Sigma rule: Zimbra Collaboration Suite Email Server Unauthenticated RCE

Rule

Title

Zimbra Collaboration Suite Email Server Unauthenticated RCE

Status

test

Level

medium

Author

@gott_cyber

Date

2022-08-17

Modified

2023-01-02

File

rules-emerging-threats/2022/Exploits/CVE-2022-27925/web_cve_2022_27925_exploit.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects an attempt to leverage the vulnerable servlet "mboximport" for an unauthenticated remote command injection

Log source

category

webserver

Detection

selection_servlet:
    cs-method: 'POST'
    cs-uri-query|contains: '/service/extension/backup/mboximport\?'
    cs-uri-query|contains|all:
        - 'account-name'
        - 'ow'
        - 'no-switch'
        - 'append'
    sc-status:
        - 401
        - 200
selection_shell:
    cs-uri-query|contains: '/zimbraAdmin/'
    cs-uri-query|endswith: '.jsp'
    sc-status|contains: '200'
condition: 1 of selection_*

False positives (as the rule lists them)

• Unknown

Tags

• attack.initial-access
• attack.t1190
• cve.2022-27925
• detection.emerging-threats

CVEs this rule names

• CVE-2022-27925

MITRE ATT&CK ids this rule names

• T1190

References

• https://www.volexity.com/blog/2022/08/10/mass-exploitation-of-unauthenticated-zimbra-rce-cve-2022-27925/
• https://www.yang99.top/index.php/archives/82/
• https://github.com/vnhacker1337/CVE-2022-27925-PoC

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2022/Exploits/CVE-2022-27925/web_cve_2022_27925_exploit.yml