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CVE-2020-9484

Quick assessment

Affected
n/a Apache Tomcat
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Tomcat是美国阿帕奇（Apache）基金会的一款轻量级Web应用服务器。该程序实现了对Servlet和JavaServer Page（JSP）的支持。 Apache Tomcat中存在代码问题漏洞。攻击者可通过控制服务器上文件的内容和名称等方法利用该漏洞执行代码。以下产品及版本受到影响：Apache Tomcat 10.0.0-M1版本至10.0.0-M4版本，9.0.0.0.M1版本至9.0.43之前版本，8.5.0版本至8.5.63之前版本，7.0.0版本至7.0.108之前版本。

AI Predicted 7.5 Difficulty: Hard EPSS 55.52% · P99

Public Exploits 1

Nuclei · 1 CVE-2020-9484.yaml [template]

Affected Version Matrix 1

VendorProduct Version RangeStatus
n/a Apache Tomcat Apache Tomcat 10.0.0-M1 to 10.0.0-M4, 9.0.0.M1 to 9.0.34, 8.5.0 to 8.5.54, 7.0.0 to 7.0.103 affected
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I. Basic Information for CVE-2020-9484

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
When using Apache Tomcat versions 10.0.0-M1 to 10.0.0-M4, 9.0.0.M1 to 9.0.34, 8.5.0 to 8.5.54 and 7.0.0 to 7.0.103 if a) an attacker is able to control the contents and name of a file on the server; and b) the server is configured to use the PersistenceManager with a FileStore; and c) the PersistenceManager is configured with sessionAttributeValueClassNameFilter="null" (the default unless a SecurityManager is used) or a sufficiently lax filter to allow the attacker provided object to be deserialized; and d) the attacker knows the relative file path from the storage location used by FileStore to the file the attacker has control over; then, using a specifically crafted request, the attacker will be able to trigger remote code execution via deserialization of the file under their control. Note that all of conditions a) to d) must be true for the attack to succeed.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Tomcat 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Tomcat是美国阿帕奇（Apache）基金会的一款轻量级Web应用服务器。该程序实现了对Servlet和JavaServer Page（JSP）的支持。 Apache Tomcat中存在代码问题漏洞。攻击者可通过控制服务器上文件的内容和名称等方法利用该漏洞执行代码。以下产品及版本受到影响：Apache Tomcat 10.0.0-M1版本至10.0.0-M4版本，9.0.0.0.M1版本至9.0.43之前版本，8.5.0版本至8.5.63之前版本，7.0.0版本至7.0.108之前版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
- Apache Tomcat Apache Tomcat 10.0.0-M1 to 10.0.0-M4, 9.0.0.M1 to 9.0.34, 8.5.0 to 8.5.54, 7.0.0 to 7.0.103 -

II. Public POCs for CVE-2020-9484

# POC Description Source Link Shenlong Link
1 tomcat使用了自带session同步功能时，不安全的配置（没有使用EncryptInterceptor）导致存在的反序列化漏洞，通过精心构造的数据包， 可以对使用了tomcat自带session同步功能的服务器进行攻击。PS:这个不是CVE-2020-9484，9484是session持久化的洞，这个是session集群同步的洞！ https://github.com/threedr3am/tomcat-cluster-session-sync-exp POC Details
2 None https://github.com/masahiro331/CVE-2020-9484 POC Details
3 利用ceye批量检测CVE-2020-9484 https://github.com/seanachao/CVE-2020-9484 POC Details
4 用Kali 2.0复现Apache Tomcat Session反序列化代码执行漏洞 https://github.com/IdealDreamLast/CVE-2020-9484 POC Details
5 for Ubuntu 18.04, improve functions. https://github.com/qerogram/CVE-2020-9484 POC Details
6 CVE-2020-9484 Mass Scanner, Scan a list of urls for Apache Tomcat deserialization (CVE-2020-9484) which could lead to RCE https://github.com/osamahamad/CVE-2020-9484-Mass-Scan POC Details
7 None https://github.com/anjai94/CVE-2020-9484-exploit POC Details
8 None https://github.com/PenTestical/CVE-2020-9484 POC Details
9 A smol bash script I threw together pretty quickly to scan for vulnerable versions of the Apache Tomcat RCE. I'll give it some love when I have the time. https://github.com/DanQMoo/CVE-2020-9484-Scanner POC Details
10 None https://github.com/AssassinUKG/CVE-2020-9484 POC Details
11 POC for CVE-2020-9484 https://github.com/VICXOR/CVE-2020-9484 POC Details
12 None https://github.com/DXY0411/CVE-2020-9484 POC Details
13 Apache Tomcat RCE (CVE-2020-9484) https://github.com/RepublicR0K/CVE-2020-9484 POC Details
14 POC - Apache Tomcat Deserialization Vulnerability (CVE-2020-9484) https://github.com/ColdFusionX/CVE-2020-9484 POC Details
15 Exploit for Apache Tomcat deserialization (CVE-2020-9484) which could lead to RCE https://github.com/d3fudd/CVE-2020-9484_Exploit POC Details
16 small test to prevent sql injections attack. 🔒 CVE-2020-9484 https://github.com/pxcs/webLogin-DEV POC Details
17 Remake of CVE-2020-9484 by Pentestical https://github.com/0dayCTF/CVE-2020-9484 POC Details
18 Bash POC for CVE-2020-9484 that i used in tryhackme challenge https://github.com/Disturbante/CVE-2020-9484 POC Details
19 Remake of CVE-2020-9484 by Pentestical https://github.com/deathquote/CVE-2020-9484 POC Details
20 PoC exploit for CVE-2020-9484, and a vulnerable web application for its demonstration https://github.com/savsch/PoC_CVE-2020-9484 POC Details
21 When using Apache Tomcat versions 10.0.0-M1 to 10.0.0-M4, 9.0.0.M1 to 9.0.34, 8.5.0 to 8.5.54 and 7.0.0 to 7.0.103 if a) an attacker is able to control the contents and name of a file on the server; and b) the server is configured to use the PersistenceManager with a FileStore; and c) the PersistenceManager is configured with sessionAttributeValueClassNameFilter="null" (the default unless a SecurityManager is used) or a sufficiently lax filter to allow the attacker provided object to be deserialized; and d) the attacker knows the relative file path from the storage location used by FileStore to the file the attacker has control over; then, using a specifically crafted request, the attacker will be able to trigger remote code execution via deserialization of the file under their control. Note that all of conditions a) to d) must be true for the attack to succeed. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2020/CVE-2020-9484.yaml POC Details
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III. Intelligence Information for CVE-2020-9484

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Vendor Advisories for CVE-2020-9484 (12)

Mailing List Discussions for CVE-2020-9484 (26)

Other References for CVE-2020-9484 (1)

Same Patch Batch · n/a · 2020-05-20 · 17 CVEs total

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CVE-2020-5753 Signal Private Messenger 信息泄露漏洞
CVE-2020-3956 VMware Cloud Director 注入漏洞
CVE-2020-11716 多款Panasonic产品安全漏洞
CVE-2020-12835 SmartBear Software ReadyAPI 注入漏洞
CVE-2020-13152 KDE Amarok 资源管理错误漏洞
CVE-2020-13226 WSO2 API Manager 代码问题漏洞
CVE-2020-13225 phpIPAM 跨站脚本漏洞
CVE-2020-12034 Rockwell Automation EDS Subsystem SQL注入漏洞

IV. Related Vulnerabilities

Same product: Apache Tomcat
Same vendor: n/a

V. Comments for CVE-2020-9484

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