CVE-2025-43857

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Source
https://nvd.nist.gov/vuln/detail/CVE-2025-43857
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-43857.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-43857
Aliases
Related
Published
2025-04-28T16:15:33Z
Modified
2025-05-12T20:43:57.229978Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.5.7, 0.4.20, 0.3.9, and 0.2.5, there is a possibility for denial of service by memory exhaustion when net-imap reads server responses. At any time while the client is connected, a malicious server can send can send a "literal" byte count, which is automatically read by the client's receiver thread. The response reader immediately allocates memory for the number of bytes indicated by the server response. This should not be an issue when securely connecting to trusted IMAP servers that are well-behaved. It can affect insecure connections and buggy, untrusted, or compromised servers (for example, connecting to a user supplied hostname). This issue has been patched in versions 0.5.7, 0.4.20, 0.3.9, and 0.2.5.

References

Affected packages

Debian:12 / ruby3.1

Package

Name
ruby3.1
Purl
pkg:deb/debian/ruby3.1?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.1.2-7
3.1.2-7+deb12u1
3.1.2-7+hurd.1
3.1.2-8
3.1.2-8.1~exp1
3.1.2-8.3
3.1.2-8.4
3.1.2-8.5

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / ruby3.3

Package

Name
ruby3.3
Purl
pkg:deb/debian/ruby3.3?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.3.1-1
3.3.1-2
3.3.1-3
3.3.1-4
3.3.1-5
3.3.1-6
3.3.4-1
3.3.4-2
3.3.4-2+hurd.1
3.3.5-1
3.3.5-2
3.3.6-1
3.3.6-1.1
3.3.6-1.1+hurd.1
3.3.6-1.1+ports
3.3.6-1.1+x32
3.3.7-1
3.3.7-2
3.3.8-1
3.3.8-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}