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2025-09-14 22:27:11 +00:00

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【M22项目】Security Policy在限定了source ip的情况下安全日志出现其他client ip

ID Creation Date Assignee Status
OMPUB-1343 2024-06-27T16:06:33.000+0800 杨威 已关闭

M22现场下发一条策略“Lantern_vpn_ test”策略详情如图

!image-2024-06-27-14-27-05-083.png|width=422,height=218!

!image-2024-06-27-14-27-42-813.png|width=425,height=272!

策略于2024-06-27 09:52:24已经限定Source IP Address但是在查询Security Events2024-06-27 10:33:26 to 2024-06-27 10:45:53日志的时候发现日志展示的client ip出现一些除了Source IP Address条件限定外的IP Address如图

!image-2024-06-27-16-12-30-071.png|width=560,height=293!

在此期间除了客户修改了策略条件外,无其他操作,修改前后策略对比:

!image-2024-06-27-16-13-02-214.png|width=267,height=403!

!image-2024-06-27-14-33-12-912.png|width=261,height=393!

 

 zhengchao commented on 2024-06-27T20:10:47.778+0800:

[~liuchang]  写个maat的单测复现一下用maat_cmd_set_line接口构造

session属性 src IP_X -> dst IP

测试流程:

规则 rule1: src IP_Y & dst IP

maat_scan(session.src_ip_Y), maat_scan(session.dst_Ip) 

EXPECT 不命中

新建规则 app1compile: dst IP

修改rule1 : src IP_Y & app1

reset maat_state

maat_scan(session.src_ip_X), maat_scan(session.dst_Ip)

EXPECT不命中


yangwei commented on 2024-06-27T20:22:39.849+0800:

用户操作

根据audit log{}10:33~10:52{}之间,对应策略存在如下修改操作:

!image-2024-06-28-17-24-50-136.png|width=247,height=560!!image-2024-06-28-17-25-00-177.png|width=277,height=565!

  • v12 策略条件 source IP + destination IP
  • v13 策略条件从source IP + destination IP变更为source IP + APPID
  • v14 策略失效
  • v15 策略生效
  • v16 策略失效
  • v17 策略生效

异常日志

  • 从现场导出Security Event Log查询条件为“reveive time10:34-10:52 start time 10:31-10:33” 共计13752条日志其中ClientIP非策略条件中的11555条{}异常日志{} ** 异常命中的会话会话持续时间普遍超过60s少量会话持续时间较短<10s ** 92台Sled均出现异常日志
  • 按sled_ip==10.161.12.10过滤异常命中会话出现的end time策略条件为Deny该时间通常为命中策略的时刻时段为{}10:33:28~10:46:27{}对应maat的日志[^firewall.cm.maat.2024-06-27]

功能端日志

  • 查询10.161.12.10设备的maat规则更新日志10:33:2810:46:27之间存在6次增量每次加载的entries在36条之间 ** 10:41:39的增量加载后SECURITY_COMPILE_PLUGIN的rule_count从130变更为129 ** 10:41:52的增量加载后又从129变回130

!image-2024-06-27-20-07-09-538.png|width=875,height=298!

 

根据现场收集的信息本issue中的误命中发生时段为用户界面多次修改策略的过程。推测在该过程中功能端执行策略时策略条件退化为APPID。

 

 


liuchang commented on 2024-06-28T14:19:29.899+0800:

maat单测用例未复现测试流程

session属性 src IP 45.112.178.18 -> dst IP 2.2.2.2

规则 rule1: src IP 103.89.49.6 & dst IP 2.2.2.2

maat_scan_ipv4("45.112.178.18"), maat_scan_ipv4("2.2.2.2") 

EXPECT 不命中,{}实际不命中{}

新建规则 app1compile: dst IP{}只新建了app_id表的一个group{}

修改rule1 : src 103.89.49.6 & app1group

reset maat_state

maat_scan_ipv4("45.112.178.18"), maat_scan_group(app1.group_id)

EXPECT不命中{}实际不命中{}


zhangwei commented on 2024-06-28T15:49:08.038+0800:

在信息港44.3环境模拟现场操作情况操作一条生效的ID为212的安全策略

  1. 修改策略条件修改前条件source+destination修改后条件source+application产生如下图的MAA_UPDATE_STATUS修改操作每个表的每个操作版本号+1删除+1新增+1下图涉及两张表所以本次修改操作MAAT_VERSION+4

!image-2024-06-28-15-41-40-712.png!

  1. 停用策略MAAT_VERSION+2两张表

!image-2024-06-28-15-41-10-125.png!

