How severe is CVE-2012-4737?

CVE-2012-4737 has a CVSS 2.0 base score of 6.0, rated medium severity.

Is CVE-2012-4737 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-4737?

CVE-2012-4737 primarily affects Digium Asterisk. In total, 144 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-4737?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2012-4737 published?

CVE-2012-4737 was published on 2012-08-31 and last updated on 2026-06-16.

CVE-2012-4737

CVE-2012-4737 is a medium-severity vulnerability in Digium Asterisk with a CVSS 2.0 base score of 6.0. 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-264.

Key facts

Severity: Medium (CVSS 2.0 base score 6.0)
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Digium Asterisk
Published: 2012-08-31
Last modified: 2026-06-16

Description

channels/chan_iax2.c in Asterisk Open Source 1.8.x before 1.8.15.1 and 10.x before 10.7.1, Certified Asterisk 1.8.11 before 1.8.11-cert7, Asterisk Digiumphones 10.x.x-digiumphones before 10.7.1-digiumphones, and Asterisk Business Edition C.3.x before C.3.7.6 does not enforce ACL rules during certain uses of peer credentials, which allows remote authenticated users to bypass intended outbound-call restrictions by leveraging the availability of these credentials.

Frequently asked questions

What is CVE-2012-4737?: channels/chan_iax2.c in Asterisk Open Source 1.8.x before 1.8.15.1 and 10.x before 10.7.1, Certified Asterisk 1.8.11 before 1.8.11-cert7, Asterisk Digiumphones 10.x.x-digiumphones before 10.7.1-digiumphones, and Asterisk Business Edition C.3.x before C.3.7.6 does not enforce ACL rules during certain uses of peer credentials, which allows remote authenticated users to bypass intended outbound-call restrictions by leveraging the availability of these credentials.
How severe is CVE-2012-4737?: CVE-2012-4737 has a CVSS 2.0 base score of 6.0, rated medium severity.
Is CVE-2012-4737 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-4737?: CVE-2012-4737 primarily affects Digium Asterisk. In total, 144 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-4737?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-4737 published?: CVE-2012-4737 was published on 2012-08-31 and last updated on 2026-06-16.

References

Affected products (144)

cpe:2.3:a:digium:asterisk:1.8.0:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.0:beta1:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.0:beta2:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.0:beta3:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.0:beta4:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.0:beta5:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.0:rc2:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.0:rc3:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.0:rc4:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.0:rc5:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.1:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.1:rc1:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.1.1:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.1.2:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.2:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.2.1:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.2.2:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.2.3:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.2.4:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.3:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.3:rc1:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.3:rc2:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.3:rc3:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.3.1:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.3.2:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.3.3:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.4:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.4:rc1:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.4:rc2:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.4:rc3:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.4.1:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.4.2:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.4.3:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.4.4:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.5:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.5:rc1:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.5.0:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.6.0:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.6.0:rc1:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.8.6.0:rc2:*:*:*:*:*:*

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