SB2025050219 - Denial of service in Ruby Net::IMAP
Published: May 2, 2025
Security Bulletin ID
SB2025050219
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Resource exhaustion (CVE-ID: CVE-2025-43857)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources when reading server responses. A malicious server can trigger resource exhaustion and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://github.com/ruby/net-imap/pull/442
- https://github.com/ruby/net-imap/pull/444/commits/0ae8576c1a90bcd9573f81bdad4b4b824642d105#diff-53721cb4d9c3fb86b95cc8476ca2df90968ad8c481645220c607034399151462
- https://github.com/ruby/net-imap/pull/445
- https://github.com/ruby/net-imap/pull/446
- https://github.com/ruby/net-imap/pull/447
- https://github.com/ruby/net-imap/security/advisories/GHSA-j3g3-5qv5-52mj
- https://www.ruby-lang.org/en/news/2025/04/28/dos-net-imap-cve-2025-43857/