8.8
HIGH
CVE-2023-34108
Dovecot Password Manipulation in mailcow
Description

mailcow is a mail server suite based on Dovecot, Postfix and other open source software, that provides a modern web UI for user/server administration. A vulnerability has been discovered in mailcow which allows an attacker to manipulate internal Dovecot variables by using specially crafted passwords during the authentication process. The issue arises from the behavior of the `passwd-verify.lua` script, which is responsible for verifying user passwords during login attempts. Upon a successful login, the script returns a response in the format of "password=<valid-password>", indicating the successful authentication. By crafting a password with additional key-value pairs appended to it, an attacker can manipulate the returned string and influence the internal behavior of Dovecot. For example, using the password "123 mail_crypt_save_version=0" would cause the `passwd-verify.lua` script to return the string "password=123 mail_crypt_save_version=0". Consequently, Dovecot will interpret this string and set the internal variables accordingly, leading to unintended consequences. This vulnerability can be exploited by an authenticated attacker who has the ability to set their own password. Successful exploitation of this vulnerability could result in unauthorized access to user accounts, bypassing security controls, or other malicious activities. This issue has been patched in version `2023-05a`. Users are advised to upgrade. There are no known workarounds for this vulnerability.

INFO

Published Date :

June 7, 2023, 6:15 p.m.

Last Modified :

June 15, 2023, 3:31 p.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

2.8
Affected Products

The following products are affected by CVE-2023-34108 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Mailcow mailcow\
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2023-34108.

URL Resource
https://github.com/VladimirBorisov/CVE_proposal/blob/main/MailcowUserPassword.md Product
https://github.com/mailcow/mailcow-dockerized/commit/f80940efdccd393bf5fccec2886795372a38c445 Patch
https://github.com/mailcow/mailcow-dockerized/security/advisories/GHSA-mhh4-qchc-pv22 Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-34108 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2023-34108 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Jun. 15, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://github.com/mailcow/mailcow-dockerized/commit/f80940efdccd393bf5fccec2886795372a38c445 No Types Assigned https://github.com/mailcow/mailcow-dockerized/commit/f80940efdccd393bf5fccec2886795372a38c445 Patch
    Changed Reference Type https://github.com/mailcow/mailcow-dockerized/security/advisories/GHSA-mhh4-qchc-pv22 No Types Assigned https://github.com/mailcow/mailcow-dockerized/security/advisories/GHSA-mhh4-qchc-pv22 Vendor Advisory
    Changed Reference Type https://github.com/VladimirBorisov/CVE_proposal/blob/main/MailcowUserPassword.md No Types Assigned https://github.com/VladimirBorisov/CVE_proposal/blob/main/MailcowUserPassword.md Product
    Added CWE NIST NVD-CWE-noinfo
    Added CPE Configuration OR *cpe:2.3:a:mailcow:mailcow\:_dockerized:*:*:*:*:*:*:*:* versions up to (including) 2023-05
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-34108 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.10 }} 0.04%

score

0.40575

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability