National Vulnerability Database (NVD) National Vulnerability Database (CVE-2009-1215)

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NVD is the U.S. government repository of standards based vulnerability management data. This data enables automation of vulnerability management, security measurement, and compliance (e.g. FISMA).

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NVD contains:

CVE Vulnerabilities: 56393
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CPE Names: 73033

Last updated: Tue May 21 17:29:34 EDT 2013

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Vulnerability Summary for CVE-2009-1215

Original release date:04/01/2009

Last revised:05/13/2009

Source: US-CERT/NIST

Overview

Race condition in GNU screen 4.0.3 allows local users to create or overwrite arbitrary files via a symlink attack on the /tmp/screen-exchange temporary file.

Impact

CVSS Severity (version 2.0):

CVSS v2 Base Score:1.9 (LOW) (AV:L/AC:M/Au:N/C:N/I:P/A:N) (legend)

Impact Subscore: 2.9

Exploitability Subscore: 3.4

CVSS Version 2 Metrics:

Access Vector: Locally exploitable

Access Complexity: Medium

Authentication: Not required to exploit

Impact Type:Allows unauthorized modification

Vendor Statements (disclaimer)

Official Statement from Red Hat (04/02/2009)

Red Hat does not consider this to be a security issue. The checks implemented by screen to protect against race condition attacks on /tmp/screen-exchange file provide sufficient protection for this rarely-used buffer exchange feature. For more details, see https://bugzilla.redhat.com/show_bug.cgi?id=492104

References to Advisories, Solutions, and Tools

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External Source: CONFIRM

Name: https://bugzilla.redhat.com/show_bug.cgi?id=492104

Hyperlink:https://bugzilla.redhat.com/show_bug.cgi?id=492104

External Source: CONFIRM

Name: https://bugs.launchpad.net/ubuntu/+source/screen/+bug/315993

Hyperlink:https://bugs.launchpad.net/ubuntu/+source/screen/+bug/315993

External Source: XF

Name: screen-screenexchange-symlink(49887)

Hyperlink:http://xforce.iss.net/xforce/xfdb/49887

External Source: BID

Name: 34521

Hyperlink:http://www.securityfocus.com/bid/34521