Unbounded Memory Allocation in Stalwart IMAP parser_CVE-2025-61600

7.5 / 10

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

Stalwart is a mail and collaboration server. Versions 0.13.3 and below contain an unbounded memory allocation vulnerability in the IMAP protocol parser which allows remote attackers to exhaust server memory, potentially triggering the system's out-of-memory (OOM) killer and causing a denial of service. The CommandParser implementation enforces size limits on its dynamic buffer in most parsing states, but several state handlers omit these validation checks. This issue is fixed in version 0.13.4. A workaround for this issue is to implement rate limiting and connection monitoring at the network level, however this does not provide complete protection.

Basic Information

ID CVE-2025-61600

Source GitHub_M

Published Oct 2, 2025 at 21:30

Affected Product

Vendor stalwartlabs

Product stalwart

Version < 0.13.4

Affected Versions stalwartlabs stalwart < 0.13.4

CWE Classification

CWE-400 CWE-789

References

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    "published": "2025-10-02T21:30:52.203Z",
    "modified": "2025-10-02T21:30:52.203Z",
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