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CVE-2013-6382 xfs: missing check for ZERO_SIZE_PTR (rhbz 1033603 1034670)

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Josh Boyer 2013-11-26 12:20:03 -05:00
parent df86f70991
commit c3ad71cb77
2 changed files with 158 additions and 0 deletions
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9
kernel.spec
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@ -827,6 +827,9 @@ Patch25155: libertas-potential-oops-in-debugfs.patch
#CVE-2013-6380 rhbz 1033593 1034304
Patch25156: aacraid-prevent-invalid-pointer-dereference.patch
#CVE-2013-6382 rhbz 1033603 1034670
Patch25157: xfs-underflow-bug-in-xfs_attrlist_by_handle.patch
# END OF PATCH DEFINITIONS
%endif
@ -1612,6 +1615,9 @@ ApplyPatch libertas-potential-oops-in-debugfs.patch
#CVE-2013-6380 rhbz 1033593 1034304
ApplyPatch aacraid-prevent-invalid-pointer-dereference.patch
#CVE-2013-6382 rhbz 1033603 1034670
ApplyPatch xfs-underflow-bug-in-xfs_attrlist_by_handle.patch
# END OF PATCH APPLICATIONS
%endif
@ -2414,6 +2420,9 @@ fi
# ||----w |
# || ||
%changelog
* Tue Nov 26 2013 Josh Boyer <jwboyer@fedoraproject.org>
- CVE-2013-6382 xfs: missing check for ZERO_SIZE_PTR (rhbz 1033603 1034670)
* Mon Nov 25 2013 Josh Boyer <jwboyer@fedoraproject.org>
- CVE-2013-6380 aacraid: invalid pointer dereference (rhbz 1033593 1034304)
- CVE-2013-6378 libertas: potential oops in debugfs (rhbz 1033578 1034183)

149
xfs-underflow-bug-in-xfs_attrlist_by_handle.patch Normal file
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@ -0,0 +1,149 @@
Bugzilla: 1033603
Upstream-status: Submitted but not queued http://thread.gmane.org/gmane.comp.file-systems.xfs.general/57654
Path: news.gmane.org!not-for-mail
From: Dan Carpenter <dan.carpenter@oracle.com>
Newsgroups: gmane.comp.file-systems.xfs.general
Subject: [patch] xfs: underflow bug in xfs_attrlist_by_handle()
Date: Thu, 31 Oct 2013 21:00:10 +0300
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Cc: Fabian Yamaguchi <fabs@goesec.de>, security@kernel.org,
Alex Elder <elder@kernel.org>, Nico Golde <nico@ngolde.de>, xfs@oss.sgi.com
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If we allocate less than sizeof(struct attrlist) then we end up
corrupting memory or doing a ZERO_PTR_SIZE dereference.
This can only be triggered with CAP_SYS_ADMIN.
Reported-by: Nico Golde <nico@ngolde.de>
Reported-by: Fabian Yamaguchi <fabs@goesec.de>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 4d61340..33ad9a7 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -442,7 +442,8 @@ xfs_attrlist_by_handle(
return -XFS_ERROR(EPERM);
if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
return -XFS_ERROR(EFAULT);
- if (al_hreq.buflen > XATTR_LIST_MAX)
+ if (al_hreq.buflen < sizeof(struct attrlist) ||
+ al_hreq.buflen > XATTR_LIST_MAX)
return -XFS_ERROR(EINVAL);
/*
diff --git a/fs/xfs/xfs_ioctl32.c b/fs/xfs/xfs_ioctl32.c
index e8fb123..a7992f8 100644
--- a/fs/xfs/xfs_ioctl32.c
+++ b/fs/xfs/xfs_ioctl32.c
@@ -356,7 +356,8 @@ xfs_compat_attrlist_by_handle(
if (copy_from_user(&al_hreq, arg,
sizeof(compat_xfs_fsop_attrlist_handlereq_t)))
return -XFS_ERROR(EFAULT);
- if (al_hreq.buflen > XATTR_LIST_MAX)
+ if (al_hreq.buflen < sizeof(struct attrlist) ||
+ al_hreq.buflen > XATTR_LIST_MAX)
return -XFS_ERROR(EINVAL);
/*
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