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commit: 27f9f6206cc09e345feb25ca3a1a1905b48e769b |
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Author: Lukas Vrabec <lvrabec <AT> redhat <DOT> com> |
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AuthorDate: Wed Jul 27 15:35:03 2016 +0000 |
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Commit: Sven Vermeulen <swift <AT> gentoo <DOT> org> |
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CommitDate: Sun Jul 31 10:39:59 2016 +0000 |
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URL: https://gitweb.gentoo.org/proj/hardened-refpolicy.git/commit/?id=27f9f620 |
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|
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Add new MLS attribute to allow relabeling objects higher than system low. This exception is needed for package managers when processing sensitive data. |
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|
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Example of denial: |
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type=AVC msg=audit(1461664028.583:784): avc: denied { relabelto } for |
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pid=14322 comm="yum" name="libvirt" dev="dm-0" ino=670147 |
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scontext=root:system_r:rpm_t:s0 |
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tcontext=system_u:object_r:virt_cache_t:s0-s15:c0.c1023 tclass=dir |
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|
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policy/mls | 4 +++- |
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policy/modules/kernel/mls.if | 20 ++++++++++++++++++++ |
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policy/modules/kernel/mls.te | 1 + |
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3 files changed, 24 insertions(+), 1 deletion(-) |
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|
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diff --git a/policy/mls b/policy/mls |
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index 3603de1..db3ed90 100644 |
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--- a/policy/mls |
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+++ b/policy/mls |
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@@ -70,7 +70,9 @@ mlsconstrain { file lnk_file fifo_file } { create relabelto } |
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|
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# new file labels must be dominated by the relabeling subjects clearance |
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mlsconstrain { dir file lnk_file chr_file blk_file sock_file fifo_file } relabelto |
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- ( h1 dom h2 ); |
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+ (( h1 dom h2 ) or |
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+ (( t1 == mlsfilerelabeltoclr ) and ( h1 dom l2 )) or |
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+ ( t1 == mlsfilewrite )); |
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|
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# the file "read" ops (note the check is dominance of the low level) |
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mlsconstrain { dir file lnk_file chr_file blk_file sock_file fifo_file } { read getattr execute } |
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|
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diff --git a/policy/modules/kernel/mls.if b/policy/modules/kernel/mls.if |
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index 27d6401..829605b 100644 |
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--- a/policy/modules/kernel/mls.if |
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+++ b/policy/modules/kernel/mls.if |
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@@ -100,6 +100,26 @@ interface(`mls_file_write_to_clearance',` |
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######################################## |
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## <summary> |
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## Make specified domain MLS trusted |
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+## for relabelto to files up to its clearance. |
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+## </summary> |
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+## <param name="domain"> |
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+## <summary> |
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+## Domain allowed access. |
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+## </summary> |
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+## </param> |
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+## <rolecap/> |
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+# |
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+interface(`mls_file_relabel_to_clearance',` |
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+ gen_require(` |
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+ attribute mlsfilerelabeltoclr; |
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+ ') |
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+ |
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+ typeattribute $1 mlsfilerelabeltoclr; |
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+') |
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+ |
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+######################################## |
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+## <summary> |
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+## Make specified domain MLS trusted |
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## for writing to files at all levels. (Deprecated) |
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## </summary> |
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## <desc> |
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|
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diff --git a/policy/modules/kernel/mls.te b/policy/modules/kernel/mls.te |
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index e508050..13b8625 100644 |
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--- a/policy/modules/kernel/mls.te |
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+++ b/policy/modules/kernel/mls.te |
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@@ -12,6 +12,7 @@ attribute mlsfilewritetoclr; |
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attribute mlsfilewriteinrange; |
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attribute mlsfileupgrade; |
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attribute mlsfiledowngrade; |
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+attribute mlsfilerelabeltoclr; |
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|
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attribute mlsnetread; |
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attribute mlsnetreadtoclr; |
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