SSRF in Open-Xchange Appsuite Backend
CVE-2023-26431
IPv4-mapped IPv6 addresses did not get recognized as "local" by the code and a connection attempt is made. Attackers with access to user accounts could use this to bypass existing deny-list functionality and trigger requests to restricted network infrastructure to gain insight about topology and running services. We now respect possible IPV4-mapped IPv6 addresses when checking if contained in a deny-list. No publicly available exploits are known.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.008 (56.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Open-Xchange Appsuite Backend — versions 7.10.6
- Ox Software Gmbh App Suite — versions 0
Weakness classification (CWE)
References
- software.open-xchange.com/products/appsuite/doc/Release_Notes_for_Patch_Release… (release-notes, Release Notes)
- documentation.open-xchange.com/appsuite/security/advisories/csaf/2023/oxas-adv-… (vendor-advisory)
- seclists.org/fulldisclosure/2023/Jun/8 (Mailing List, Third Party Advisory)
- packetstormsecurity.com/files/173083/OX-App-Suite-SSRF-Resource-Consumption-Com… (VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-26431?
- CVE-2023-26431 is a medium-severity vulnerability in Open-Xchange Appsuite Backend, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.0/10. Published 2023-06-20.
- How severe is CVE-2023-26431?
- Medium severity. CVSS v3 base score is 5.0 out of 10.