관리-도구
편집 파일: audit_data.cpython-39.opt-1.pyc
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�seperms) r] �set_fields_from_textr r rL r �avc_rer r) rG )rJ r- rs rt r r r rq s z AuditRecord._init_postprocessc C s | � � S r )� to_host_textrO r r r rP ( s zAuditRecord.__str__c C s d | _ | jjd u r t� | j_d S r )rp r r, Z get_hostnamerO r r r �audispd_rectify+ s zAuditRecord.audispd_rectifyc C s. | j �� sdS | jd u r dS | jd u r*dS dS rY )r rl r �messagerO r r r rl 0 s zAuditRecord.is_validc C s4 | j d }|dkrdS |dkr"dS tj�d|� dS )Nrs ZdeniedFZgrantedTz!unknown value for seresult ('%s'))rL �logZavc�warn)rJ rs r r r � is_granted9 s zAuditRecord.is_grantedc C s� g d�}|D ]>}|| j v r | jdkr.|dkr.q | j | }t|�}|| j |< q | jdkr�t| j �� �D ]0\}}| j�|�rd| j | }t|�}|| j |< qdd S )N)Zacct�cmd�comm�cwdrK �dir�exe�filer, �key�msgr^ �newZocommold�pathZwatchr ZsaddrZEXECVE)rL r Zaudit_msg_decoderZ �items� exec_arg_rer )rJ Zencoded_fieldsZfield�valueZ decoded_valuer r r � decode_fieldsB s zAuditRecord.decode_fieldsc C sF z0t jd dk r |�d�W S t�|��d�W S W n | Y S 0 d S )Nr r �hexzutf-8)�sys� version_info�decode� bytearray�fromhex�rJ r� r r r � translate_hexV s zAuditRecord.translate_hexc C s g | _ i | _tj�|�D ]�}|�d�}|�d�}|�d�}z�|dkr^t�t |d��}t� |�}|dv r�|�d�� d�s�| � |�}|dkr�zt jtt |�� }W n Y n0 |dkr�t�t |�t�� �}|r�|}W n ty� Y n0 || j|< | j �|� qd S ) Nr1 r! �"�arch� )r^ r� r~ r} r� r �exit�syscall)� fields_ordrL r �key_value_pair_re�finditerr) �strip�auditZaudit_elf_to_machiner* Zaudit_machine_to_name� startswithr� �errno� errorcode�absZaudit_syscall_to_nameZaudit_detect_machinere �append)rJ r r- r� r� �iZ syscall_namer r r ru e s4 z AuditRecord.set_fields_from_textc C s | j �|�S r )rL �get)rJ r^ r r r � get_field� s zAuditRecord.get_fieldc C s" t |�}t�tjtjtj| j|�S r )rH �struct�packr �binary_header_format�binary_version�binary_header_sizer )rJ r� � msg_lengthr r r �get_binary_header� s �z AuditRecord.get_binary_headerc sj � j d u rdS � jdkr4d� j� jd�� j�f }nd� j� jf }|d�� fdd�� jD ��d 7 }|S ) N� r z#type=%s msg=%s: avc: denied { %s } � ztype=%s msg=%s: c s g | ]}d |� j | f �qS )z%s=%s)rL )r8 �krO r r r9 � r z.AuditRecord.fields_to_text.<locals>.<listcomp>� )rL r r rI �accessr� )rJ �bufr rO r �fields_to_text� s "zAuditRecord.fields_to_textc C s d| j | j| jf S )Nztype=%s msg=%s: %s )r r r rO r r r �to_text� s zAuditRecord.to_textc C s2 | j jd ur&d| j j| j| j | jf S | �� S d S )Nznode=%s type=%s msg=%s: %s )r r, r r r� rO r r r rw � s �zAuditRecord.to_host_textc C s d| j | jf }| �|�| S )Nz%s: %s)r r r� �rJ �recordr r r � to_binary� s zAuditRecord.to_binary)NN) r_ r` ra r r* r[ r� r� r� �calcsizer� r �compiler� rv r� rD rq rP rx rl r| r� r� ru r� r� r� r� rw r� rb r r rM r r s4 � " r c @ s, e Zd ZdZdZdd� Zdd� Zdd� Zd S ) r r1 r! c C sV || _ d| _d| _| j | jkr(| j| _n*| j | jkr>| j| _ntd|| j j f ��d S )Nr� r z unknown record format (%s) in %s) � record_format� _input_bufferrp r � feed_textZfeedr � feed_binaryre rN r_ )rJ r� r r r rD � s zAuditRecordReader.