IceWarp Mail Server Deep Castle 2 v.13.0.1.2 - Open Redirect

mediumseverity

6.1CVSS score

1.4%likelihood of exploitation, next 30 days

73%of all CVEs are less likely

Readycheck to confirm it

An issue in IceWarp Mail Server Deep Castle 2 v.13.0.1.2 allows a remote attacker to execute arbitrary code via a crafted request to the URL.

Impact

Attackers can craft malicious redirect URLs to phish IceWarp Mail Server users, potentially stealing email credentials by redirecting victims to attacker-controlled domains that mimic the legitimate login page.

Fix

Update IceWarp Mail Server Deep Castle 2 to a version newer than 13.0.1.2 that validates redirect URLs and prevents open redirect attacks.

How to confirm it

Send: GET {{BaseURL}}/%5coast.pro/%2f%2e%2e
Positive when: matches in header /(?m)^(?:Location\s*?:\s*?)(?:https?://|//)?(?:[a-zA-Z0-9\-_\.@]*)oast\.pro.*$/ AND status 302

Run it with nuclei: nuclei -id CVE-2023-40779 -u <target>

The full check

id: CVE-2023-40779

info:
  name: IceWarp Mail Server Deep Castle 2 v.13.0.1.2 - Open Redirect
  author: r3Y3r53
  severity: medium
  description: |
    An issue in IceWarp Mail Server Deep Castle 2 v.13.0.1.2 allows a remote attacker to execute arbitrary code via a crafted request to the URL.
  impact: |
    Attackers can craft malicious redirect URLs to phish IceWarp Mail Server users, potentially stealing email credentials by redirecting victims to attacker-controlled domains that mimic the legitimate login page.
  remediation: |
    Update IceWarp Mail Server Deep Castle 2 to a version newer than 13.0.1.2 that validates redirect URLs and prevents open redirect attacks.
  reference:
    - https://medium.com/@muthumohanprasath.r/open-redirection-vulnerability-on-icewarp-webclient-product-cve-2023-40779-61176503710
    - https://nvd.nist.gov/vuln/detail/CVE-2023-40779
    - https://medium.com/%40muthumohanprasath.r/open-redirection-vulnerability-on-icewarp-webclient-product-cve-2023-40779-61176503710
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2023-40779
    cwe-id: CWE-601
    epss-score: 0.01422
    epss-percentile: 0.73082
    cpe: cpe:2.3:a:icewarp:deep_castle_g2:13.0.1.2:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: icewarp
    product: deep_castle_g2
    shodan-query:
      - title:"IceWarp"
      - http.title:"icewarp"
    fofa-query: title="icewarp"
    google-query: intitle:"icewarp"
  tags: cve2023,cve,icewarp,redirect,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/%5coast.pro/%2f%2e%2e"

    matchers-condition: and
    matchers:
      - type: regex
        part: header
        regex:
          - '(?m)^(?:Location\s*?:\s*?)(?:https?://|//)?(?:[a-zA-Z0-9\-_\.@]*)oast\.pro.*$'

      - type: status
        status:
          - 302

References

Use this check only on systems you are authorised to test. Where the data comes from