CVE-2025-59032: Improper Input Validation in Open-Xchange GmbH OX Dovecot Pro
ManageSieve AUTHENTICATE command crashes when using literal as SASL initial response. This can be used to crash ManageSieve service repeatedly, making it unavailable for other users. Control access to ManageSieve port, or disable the service if it's not needed. Alternatively upgrade to a fixed version. No publicly available exploits are known.
AI Analysis
Technical Summary
The vulnerability CVE-2025-59032 involves improper input validation in the ManageSieve AUTHENTICATE command of OX Dovecot Pro. Specifically, when a literal is used as the SASL initial response, the service crashes, enabling repeated denial of service attacks against the ManageSieve service. The CVSS 3.1 base score is 7.5 (high), reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and an impact limited to availability. Red Hat has released security updates for affected packages in Red Hat Enterprise Linux 7 Extended Life Cycle Support to fix this issue.
Potential Impact
Successful exploitation causes a denial of service by crashing the ManageSieve service, making it unavailable to legitimate users. There is no impact on confidentiality or integrity. The vulnerability can be triggered remotely without authentication or user interaction.
Mitigation Recommendations
Red Hat has released official security updates that fix this vulnerability in their Extended Life Cycle Support 7 packages. Applying these updates will remediate the issue. Until patched, controlling access to the ManageSieve port or disabling the ManageSieve service if not needed can mitigate the risk. No public exploits are known, reducing immediate urgency but patching is recommended.
CVE-2025-59032: Improper Input Validation in Open-Xchange GmbH OX Dovecot Pro
Description
ManageSieve AUTHENTICATE command crashes when using literal as SASL initial response. This can be used to crash ManageSieve service repeatedly, making it unavailable for other users. Control access to ManageSieve port, or disable the service if it's not needed. Alternatively upgrade to a fixed version. No publicly available exploits are known.
CVSS v3.1
Score 7.5high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2025-59032 involves improper input validation in the ManageSieve AUTHENTICATE command of OX Dovecot Pro. Specifically, when a literal is used as the SASL initial response, the service crashes, enabling repeated denial of service attacks against the ManageSieve service. The CVSS 3.1 base score is 7.5 (high), reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and an impact limited to availability. Red Hat has released security updates for affected packages in Red Hat Enterprise Linux 7 Extended Life Cycle Support to fix this issue.
Potential Impact
Successful exploitation causes a denial of service by crashing the ManageSieve service, making it unavailable to legitimate users. There is no impact on confidentiality or integrity. The vulnerability can be triggered remotely without authentication or user interaction.
Mitigation Recommendations
Red Hat has released official security updates that fix this vulnerability in their Extended Life Cycle Support 7 packages. Applying these updates will remediate the issue. Until patched, controlling access to the ManageSieve port or disabling the ManageSieve service if not needed can mitigate the risk. No public exploits are known, reducing immediate urgency but patching is recommended.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- OX
- Date Reserved
- 2025-09-08T14:22:28.105Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2025-59032","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:26564","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:17602","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:13498","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:19149","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:13830","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:19455","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:19453","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:18053","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:17630","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:17628","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:17625","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:17626","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:13857","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:19364","vendor":"Red Hat"}]
Threat ID: 69c63ffa3c064ed76f701a4b
Added to database: 03/27/2026, 08:29:46 UTC
Last enriched: 07/15/2026, 08:20:29 UTC
Last updated: 07/31/2026, 19:22:56 UTC
Views: 114
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