  1. 启用策略MAAT_VERSION+2两张表

!image-2024-06-28-15-46-16-611.png!


liuchang commented on 2024-06-28T16:05:01.646+0800:

补充测试MAAT单测中模拟CM的行为操作策略修改策略条件和启停策略未复现bug


liuxueli commented on 2024-06-28T20:57:38.863+0800:

  • 京版网关环境稳定复现本BUG误命中的持续时间约4分钟 ** 策略ID=5211 2024-06-28 20:03:39~20:07:33存在误命中
  •  京版网关环境复现步骤: ** 创建策略条件Source IP+Destination IP, 生效策略

{code:java} [root@tsg-traffic-engine-vsys-1-firewall-854678cd59-h42pr policy.5211.sip.dip]# cat MONITOR_COMPILE.00000000000000086731 | grep 5211 5211    11    1    0    2    {}    {"packet_capture":{"enable":0},"traffic_mirror":{"enable":0},"vsys_id":1}    2    1    1719575997000000 0    key=5211 [root@tsg-traffic-engine-vsys-1-firewall-854678cd59-h42pr policy.5211.sip.dip]# cat GROUP_MONITOR_COMPILE_RELATION.00000000000000086731 | grep -w 5211 8758    5211    0    ATTR_SOURCE_IP    0    1    1719575997000000 0    key=9844 16328    5211    0    ATTR_DESTINATION_IP    1    1    1719575997000000 0    key=9845 [root@tsg-traffic-engine-vsys-1-firewall-854678cd59-h42pr policy.5211.sip.dip]#  {code}

** 修改策略条件:  Source IP+ Application, 生效策略


{code:java} [root@tsg-traffic-engine-vsys-1-firewall-854678cd59-h42pr policy.5211.sip.del.dip.add.app]# cat MONITOR_COMPILE.00000000000000086735 | grep 5211 5211    11    1    0    2    {}    {"packet_capture":{"enable":0},"traffic_mirror":{"enable":0},"vsys_id":1}    2    1    1719576219000000 0    key=5211 [root@tsg-traffic-engine-vsys-1-firewall-854678cd59-h42pr policy.5211.sip.del.dip.add.app]# cat GROUP_MONITOR_COMPILE_RELATION.00000000000000086735 | grep -w 5211 16365    5211    0    ATTR_APP_ID    0    1    1719576219000000 0    key=9846 8758    5211    0    ATTR_SOURCE_IP    1    1    1719576219000000 0    key=9847 [root@tsg-traffic-engine-vsys-1-firewall-854678cd59-h42pr policy.5211.sip.del.dip.add.app]#{code}

** 从dump的策略详情可以看出{color:#ff0000}策略修改前后ATTR_SOURCE_IP对应的cluster ID由0变更为1{color}在这种场景下maat添加自测试用例能复现误命中问题用例如下 *** 添加策略 **** 添加策略条件 ATTR_SOURCE_IP(1.1.1.1)  cluster ID=0 **** 添加策略条件 ATTR_DESTINATION_IP(2.2.2.2) cluster ID=1  **** Scan Source IP(3.3.3.3) **** scan Destination IP (2.2.2.2)  *** 修改策略 **** 删除策略条件 ATTR_SOURCE_IP  cluster ID=0 **** 删除策略条件 ATTR_DESTINATION_IP cluster ID=1  **** 添加策略条件 ATTR_SOURCE_IP  cluster ID=1 **** 添加策略条件 ATTR_APP_ID(group=1000) cluster ID=0 **** Scan Application(group_id=1000)

  • 原因: ** maat扫描命中group ID后将clause ID记录在maat_state中策略更新时clause ID发生变化时没有更新maat_state中的clause ID故发生误命中。 *** 扫描source IP + Destination IP后配置更新clause ID发生变化maat_state中clause ID未更新接着扫描Application时实际生效条件变为Destination IP + Application

gitlab commented on 2024-07-01T14:58:10.825+0800:

[刘畅|https://git.mesalab.cn/liuchang] mentioned this issue in [a merge request|https://git.mesalab.cn/tango/maat/-/merge_requests/292] of [TSG-OS / Maat|https://git.mesalab.cn/tango/maat] on branch [bugfix/should-clear-clause-id-when-reomve-group-from-clause|https://git.mesalab.cn/tango/maat/-/tree/bugfix/should-clear-clause-id-when-reomve-group-from-clause]:{quote}fix OMPUB-1343 and add a test case for this bug{quote}


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