CVE-2009-4055

Exp

rtp.c in Asterisk Open Source 1.2.x before 1.2.37, 1.4.x before 1.4.27.1, 1.6.0.x before 1.6.0.19, and 1.6.1.x before 1.6.1.11; Business Edition B.x.x before B.2.5.13, C.2.x.x before C.2.4.6, and C.3.x.x before C.3.2.3; and s800i 1.3.x before 1.3.0.6 allows remote attackers to cause a denial of service (daemon crash) via an RTP comfort noise payload with a long data length.

Published: 2009-12-02 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-4055 is rated High Exploit Risk (67/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.83%). 5 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +2.31% over the last day, indicating growing attacker interest. 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-2009-4055

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

Exploit prediction scoring system (EPSS) score for CVE-2009-4055

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 0.52% 2.83% +2.31%
2 2025-08-20 0.45% 0.52% +0.07%
3 2025-05-23 — 0.45% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-4055

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2009-4055

OS Trackers for CVE-2009-4055

vendor priority summary link
debian not yet assigned CVE-2009-4055 not yet assigned priority: Debian including 1 source packages (asterisk), 2 status rows across 2 suites (bullseye, sid): resolved 2. https://security-tracker.debian.org/tracker/CVE-2009-4055
gentoo normal CVE-2009-4055: 1 GLSA(s) (201006-20), 1 atom(s) (net-misc/asterisk); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2009-4055
ubuntu medium CVE-2009-4055 medium priority: Ubuntu including 1 source packages (asterisk), 9 status rows across 9 suites (dapper, hardy, intrepid, jaunty, karmic, lucid, maverick, natty, upstream): ignored 4, not-affected 3, released 2. https://ubuntu.com/security/CVE-2009-4055

