CVE-2013-4256

Exp

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.

Published: 2013-10-09 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-4256 is rated Exploit Available (50.8/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.70%). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2013-4256

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2013-4256

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.15% 0.70% +0.55%
2 2025-11-30 0.06% 0.15% +0.09%
3 2024-12-17 — 0.06% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-4256

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.6 2.0 MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.9 6.4 [email protected]

Weakness enumeration for CVE-2013-4256

OS Trackers for CVE-2013-4256

vendor priority summary link
debian not yet assigned CVE-2013-4256 not yet assigned priority: Debian including 1 source packages (nas), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2013-4256
gentoo normal CVE-2013-4256: 1 GLSA(s) (201406-22), 1 atom(s) (media-libs/nas); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2013-4256
ubuntu medium CVE-2013-4256 medium priority: Ubuntu including 1 source packages (nas), 5 status rows across 5 suites (lucid, precise, quantal, raring, upstream): released 3, ignored 1, needed 1. https://ubuntu.com/security/CVE-2013-4256

Affected software / configurations for CVE-2013-4256

Vendor Product Version Raw CPE
canonical ubuntu_linux 12.04 cpe:2.3:o:canonical:ubuntu_linux:12.04:-:lts:*:*:*:*:*
canonical ubuntu_linux 12.10 cpe:2.3:o:canonical:ubuntu_linux:12.10:*:*:*:*:*:*:*
canonical ubuntu_linux 13.04 cpe:2.3:o:canonical:ubuntu_linux:13.04:*:*:*:*:*:*:*
radscan network_audio_system 1.9.3 cpe:2.3:a:radscan:network_audio_system:1.9.3:*:*:*:*:*:*:*

References for CVE-2013-4256

cvelogic Threat Intelligence