TI-2023-11580 Aliases CVE-2023-26432 GHSA-9628-xx9p-xjqj

Uncontrolled resource consumption in Open-Xchange GmbH OX App Suite

LOW 22CWE-400Published 2023-06-20 · Updated 2024-12-03

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · Low
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-400.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01148 67th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Open-Xchange GmbH	OX App Suite	up to 7.10.6-rev39; up to 8.10	—	No fix listed	CNA

OX App Suite VendorOpen-Xchange GmbH Affected up to 7.10.6-rev39; up to 8.10 Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPE	Versions	Role	Vendor
cpe:2.3:a:open-xchange:open-xchange_appsuite_backend::::::::	before 7.10.6; 8.0.0 to before 8.11.0	Vulnerable	Open-Xchange GmbH
cpe:2.3:a:open-xchange:open-xchange_appsuite_backend:7.10.6:::::::*	7.10.6	Vulnerable	Open-Xchange GmbH
cpe:2.3:a:open-xchange:open-xchange_appsuite_backend:7.10.6:revision_39::::::	7.10.6 revision_39	Vulnerable	Open-Xchange GmbH

cpe:2.3:a:open-xchange:open-xchange_appsuite_backend:*:*:*:*:*:*:*:* Versions before 7.10.6; 8.0.0 to before 8.11.0 Vulnerable ·Open-Xchange GmbH
cpe:2.3:a:open-xchange:open-xchange_appsuite_backend:7.10.6:*:*:*:*:*:*:* Versions 7.10.6 Vulnerable ·Open-Xchange GmbH
cpe:2.3:a:open-xchange:open-xchange_appsuite_backend:7.10.6:revision_39:*:*:*:*:*:* Versions 7.10.6 revision_39 Vulnerable ·Open-Xchange GmbH

Remediation

No fixed version listed by the sources yet.

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Advisory · 2023-06-20
OX App Suite — documentation.open-xchange.com/appsuite/security/advisories…
9 records Highest priority Priority MEDIUM 1 MEDIUM, 8 LOW
Other records, highest priority first
- TI-2023-11584 Code injection in Open-Xchange GmbH OX App SuitePriority MEDIUM 41
- TI-2023-11576 Authorization bypass in Open-Xchange GmbH OX App SuitePriority LOW 31
- TI-2023-11577 Command injection in Open-Xchange GmbH OX App SuitePriority LOW 25
Show all 9 records → Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2023-26432
2026-10-03 Alias added: GHSA-9628-xx9p-xjqj

References

Advisory 3

Other 1

https://software.open-xchange.com/products/appsuite/doc/Release_Notes_for_Patch_Release_6219_7.10.6_2023-03-20.pdf

TI-2023-11591 SQL injection in Open-Xchange GmbH OX App Suite CVSS 3.1CRITICAL 9.8
TI-2023-11584 Code injection in Open-Xchange GmbH OX App Suite CVSS 3.1HIGH 8.8
TI-2023-11598 Functions with insufficient randomness were used to generate authorization tokens of the… CVSS 3.1HIGH 7.5
TI-2023-11576 Authorization bypass in Open-Xchange GmbH OX App Suite CVSS 3.1MEDIUM 6.5
TI-2016-05883 Cross-site scripting (XSS) vulnerability in Open-Xchange (OX) AppSuite backend before… CVSS 3.0MEDIUM 6.1
TI-2023-11577 Command injection in Open-Xchange GmbH OX App Suite CVSS 3.1MEDIUM 5.3

See all 13 →

Sources

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