Affected software / configurations for CVE-2009-4055

Vendor Product Version Raw CPE
digium asterisk 1.2.0 cpe:2.3:a:digium:asterisk:1.2.0:*:*:*:*:*:*:*
digium asterisk 1.2.0 cpe:2.3:a:digium:asterisk:1.2.0:beta1:*:*:*:*:*:*
digium asterisk 1.2.0 cpe:2.3:a:digium:asterisk:1.2.0:beta2:*:*:*:*:*:*
digium asterisk 1.2.0 cpe:2.3:a:digium:asterisk:1.2.0:rc1:*:*:*:*:*:*
digium asterisk 1.2.0 cpe:2.3:a:digium:asterisk:1.2.0:rc2:*:*:*:*:*:*
digium asterisk 1.2.1 cpe:2.3:a:digium:asterisk:1.2.1:*:*:*:*:*:*:*
digium asterisk 1.2.2 cpe:2.3:a:digium:asterisk:1.2.2:*:*:*:*:*:*:*
digium asterisk 1.2.2 cpe:2.3:a:digium:asterisk:1.2.2:netsec:*:*:*:*:*:*
digium asterisk 1.2.3 cpe:2.3:a:digium:asterisk:1.2.3:*:*:*:*:*:*:*
digium asterisk 1.2.3 cpe:2.3:a:digium:asterisk:1.2.3:netsec:*:*:*:*:*:*
digium asterisk 1.2.10 cpe:2.3:a:digium:asterisk:1.2.10:*:*:*:*:*:*:*
digium asterisk 1.2.10 cpe:2.3:a:digium:asterisk:1.2.10:netsec:*:*:*:*:*:*
digium asterisk 1.2.11 cpe:2.3:a:digium:asterisk:1.2.11:*:*:*:*:*:*:*
digium asterisk 1.2.11 cpe:2.3:a:digium:asterisk:1.2.11:netsec:*:*:*:*:*:*
digium asterisk 1.2.12 cpe:2.3:a:digium:asterisk:1.2.12:*:*:*:*:*:*:*
digium asterisk 1.2.12 cpe:2.3:a:digium:asterisk:1.2.12:netsec:*:*:*:*:*:*
digium asterisk 1.2.12.1 cpe:2.3:a:digium:asterisk:1.2.12.1:*:*:*:*:*:*:*
digium asterisk 1.2.12.1 cpe:2.3:a:digium:asterisk:1.2.12.1:netsec:*:*:*:*:*:*
digium asterisk 1.2.13 cpe:2.3:a:digium:asterisk:1.2.13:*:*:*:*:*:*:*
digium asterisk 1.2.13 cpe:2.3:a:digium:asterisk:1.2.13:netsec:*:*:*:*:*:*
digium asterisk 1.2.14 cpe:2.3:a:digium:asterisk:1.2.14:*:*:*:*:*:*:*
digium asterisk 1.2.15 cpe:2.3:a:digium:asterisk:1.2.15:*:*:*:*:*:*:*
digium asterisk 1.2.15 cpe:2.3:a:digium:asterisk:1.2.15:netsec:*:*:*:*:*:*
digium asterisk 1.2.16 cpe:2.3:a:digium:asterisk:1.2.16:*:*:*:*:*:*:*
digium asterisk 1.2.16 cpe:2.3:a:digium:asterisk:1.2.16:netsec:*:*:*:*:*:*
digium asterisk 1.2.17 cpe:2.3:a:digium:asterisk:1.2.17:*:*:*:*:*:*:*
digium asterisk 1.2.17 cpe:2.3:a:digium:asterisk:1.2.17:netsec:*:*:*:*:*:*
digium asterisk 1.2.18 cpe:2.3:a:digium:asterisk:1.2.18:*:*:*:*:*:*:*
digium asterisk 1.2.18 cpe:2.3:a:digium:asterisk:1.2.18:netsec:*:*:*:*:*:*
digium asterisk 1.2.19 cpe:2.3:a:digium:asterisk:1.2.19:*:*:*:*:*:*:*
digium asterisk 1.2.19 cpe:2.3:a:digium:asterisk:1.2.19:netsec:*:*:*:*:*:*
digium asterisk 1.2.20 cpe:2.3:a:digium:asterisk:1.2.20:*:*:*:*:*:*:*
digium asterisk 1.2.20 cpe:2.3:a:digium:asterisk:1.2.20:netsec:*:*:*:*:*:*
digium asterisk 1.2.21 cpe:2.3:a:digium:asterisk:1.2.21:*:*:*:*:*:*:*
digium asterisk 1.2.21 cpe:2.3:a:digium:asterisk:1.2.21:netsec:*:*:*:*:*:*
digium asterisk 1.2.21.1 cpe:2.3:a:digium:asterisk:1.2.21.1:*:*:*:*:*:*:*
digium asterisk 1.2.21.1 cpe:2.3:a:digium:asterisk:1.2.21.1:netsec:*:*:*:*:*:*
digium asterisk 1.2.22 cpe:2.3:a:digium:asterisk:1.2.22:*:*:*:*:*:*:*
digium asterisk 1.2.22 cpe:2.3:a:digium:asterisk:1.2.22:netsec:*:*:*:*:*:*
digium asterisk 1.2.23 cpe:2.3:a:digium:asterisk:1.2.23:*:*:*:*:*:*:*
digium asterisk 1.2.23 cpe:2.3:a:digium:asterisk:1.2.23:netsec:*:*:*:*:*:*
digium asterisk 1.2.24 cpe:2.3:a:digium:asterisk:1.2.24:*:*:*:*:*:*:*
digium asterisk 1.2.24 cpe:2.3:a:digium:asterisk:1.2.24:netsec:*:*:*:*:*:*
digium asterisk 1.2.25 cpe:2.3:a:digium:asterisk:1.2.25:*:*:*:*:*:*:*
digium asterisk 1.2.25 cpe:2.3:a:digium:asterisk:1.2.25:netsec:*:*:*:*:*:*
digium asterisk 1.2.26 cpe:2.3:a:digium:asterisk:1.2.26:*:*:*:*:*:*:*
digium asterisk 1.2.26 cpe:2.3:a:digium:asterisk:1.2.26:netsec:*:*:*:*:*:*
