Vulnerability Report

CVE-2023-23943

Title: Internal Service Scan via Mail App Host Fields

Sensitive Information Disclosure

Proof Of Concept

No public PoC currently indexed for CVE-2023-23943.

CWE Category CWE-918
Published Date Feb 06, 2023
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 5.0 CVSS v3.1
Exploit Probability (EPSS)
0.78%

Vulnerability Summary

CVE-2023-23943: Nextcloud mail is an email app for the nextcloud home server platform. In affected versions the SMTP, IMAP and Sieve host fields allowed to scan for internal services and servers reachable from within the local network of the Nextcloud Server. It is recommended that the Nextcloud Maill app is upgraded to 1.15.0 or 2.2.2. The only known workaround for this issue is to completely disable the nextcloud mail app.

Impacted Vendors

P
pear 1
B
basercms 1
N
nextcloud 1

Reference Links

https://github.com/nextcloud/mail/pull/7796 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8gcx-r739-9pf6 https://hackerone.com/reports/1736390 https://hackerone.com/reports/1741525 https://hackerone.com/reports/1746582 https://github.com/nextcloud/mail/pull/7796 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8gcx-r739-9pf6 https://hackerone.com/reports/1736390 https://hackerone.com/reports/1741525 https://hackerone.com/reports/1746582
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
5.0
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
4.3
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2023-23943 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

Affected Stack

No specific products linked.