Apache Hadoop 2.5.1 symlink attack

2014.12.04

Credit: Jason Lowe

Risk: Medium

Local: No

Remote: Yes

CVE: CVE-2014-3627

CWE: CWE-59

CVSS Base Score: 5/10

Impact Subscore: 2.9/10

Exploitability Subscore: 10/10

Exploit range: Remote

Attack complexity: Low

Authentication: No required

Confidentiality impact: Partial

Integrity impact: None

Availability impact: None

Apologies for the delay in getting this across to you, Apache Hadoop 2.5.2
(released on 11/19) fixes the following security issue:
--
CVE-2014-3627: Apache Hadoop distributed cache vulnerability
Severity: Severe
Vendor: The Apache Software Foundation
Versions Affected:
Hadoop 0.23.0 to 0.23.11
Hadoop 2.0.0 to 2.5.1
Users affected: Users running the YARN NodeManager daemon with Kerberos
authentication
Impact: Vulnerability allows a cluster user to expose private files owned
by the user running the YARN NodeManager process. The malicious cluster
user can create a public tar archive containing a symlink to a local file
on the node owned by the user running the YARN NodeManager process. The
permissions of the local file will be changed to be world-readable when the
public archive is localized on the node.
Mitigation: Users should upgrade to 2.5.2.
Credit: This issue was discovered by Jason Lowe of Yahoo!

See this note in RAW Version

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Apache Hadoop 2.5.1 symlink attack

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