__init__c c s� t |�dkrd S | j|7 _t | j�tjk r2d S t�tj| jdtj� �\}}}}tj| }t | j�|k rpd S | jtj|� }t|�\}} } | j|d � | _|r t� |�| | d dfV q d S rg ) rH r� r r� r� �unpackr� r4 r� Zaudit_msg_type_to_name) rJ �new_datar� r� r r� Z total_lenr r r r r r r r� � s$ �� z AuditRecordReader.feed_binaryc c s� t |�dkrd S | j|7 _d}| j�d|�}|dkr�| jd7 _|d7 }| j||� }t|�\}}}}|r�|||d | jfV |}| j�d|�}q0| j|d � | _d S )Nr r� r1 )rH r� �findrp r ) rJ r� �start�end�liner r r r r r r r� � s zAuditRecordReader.feed_textN)r_ r` ra r r rD r� r� r r r r r � s !r c s� e Zd Zdded�ded�d�Z� fdd�Zdd � Zd d � Zd$d d�Z dd� Z e dd� �Z dd� Z dd� Zd%dd�Zdd� Zd d � Zd d � Zd d!� Zd"d#� Z� ZS )&r ro r )r; rZ rd rc )�recordsr c s* t t| ��� d | _g | _i | _d | _d S r )rC r rD r r� � record_types� timestamprO rM r r rD � s zAuditEvent.__init__c C s0 t | dd �d u ri | _| jD ]}| �|� q d S )Nr� )r] r� r� �process_recordr� r r r rq s z AuditEvent._init_postprocessc C sL | j }|�� d| j| �� | �� d�dd� |D ��d�dd� | jD ��f S )Nz2%s: is_avc=%s, is_granted=%s: line_numbers=[%s] %s�,c S s g | ] }t |��qS r �rR r7 r r r r9 r z&AuditEvent.__str__.<locals>.<listcomp>r� c S s g | ] }d | �qS )z %sr �r8 r� r r r r9 r )� line_numbers�sortr �is_avcr| rI r� )rJ r� r r r rP s ��zAuditEvent.__str__r� c C s |� dd� | jD ��S )Nc S s g | ] }t |��qS r r� r� r r r r9 r z%AuditEvent.format.<locals>.<listcomp>)rI r� )rJ � separatorr r r rT s zAuditEvent.formatc C s t | j�S r )rH r� rO r r r � num_records s zAuditEvent.num_recordsc C s dd� | j D �S )Nc S s g | ]}|j r|j �qS r )rp r� r r r r9 r z'AuditEvent.<lambda>.<locals>.<listcomp>)r� rO r r r r r zAuditEvent.<lambda>c C s | j �|� | �|� d S r )r� r� r� r� r r r � add_record s zAuditEvent.add_recordc C sp | j d u r2|j �� | _ t| j j�| j jd | _n | j |j ksRtd| j |j f ��| j�|j g �}|� |� d S )Nri zBcannot add audit record to audit event, event_id mismatch %s != %s) r rh rj r. r/ r� re r� � setdefaultr r� )rJ r� Z record_listr r r r� s �zAuditEvent.process_recordNc C sR g }|du r| j }n | �|�}|D ]*}|j�|�}|du r<q"|�||jf� q"|S )aN Return list of (value, record_type) tuples. 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Note: it is possible to have more than one record of a given type thus it is always possible to have multiple values returned.N)r� �get_records_of_typerL r� r� r@ )rJ r^ r r� r� r� r� r r r r� + s zAuditEvent.get_fieldc C s d }| j �|�}|r |d }|S rg �r� r� )rJ r@ r� r� r r r �get_record_of_type? s z AuditEvent.get_record_of_typec C s | j �|g �S r r� )rJ r@ r r r r� F s z AuditEvent.get_records_of_typec C s$ dD ]}| � |�}|r| S qd S )Nrr )r� )rJ r r� r r r �get_avc_recordI s zAuditEvent.get_avc_recordc C s | � � d uS r )r� rO r r r r� O s zAuditEvent.is_avcc C s: d}dD ],}| � |�}|D ]}|�� s. dS d}qq|S )NFrr T)r� r| )rJ Z all_grantedr r� r� r r r r| R s zAuditEvent.is_granted)r� )N)r_ r` ra r r r[ rD rq rP rT r� rm r� r� r� r� r� r� r� r� r| rb r r rM r r � s" � r c @ s e Zd ZdS )�AVCErrorN)r_ r` ra r r r r r� a s r� c @ s� e Zd ZdgZddgZg d�Zg d�Zg d�Zg d�Zg d�Z g d�Z g d �Z g d �Z g d �Z g d �Zg d �ZddgZdgZdgZg d�Zg d�Zg d�Zg d�ZdgZdgZg d�Zg d�Zg d�Zg d�Z ddgZ g d�Z e � d�Z!e � d�Z"dFd d �Z#d 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�scontext�tcontext�tclass�port�src_rpms�tgt_rpmsr, �pid�kmodr� �why�bools� derive_avc_info_from_audit_event)rJ r� � avc_recordr� r r r rD � s* z AVC.