);
++    }
++
+   if ((serr = svn_fs_make_dir(resource->info->root.root,
+                               resource->info->repos_path,
+                               resource->pool)) != NULL)
+@@ -4194,6 +4212,12 @@ copy_resource(const dav_resource *src,
+         return err;
+     }
+
++  serr = svn_repos__validate_new_path(dst->info->repos_path, dst->pool);
++  if (serr)
++    return dav_svn__convert_err(serr, HTTP_BAD_REQUEST,
++                                "Request specifies an invalid path.",
++                                dst->pool);
++
+   src_repos_path = svn_repos_path(src->info->repos->repos, src->pool);
+   dst_repos_path = svn_repos_path(dst->info->repos->repos, dst->pool);
+
+@@ -4430,6 +4454,12 @@ move_resource(dav_resource *src,
+   if (err)
+     return err;
+
++  serr = svn_repos__validate_new_path(dst->info->repos_path, dst->pool);
++  if (serr)
++    return dav_svn__convert_err(serr, HTTP_BAD_REQUEST,
++                                "Request specifies an invalid path.",
++                                dst->pool);
++
+   /* Copy the src to the dst. */
+   serr = svn_fs_copy(src->info->root.root,  /* the root object of src rev*/
+                      src->info->repos_path, /* the relative path of src */
+]]]

SPECS/subversion/subversion.spec

@@ -1,13 +1,14 @@
 Summary:        The Apache Subversion control system
 Name:           subversion
 Version:        1.14.3
-Release:        1%{?dist}
+Release:        2%{?dist}
 License:        ASL 2.0
 Vendor:         Microsoft Corporation
 Distribution:   Azure Linux
 Group:          Utilities/System
 URL:            https://subversion.apache.org/
 Source0:        https://archive.apache.org/dist/%{name}/%{name}-%{version}.tar.bz2
+Patch0:         CVE-2024-46901-advisory.patch
 BuildRequires:  apr-devel
 BuildRequires:  apr-util
 BuildRequires:  apr-util-devel
@@ -48,7 +49,7 @@ Requires:       %{name} = %{version}
 Provides Perl (SWIG) support for Subversion version control system.
 
 %prep
-%autosetup -p1
+%autosetup -p0
 
 %build
 export CFLAGS="%{build_cflags} -Wformat"
@@ -103,6 +104,9 @@ sudo -u test make check && userdel test -r -f
 %{_mandir}/man3/SVN*
 
 %changelog
+* Fri Mar 07 2025 Kevin Lockwood <v-klockwood@microsoft.com> - 1.14.3-2
+- Add patch for CVE-2024-46901
+
 * Fri Feb 23 2024 CBL-Mariner Servicing Account <cblmargh@microsoft.com> - 1.14.3-1
 - Auto-upgrade to 1.14.3 - Azure Linux 3.0 Upgrades