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GitHub_MCVELIST:CVE-2023-23943

HistoryFeb 06, 2023 - 8:18 p.m.

CVE-2023-23943 Blind SSRF via server URL input in the Nextcloud Mail app

2023-02-0620:18:33

CWE-918

GitHub_M

www.cve.org

cve-2023-23943

ssrf

nextcloud mail

smtp

imap

sieve

nextcloud server

internal services

5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

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

5.2 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

33.6%

JSON

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.

CNA Affected

[
  {
    "vendor": "nextcloud",
    "product": "security-advisories",
    "versions": [
      {
        "version": ">= 2.0.0, < 2.2.2",
        "status": "affected"
      },
      {
        "version": "< 1.15.0",
        "status": "affected"
      }
    ]
  }
]

References

github.com/nextcloud/mail/pull/7796

github.com/nextcloud/security-advisories/security/advisories/GHSA-8gcx-r739-9pf6

hackerone.com/reports/1736390

hackerone.com/reports/1741525

hackerone.com/reports/1746582

5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

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

5.2 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

33.6%

JSON

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