How severe is CVE-2009-2346?

CVE-2009-2346 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2009-2346 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-2346?

CVE-2009-2346 primarily affects Asterisk. In total, 192 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-2346?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2009-2346 published?

CVE-2009-2346 was published on 2009-09-08 and last updated on 2026-06-16.

CVE-2009-2346

CVE-2009-2346 is a high-severity vulnerability in Asterisk with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Asterisk
Published: 2009-09-08
Last modified: 2026-06-16

Description

The IAX2 protocol implementation in Asterisk Open Source 1.2.x before 1.2.35, 1.4.x before 1.4.26.2, 1.6.0.x before 1.6.0.15, and 1.6.1.x before 1.6.1.6; Business Edition B.x.x before B.2.5.10, C.2.x before C.2.4.3, and C.3.x before C.3.1.1; and s800i 1.3.x before 1.3.0.3 allows remote attackers to cause a denial of service (call-number exhaustion) by initiating many IAX2 message exchanges, a related issue to CVE-2008-3263.

Frequently asked questions

What is CVE-2009-2346?: The IAX2 protocol implementation in Asterisk Open Source 1.2.x before 1.2.35, 1.4.x before 1.4.26.2, 1.6.0.x before 1.6.0.15, and 1.6.1.x before 1.6.1.6; Business Edition B.x.x before B.2.5.10, C.2.x before C.2.4.3, and C.3.x before C.3.1.1; and s800i 1.3.x before 1.3.0.3 allows remote attackers to cause a denial of service (call-number exhaustion) by initiating many IAX2 message exchanges, a related issue to CVE-2008-3263.
How severe is CVE-2009-2346?: CVE-2009-2346 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2009-2346 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-2346?: CVE-2009-2346 primarily affects Asterisk. In total, 192 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-2346?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2009-2346 published?: CVE-2009-2346 was published on 2009-09-08 and last updated on 2026-06-16.

References

Affected products (192)

cpe:2.3:a:asterisk:asterisk:b.1.3.2:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:b.1.3.3:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:b.2.2.0:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:b.2.2.1:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:b.2.3.1:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:b.2.3.2:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:b.2.3.3:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:b.2.3.4:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:b.2.3.5:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:b.2.3.6:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:b.2.5.1:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:b.2.5.3:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:b.2.5.4:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:b.2.5.5:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:b.2.5.6:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:b.2.5.8:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:b.2.5.9:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:c.1.0_beta7:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:c.1.0_beta8:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:c.1.6:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:c.1.6.1:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:c.1.6.2:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:c.1.8.1:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:c.1.10.3:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:c.1.10.4:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:c.1.10.5:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:c.2.1.2.1:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:c.2.3:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:c.2.3.3:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:c.2.4.2:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk:c.3.1.0:*:business:*:*:*:*:*
cpe:2.3:a:asterisk:open_source:1.2.0:*:*:*:*:*:*:*
cpe:2.3:a:asterisk:open_source:1.2.0:beta1:*:*:*:*:*:*
cpe:2.3:a:asterisk:open_source:1.2.0:beta2:*:*:*:*:*:*
cpe:2.3:a:asterisk:open_source:1.2.0:rc1:*:*:*:*:*:*
cpe:2.3:a:asterisk:open_source:1.2.0:rc2:*:*:*:*:*:*
cpe:2.3:a:asterisk:open_source:1.2.1:*:*:*:*:*:*:*
cpe:2.3:a:asterisk:open_source:1.2.2:*:*:*:*:*:*:*
cpe:2.3:a:asterisk:open_source:1.2.2:netsec:*:*:*:*:*:*
cpe:2.3:a:asterisk:open_source:1.2.3:*:*:*:*:*:*:*

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