CVE-2012-4449

What it is

Apache Hadoop before 0.23.4, 1.x before 1.0.4, and 2.x before 2.0.2 generate token passwords using a 20-bit secret when Kerberos security features are enabled, which makes it easier for context-dependent attackers to crack secret keys via a brute-force attack.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.

Exploit odds

1.2% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2017-10-30 19:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 23:45 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.2% in the next 30 days (EPSS).
• Severity: 9.8 CRITICAL (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2017-10-30 19:29 UTC

Last modified

2026-06-16 23:45 UTC

Exploit probability

1.2% · EPSS, next 30 days

Weakness

CWE-327 · Broken cryptographic algorithm

Record status

Modified

Affected

• Apache Hadoop ≤ 0.23.3
• Apache Hadoop 1.0.0
• Apache Hadoop 1.0.1
• Apache Hadoop 1.0.2
• Apache Hadoop 1.0.3
• Apache Hadoop 2.0.0
• Apache Hadoop 2.0.1
• Apache Hadoop 2.0.2

Attack profile CVSS 3.0 · 9.8

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Is it in your code?

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