CVE-2023-26432

When adding an external mail account, processing of SMTP "capabilities" responses are not limited to plausible sizes. Attacker with access to a rogue SMTP service could trigger requests that lead to excessive resource usage and eventually service unavailability. We now limit accepted SMTP server response to reasonable length/size. No publicly available exploits are known.

• CWE-400

• http://packetstormsecurity.com/files/173083/OX-App-Suite-SSRF-Resource-Consumption-Command-Injection.htmlThird Party Advisory, VDB Entry
• http://seclists.org/fulldisclosure/2023/Jun/8Mailing List, Third Party Advisory
• https://documentation.open-xchange.com/appsuite/security/advisories/csaf/2023/oxas-adv-2023-0002.json
• https://software.open-xchange.com/products/appsuite/doc/Release_Notes_for_Patch_Release_6219_7.10.6_2023-03-20.pdfRelease Notes
• http://packetstormsecurity.com/files/173083/OX-App-Suite-SSRF-Resource-Consumption-Command-Injection.htmlThird Party Advisory, VDB Entry
• http://seclists.org/fulldisclosure/2023/Jun/8Mailing List, Third Party Advisory
• https://documentation.open-xchange.com/appsuite/security/advisories/csaf/2023/oxas-adv-2023-0002.json
• https://software.open-xchange.com/products/appsuite/doc/Release_Notes_for_Patch_Release_6219_7.10.6_2023-03-20.pdfRelease Notes

Published

Jun 20, 2023

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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• CVE-2023-26428Attackers can successfully request arbitrary snippet IDs, in…6.5
• CVE-2023-26429Control characters were not removed when exporting user feed…5.3
• CVE-2023-2643A vulnerability classified as critical was found in SourceCo…9.8
• CVE-2023-26430Attackers with access to user accounts can inject arbitrary …4.3
• CVE-2023-26431IPv4-mapped IPv6 addresses did not get recognized as "local"…4.3
• CVE-2023-26433When adding an external mail account, processing of IMAP "ca…4.3
• CVE-2023-26434When adding an external mail account, processing of POP3 "ca…4.3
• CVE-2023-26435It was possible to call filesystem and network references us…5
• CVE-2023-26436Attackers with access to the "documentconverterws" API were …8.8
• CVE-2023-26437Denial of service vulnerability in PowerDNS Recursor allows …5.3
• CVE-2023-26438External service lookups for a number of protocols were vuln…3.1