CVE-2019-9858

 

Published at: - 29-05-2019 07:29

Last modified: - 18-04-2022 07:13

Total changes: - 3

Description

Remote code execution was discovered in Horde Groupware Webmail 5.2.22 and 5.2.17. Horde/Form/Type.php contains a vulnerable class that handles image upload in forms. When the Horde_Form_Type_image method onSubmit() is called on uploads, it invokes the functions getImage() and _getUpload(), which uses unsanitized user input as a path to save the image. The unsanitized POST parameter object[photo][img][file] is saved in the $upload[img][file] PHP variable, allowing an attacker to manipulate the $tmp_file passed to move_uploaded_file() to save the uploaded file. By setting the parameter to (for example) ../usr/share/horde/static/bd.php, one can write a PHP backdoor inside the web root. The static/ destination folder is a good candidate to drop the backdoor because it is always writable in Horde installations. (The unsanitized POST parameter went probably unnoticed because it's never submitted by the forms, which default to securely using a random path.)

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

 

Verification logic

 

Reference

• https://ssd-disclosure.com/?p=3814&preview=true
• http://packetstormsecurity.com/files/152476/Horde-Form-Shell-Upload.html
• [debian-lts-announce] 20190616 [SECURITY] [DLA 1822-1] php-horde-form security update-Mailing List, Third Party Advisory
• DSA-4468-Third Party Advisory
• 20190624 [SECURITY] [DSA 4468-1] php-horde-form security update-Mailing List, Third Party Advisory

 

Keywords

NVD

 

CVE-2019-9858

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures