How severe is CVE-2012-2947?

CVE-2012-2947 has a CVSS 2.0 base score of 2.6, rated low severity.

Is CVE-2012-2947 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-2947?

CVE-2012-2947 primarily affects Digium Asterisk. In total, 105 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-2947?

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

When was CVE-2012-2947 published?

CVE-2012-2947 was published on 2012-06-02 and last updated on 2026-06-16.

CVE-2012-2947

CVE-2012-2947 is a low-severity vulnerability in Digium Asterisk with a CVSS 2.0 base score of 2.6. 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-284.

Key facts

Severity: Low (CVSS 2.0 base score 2.6)
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Digium Asterisk
Published: 2012-06-02
Last modified: 2026-06-16

Description

chan_iax2.c in the IAX2 channel driver in Certified Asterisk 1.8.11-cert before 1.8.11-cert2 and Asterisk Open Source 1.8.x before 1.8.12.1 and 10.x before 10.4.1, when a certain mohinterpret setting is enabled, allows remote attackers to cause a denial of service (daemon crash) by placing a call on hold.

Frequently asked questions

What is CVE-2012-2947?: chan_iax2.c in the IAX2 channel driver in Certified Asterisk 1.8.11-cert before 1.8.11-cert2 and Asterisk Open Source 1.8.x before 1.8.12.1 and 10.x before 10.4.1, when a certain mohinterpret setting is enabled, allows remote attackers to cause a denial of service (daemon crash) by placing a call on hold.
How severe is CVE-2012-2947?: CVE-2012-2947 has a CVSS 2.0 base score of 2.6, rated low severity.
Is CVE-2012-2947 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-2947?: CVE-2012-2947 primarily affects Digium Asterisk. In total, 105 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-2947?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-2947 published?: CVE-2012-2947 was published on 2012-06-02 and last updated on 2026-06-16.

References

Affected products (105)

cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*
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:*:*:*:*:*:*

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