CVE-2009-0871 — asterisk: remote crash in SIP channel driver (AST-2009-002)

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LOW

asterisk: remote crash in SIP channel driver (AST-2009-002)

Published Mar 11, 2009

3.5

LOW

CVSS 2.0

EPSS 2.57%

Description

The SIP channel driver in Asterisk Open Source 1.4.22, 1.4.23, and 1.4.23.1; 1.6.0 before 1.6.0.6; 1.6.1 before 1.6.1.0-rc2; and Asterisk Business Edition C.2.3, with the pedantic option enabled, allows remote authenticated users to cause a denial of service (crash) via a SIP INVITE request without any headers, which triggers a NULL pointer dereference in the (1) sip_uri_headers_cmp and (2) sip_uri_params_cmp functions.

Affected products

Remediation

No remediation recorded yet.

Metrics

2.57% 0.02569

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.02569

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (14 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	2.57% (0.02569)	84.60th	v5 (v2026.06.15)
Jun 15, 2026	2.57% (0.02569)	83.07th	v5 (v2026.06.15)
Mar 30, 2025	2.64% (0.02639)	84.39th	v4 (v2025.03.14)
Mar 29, 2025	21.45% (0.21449)	93.00th	v4 (v2025.03.14)
Mar 17, 2025	2.64% (0.02639)	84.70th	v4 (v2025.03.14)
Dec 12, 2024	2.51% (0.02514)	90.53th	v3 (v2023.03.01)
Jul 8, 2024	2.51% (0.02514)	90.24th	v3 (v2023.03.01)
Jun 4, 2024	2.33% (0.02332)	89.75th	v3 (v2023.03.01)
Apr 29, 2023	2.51% (0.02515)	88.56th	v3 (v2023.03.01)
Mar 7, 2023	2.52% (0.02524)	88.48th	v3 (v2023.03.01)
Mar 6, 2023	1.65% (0.01649)	75.99th	v2 (v2022.01.01)
Feb 23, 2023	1.65% (0.01649)	75.95th	v2 (v2022.01.01)
Apr 1, 2022	1.65% (0.01649)	73.90th	v2 (v2022.01.01)
Feb 4, 2022	1.65% (0.01649)	52.77th	v2 (v2022.01.01)

Weaknesses (1)

CWE-20

Improper Input Validation

References (13)

http://bugs.digium.com/view.php?id=13547
x_refsource_CONFIRM
http://bugs.digium.com/view.php?id=14417
x_refsource_CONFIRM
http://downloads.digium.com/pub/security/AST-2009-002.html
x_refsource_CONFIRMPatchVendor Advisory
http://osvdb.org/52568
vdb-entryx_refsource_OSVDB
http://secunia.com/advisories/34229
third-party-advisoryx_refsource_SECUNIAVendor Advisory
http://www.securityfocus.com/archive/1/501656/100/0/threaded
mailing-listx_refsource_BUGTRAQ
http://www.securityfocus.com/bid/34070
vdb-entryx_refsource_BIDPatch
http://www.securitytracker.com/id?1021834
vdb-entryx_refsource_SECTRACK
http://www.vupen.com/english/advisories/2009/0667
vdb-entryx_refsource_VUPEN
https://access.redhat.com/security/cve/CVE-2009-0871
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=489725
Issue Tracking
https://nvd.nist.gov/vuln/detail/CVE-2009-0871
https://www.cve.org/CVERecord?id=CVE-2009-0871

Link	Providers	Tags
http://bugs.digium.com/view.php?id=13547		x_refsource_CONFIRM
http://bugs.digium.com/view.php?id=14417		x_refsource_CONFIRM
http://downloads.digium.com/pub/security/AST-2009-002.html		x_refsource_CONFIRMPatchVendor Advisory
http://osvdb.org/52568		vdb-entryx_refsource_OSVDB
http://secunia.com/advisories/34229		third-party-advisoryx_refsource_SECUNIAVendor Advisory
http://www.securityfocus.com/archive/1/501656/100/0/threaded		mailing-listx_refsource_BUGTRAQ
http://www.securityfocus.com/bid/34070		vdb-entryx_refsource_BIDPatch
http://www.securitytracker.com/id?1021834		vdb-entryx_refsource_SECTRACK
http://www.vupen.com/english/advisories/2009/0667		vdb-entryx_refsource_VUPEN
https://access.redhat.com/security/cve/CVE-2009-0871		Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=489725		Issue Tracking
https://nvd.nist.gov/vuln/detail/CVE-2009-0871
https://www.cve.org/CVERecord?id=CVE-2009-0871