__init__c C s | � � S r )� format_avcrO r r r rP � s z AVC.__str__c C sN d}|d| j 7 }|d| j 7 }|d| j 7 }|d| j 7 }|d| j 7 }|S )Nr� z scontext=%s z tcontext=%s z access=%s z tclass=%s z tpath=%s )r� r� r� r� r� )rJ r r r r r� � s zAVC.format_avcc C s, | j du rdS | j D ]}||v r dS qdS )zMReturns true if the AVC contains _any_ of the permissions in the access list.NFT�r� �rJ Z access_list�ar r r �has_any_access_in� s zAVC.has_any_access_inc C s, | j du rdS | j D ]}||vr dS qdS )zmReturns true if _every_ access in the AVC matches at least one of the permissions in the access list.NFTr� r� r r r �all_accesses_are_in� s zAVC.all_accesses_are_inc C s� t � t� }|�� t� }|�� g }dd� dd� ttgt| jjt | j t | j i�D �D �}|}|D ]$}||v rb|� ttt|��d � qb|D ] }||v r�||vr�|�|� q�|�� |S )Nc S s g | ] }|t �qS r )ZTARGETr7 r r r r9 � r z,AVC.allowed_target_types.<locals>.<listcomp>c S s g | ]}|d r|�qS )Zenabledr )r8 r r r r r9 � r �types)Zget_all_file_typesZget_all_port_typesr� Zget_all_attributesr �ALLOW�SOURCEr� r@ ZCLASSr� ZPERMSr� �extend�next�infoZ ATTRIBUTEr� )rJ Z all_typesZall_attributesZ allowed_typesZwtypesr� �tr r r �allowed_target_types� s 4 zAVC.allowed_target_typesc C sB | � dg�r>z$| jr.t| j�t@ tjkr.W dS W n Y n0 dS )Nr� TF)r� �a1r* � O_ACCMODE�os�O_RDONLYrO r r r �open_with_write� s zAVC.open_with_writec C s" |D ]}t �||j�r dS qdS )NTF)r r- r@ )rJ �context� type_listr@ r r r Z __typeMatch� s zAVC.__typeMatchc C s | j du rdS | �| j |�S )zReturns true if the type in the source context of the avc regular expression matches any of the types in the type list.NF)r� �_AVC__typeMatch�rJ r r r r �matches_source_types� s zAVC.matches_source_typesc C s | j du rdS | �| j |�S )zReturns true if the type in the target context of the avc regular expression matches any of the types in the type list.NF)r� r r r r r �matches_target_types� s zAVC.matches_target_typesc C s | j d u rdS | j |v S )NF)r� )rJ Z tclass_listr r r � has_tclass_in� s zAVC.has_tclass_inc C s | � � | �� d S r )�derive_environmental_info�%update_derived_template_substitutionsrO r r r �update s z AVC.updatec C s t | j� S r )�is_standard_directoryr� rO r r r � path_is_not_standard_directory s z"AVC.path_is_not_standard_directoryc C s� | j �d�}| j �d�}| j �d�}|du r�| j�d�}|D ]D}|�d�}|rX|dkrXq<|�d�}|r<|r<|dkr<|�|�r< q�q<|r�tj�|�s�|dur�tj�|�r�tj�tj� ||��}|du �r"| j �d�}|du�r"| j �d�}|d kr�d | }n(|d k�r |d k�r|}nd | }n|}|du�r�|d k�r|�rg } �z�d } | j �d�} tj� d| ��rvt� d| �j } t |�} tdd�} | �� �d�D ]�}|�� }t|��r�|d d d k�r�zP| d k�s�t�|d �j | k�r t t� |d �j�| k�r | �|dd� � W n t�y( Y �q�Y n0 �q�| �� t| �dk�rR| d d }n�t| �dk�r�| D ]�}|d d| k�s�|d | k�r�|d } �q�nJz4| d k�r�t� |d �j | k�r�|d }W �q�W n t�y� Y n0 �qdW n. t�y d}Y n t�y d}Y n0 n�|�d �dk�r�|�r�d dl}ddd| g}zl|j||jd d �}t |�} |�d�D ]B}z&t t� |�j�| k�r�|}W �q�W n t�y� Y n0 �qlW n t �y� Y n0 |du�r$tj�|��r�| j � d |�}n4| j � |�}|�r| j!