CVE-2023-26431

Description

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.

Weakness classification

• CWE-918: Server-Side Request Forgery (SSRF)

Primary references

• security@open-xchange.com — Third Party Advisory, VDB Entry
• security@open-xchange.com — Mailing List, Third Party Advisory
• security@open-xchange.com
• security@open-xchange.com — Release Notes
• af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, VDB Entry
• af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108
• af854a3a-2127-422b-91ae-364da2661108 — Release Notes