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.

ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
OXCNA
4.3 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 32%
Affected Products (NVD)
VendorProductVersion
open-xchangeopen-xchange_appsuite_backend
𝑥
< 7.10.6
open-xchangeopen-xchange_appsuite_backend
8.0.0 ≤
𝑥
< 8.11.0
open-xchangeopen-xchange_appsuite_backend
7.10.6
open-xchangeopen-xchange_appsuite_backend
7.10.6:revision_39
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
ox_projectox
𝑥
≤ 8.10
CNA