digium asterisk 1.2.26.1 cpe:2.3:a:digium:asterisk:1.2.26.1:*:*:*:*:*:*:*
digium asterisk 1.2.26.1 cpe:2.3:a:digium:asterisk:1.2.26.1:netsec:*:*:*:*:*:*
digium asterisk 1.2.26.2 cpe:2.3:a:digium:asterisk:1.2.26.2:*:*:*:*:*:*:*
digium asterisk 1.2.26.2 cpe:2.3:a:digium:asterisk:1.2.26.2:netsec:*:*:*:*:*:*
digium asterisk 1.2.27 cpe:2.3:a:digium:asterisk:1.2.27:*:*:*:*:*:*:*
digium asterisk 1.2.28 cpe:2.3:a:digium:asterisk:1.2.28:*:*:*:*:*:*:*
digium asterisk 1.2.28.1 cpe:2.3:a:digium:asterisk:1.2.28.1:*:*:*:*:*:*:*
digium asterisk 1.2.29 cpe:2.3:a:digium:asterisk:1.2.29:*:*:*:*:*:*:*
digium asterisk 1.2.30 cpe:2.3:a:digium:asterisk:1.2.30:*:*:*:*:*:*:*
digium asterisk 1.2.30.1 cpe:2.3:a:digium:asterisk:1.2.30.1:*:*:*:*:*:*:*
digium asterisk 1.2.30.2 cpe:2.3:a:digium:asterisk:1.2.30.2:*:*:*:*:*:*:*
digium asterisk 1.2.30.3 cpe:2.3:a:digium:asterisk:1.2.30.3:*:*:*:*:*:*:*
digium asterisk 1.2.30.4 cpe:2.3:a:digium:asterisk:1.2.30.4:*:*:*:*:*:*:*
digium asterisk 1.2.31 cpe:2.3:a:digium:asterisk:1.2.31:*:*:*:*:*:*:*
digium asterisk 1.2.31.1 cpe:2.3:a:digium:asterisk:1.2.31.1:*:*:*:*:*:*:*
digium asterisk 1.2.32 cpe:2.3:a:digium:asterisk:1.2.32:*:*:*:*:*:*:*
digium asterisk 1.2.33 cpe:2.3:a:digium:asterisk:1.2.33:*:*:*:*:*:*:*
digium asterisk 1.2.34 cpe:2.3:a:digium:asterisk:1.2.34:*:*:*:*:*:*:*
digium asterisk 1.2.35 cpe:2.3:a:digium:asterisk:1.2.35:*:*:*:*:*:*:*
digium asterisk 1.2.36 cpe:2.3:a:digium:asterisk:1.2.36:*:*:*:*:*:*:*
digium asterisk 1.4.0 cpe:2.3:a:digium:asterisk:1.4.0:*:*:*:*:*:*:*
digium asterisk 1.4.0 cpe:2.3:a:digium:asterisk:1.4.0:beta1:*:*:*:*:*:*
digium asterisk 1.4.0 cpe:2.3:a:digium:asterisk:1.4.0:beta2:*:*:*:*:*:*
digium asterisk 1.4.0 cpe:2.3:a:digium:asterisk:1.4.0:beta3:*:*:*:*:*:*
digium asterisk 1.4.0 cpe:2.3:a:digium:asterisk:1.4.0:beta4:*:*:*:*:*:*
digium asterisk 1.4.1 cpe:2.3:a:digium:asterisk:1.4.1:*:*:*:*:*:*:*
digium asterisk 1.4.2 cpe:2.3:a:digium:asterisk:1.4.2:*:*:*:*:*:*:*
digium asterisk 1.4.3 cpe:2.3:a:digium:asterisk:1.4.3:*:*:*:*:*:*:*
digium asterisk 1.4.4 cpe:2.3:a:digium:asterisk:1.4.4:*:*:*:*:*:*:*
digium asterisk 1.4.5 cpe:2.3:a:digium:asterisk:1.4.5:*:*:*:*:*:*:*
digium asterisk 1.4.6 cpe:2.3:a:digium:asterisk:1.4.6:*:*:*:*:*:*:*
digium asterisk 1.4.7 cpe:2.3:a:digium:asterisk:1.4.7:*:*:*:*:*:*:*
digium asterisk 1.4.7.1 cpe:2.3:a:digium:asterisk:1.4.7.1:*:*:*:*:*:*:*

References for CVE-2009-4055

URL Tags
http://downloads.asterisk.org/pub/security/AST-2009-010-1.2.diff.txt Exploit
http://downloads.asterisk.org/pub/security/AST-2009-010-1.4.diff.txt Exploit
http://downloads.asterisk.org/pub/security/AST-2009-010-1.6.0.diff.txt Exploit
http://downloads.asterisk.org/pub/security/AST-2009-010-1.6.1.diff.txt Exploit
http://downloads.digium.com/pub/security/AST-2009-010.html Vendor Advisory
http://secunia.com/advisories/37530 Exploit Vendor Advisory
http://secunia.com/advisories/37677
http://secunia.com/advisories/37708
http://securitytracker.com/id?1023249
http://www.debian.org/security/2009/dsa-1952
http://www.osvdb.org/60569
http://www.redhat.com/archives/fedora-package-announce/2009-December/msg00759.html
http://www.securityfocus.com/archive/1/508147/100/0/threaded
http://www.securityfocus.com/bid/37153
http://www.vupen.com/english/advisories/2009/3368 Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/54471
https://issues.asterisk.org/view.php?id=16242
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