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🛡️ CVE-2025-24294 on Ubuntu — jruby

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

The attack vector is a potential Denial of Service (DoS). The vulnerability is caused by an insufficient check on the length of a decompressed domain name within a DNS packet. An attacker can craft a malicious DNS packet containing a highly compressed domain name. When the resolv library parses such a packet, the name decompression process consumes a large amount of CPU resources, as the library does not limit the resulting length of the name. This resource consumption can cause the application thread to become unresponsive, resulting in a Denial of Service condition.

Distribution advisory

This page covers CVE-2025-24294 as tracked by Ubuntu, for the package jruby. The fix is available in version 2.5.1-1ubuntu1.16+esm5; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: None.
  • Integrity impact: None.
  • Availability impact: High — total loss, or loss the attacker controls.

Weakness class

UBUNTU-CVE-2025-24294 is classified as CWE-1284: Improper Validation of Specified Quantity in Input. The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.

Affected software

UBUNTU-CVE-2025-24294 is recorded against 8 packages.

  • jruby
  • ruby2.3
  • ruby2.5 (fixed in 2.5.1-1ubuntu1.16+esm5)
  • ruby2.7 (fixed in 2.7.0-5ubuntu1.18+esm1)
  • ruby3.0 (fixed in 3.0.2-7ubuntu2.11)
  • ruby3.2 (fixed in 3.2.3-1ubuntu0.24.04.6)
  • ruby3.3 (fixed in 3.3.8-2ubuntu2)
  • rubygems (fixed in 3.6.7-2ubuntu1)

Timeline and source

Published on 12 July 2025 and last revised on 16 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

ubuntu.com (Report)
www.cve.org (Report)
www.ruby-lang.org (Report)
ubuntu.com (Advisory)
ubuntu.com (Advisory)

Other advisories for this package

jruby has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-1284: Improper Validation of Specified Quantity in Input) in other software:

CVE-2025-24294 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2025-07-12
Updated 2026-08-20
Modified 2026-07-16
Fix URL N/A

Affected Packages

Software From version Fixed in
jruby — —
ruby2.3 — —
ruby2.5 — 2.5.1-1ubuntu1.16+esm5
ruby2.7 — 2.7.0-5ubuntu1.18+esm1
ruby3.0 — 3.0.2-7ubuntu2.11
ruby3.2 — 3.2.3-1ubuntu0.24.04.6
ruby3.3 — 3.3.8-2ubuntu2
rubygems — 3.6.7-2ubuntu1

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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