}|d d k�r$d |�"d � }|| _#| j#du �r~| j!d!k�rJd"| _#n4| j!d#k�sb| j!d$k�rtt$d%�| j% | _#n t$d&�| _#dS )'a� Derive the target path. If path information is available the avc record will have a path field and no name field because the path field is more specific and supersedes name. The name field is typically the directory entry. For some special files the kernel embeds instance information into the file name. For example 'pipe:[1234]' or 'socket:[1234]' where the number inside the brackets is the inode number. The proc pseudo file system has the process pid embedded in the name, for example '/proc/1234/mem'. These numbers are ephemeral and do not contribute meaningful information for our reports. Plus we may use the path information to decide if an alert is identical to a previous alert, we coalesce them if they are. The presence of an instance specific number in the path confuses this comparison. For these reasons we strip any instance information out of the path, Example input and output: pipe:[1234] --> pipe socket:[1234] --> socket /proc/1234/fd --> /proc/<pid>/fd ./foo --> ./foo /etc/sysconfig --> /etc/sysconfig r^ r� �inoN�PATHZnametypeZPARENTr� r� �%sr� �/r �devz/dev/z /proc/mounts�rr� r1 r z/dev/%sr! zunknown mountpointFZlocatez-bz\%sT)�stderrZuniversal_newlinesz \1<pid>\3� �@Z filesystemr� Z udp_socketZ tcp_socketzport %sZUnknown)&r� r� r� r� �endswithr r� �isabs�normpathrI �exists�lstat�st_rdevr* r� r� rG rH �stat�st_inor� �OSError�close� TypeErrorr� � subprocessZ check_outputZSTDOUT� Exception�proc_pid_instance_re�sub�pipe_instance_path_rer r� r� r� �_r� )rJ r r^ r� ZinodestrZavc_path_recordsZavc_path_recordr r� �matchesZdev_rdevr r �fdr� r r+ Zcommand�outputr� r- r r r � _set_tpath s� $ : � zAVC._set_tpathc C s� d | _ d | _d | _d | _d| _g | _d } } }}|r@|| _n | j�� | _| j� d�}| j� d�| _ t | j t�s�t| j� d��| _ t | jt�s�t| j� d��| _| j� d�| _| j� d�d u r�| j� d�| _n| j� d�| _| j� d �| _| j� d �| _|�r<|� d �}|� d �}|� d �| _|� d�dk| _|� d�| _|d u �rR| j� d �}|d u �rh| j� d �}|| _|�r||| _n|�r�| j| _| j�s�| j| _| j�s�| j j| _| j� d�}|�r�|� d�}nd }| �|� | j�d�} | D ]H} | � d�} tj�| ��s |�s| j�| � n| j�tj� || �� �q�g | _ g | _ | jj j | _ t!�"t#| j �t#| j�t#| j�| j �\| _$} | j$t!j%k�r�t&t'd�| j ��| j$t!j(k�r�t&t'd�| j ��| j$t!j)k�r�t&t'd���| j$t!j*k�r�t&t'd�| j ��| j$t!j+k�rt&t'd�| j ��| j$t!j,k�r.t&t'd�| j ��| j$t!j-k�rNt&t'd�| j ��| j$t!j.k�rht&t'd ���| j$t!j/k�r|| | _0d S ) NFZSYSCALLrt r� r� r� �dest�srcr� r� r� r~ r� �successZyesr ZCWDr r r^ z8%s **** Recorded AVC is allowed in current policy **** zh%s **** Recorded AVC is dontaudited in current policy. 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