CVE-2015-5477highunder attackCWE-617

CVE-2015-5477

Published · Updated

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100Vexday Risk Score

Patch now. It under exploitation confirmed by CISA and has a working public exploit.

ssvc Actcvss 7.5epss 100%
from disclosure to weapon2 days
Published on NVDJul 29
1st PoC+2d
metasploitJul 28
CISA KEV+4089d
What the vendors declare (VEX)

Official vendor statements in CSAF/VEX format: whether their product is affected, already fixed, or ruled out — and why. These are the vendor's assertions, not Vexday's judgment.

Affected
1 product
Red Hat Enterprise Linux 4
no_fix_planned: Will not fix
Fixed
27 products (419 components)
Red Hat Enterprise Linux (v. 5 server) · Red Hat Enterprise Linux Server (v. 7) · Red Hat Enterprise Linux Server Optional (v. 7) · Red Hat Enterprise Linux Server (v. 6) · Red Hat Enterprise Linux Server EUS (v. 6.6) · and others 22
Action required by CISAfederal deadline: 2026-10-11

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

In short

BIND DNS servers crash when they receive certain TKEY queries from remote attackers, causing the DNS service to stop working.

Technical detail

A remote attacker can trigger an assertion failure in ISC BIND 9.x (before 9.9.7-P2) and 9.10.x (before 9.10.2-P3) by sending crafted TKEY queries, leading to daemon termination and denial of service. No authentication or special privileges are required; the vulnerability is exploitable over the network.

Summary generated and translated by AI from the official description.
named in ISC BIND 9.x before 9.9.7-P2 and 9.10.x before 9.10.2-P3 allows remote attackers to cause a denial of service (REQUIRE assertion failure and daemon exit) via TKEY queries.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
n/a · n/a
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