Is CVE-2013-4256 being actively exploited?

CVE-2013-4256 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2013-4256?

CVE-2013-4256 has a CVSS 2.0 base score of 4.6 (MEDIUM).

CVE-2013-4256

MEDIUM · CVSS 4.6EPSS 0.7%EU EUVD

Multiple stack-based and heap-based buffer overflows in Network Audio System (NAS) 1.9.3 allow local users to cause a denial of service (crash) or possibly execute arbitrary code via the (1) display command argument to the ProcessCommandLine function in server/os/utils.c; (2) ResetHosts function in server/os/access.c; (3) open_unix_socket, (4) open_isc_local, (5) open_xsight_local, (6) open_att_local, or (7) open_att_svr4_local function in server/os/connection.c; the (8) AUDIOHOST environment variable to the CreateWellKnownSockets or (9) AmoebaTCPConnectorThread function in server/os/connection.c; or (10) unspecified vectors related to logging in the osLogMsg function in server/os/aulog.c.

Key facts

CVSS score: 4.6 (v2.0)
Severity: MEDIUM
CVSS vector: AV:L/AC:L/Au:N/C:P/I:P/A:P
Weakness (CWE): CWE-119
EPSS score: 0.7% (53th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2013-4158)
Published: October 9, 2013
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2013-4158 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
radscan / network audio system

References

http://radscan.com/pipermail/nas/2013-August/001270.html(Exploit)
http://sourceforge.net/p/nas/code/288(Exploit, Patch)
http://www.debian.org/security/2013/dsa-2771
http://www.openwall.com/lists/oss-security/2013/08/16/2(Patch)
http://www.openwall.com/lists/oss-security/2013/08/19/3(Patch)
http://www.securityfocus.com/bid/61848
http://www.ubuntu.com/usn/USN-1986-1(Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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