CVE-2019-25042

unbound: out-of-bounds write via a compressed name in rdata_copy

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Severity

Moderate

Red Hat Product Security

9.8

CVSS 3.1

Review impact separately from score.

Published · December 11, 2019

Updated · November 22, 2025

Description

A flaw was found in unbound. An out-of-bounds write in the rdata_copy function may be abused by a remote attacker. The highest threat from this vulnerability is to data confidentiality and integrity as well as service availability.

Statement

According to the original report there are checks happening before the affected function that make this not exploitable. For these reasons its Impact is Moderate. Upstream has also disputed this CVE.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-787 · Out-of-bounds Write