How severe is CVE-2008-2543?

CVE-2008-2543 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2008-2543 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-2543?

CVE-2008-2543 primarily affects Asterisk Asterisk-addons. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-2543?

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

When was CVE-2008-2543 published?

CVE-2008-2543 was published on 2008-06-05 and last updated on 2026-06-16.

CVE-2008-2543

CVE-2008-2543 is a medium-severity vulnerability in Asterisk Asterisk-addons with a CVSS 2.0 base score of 5.0. 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-399.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Asterisk Asterisk-addons
Published: 2008-06-05
Last modified: 2026-06-16

Description

The ooh323 channel driver in Asterisk Addons 1.2.x before 1.2.9 and Asterisk-Addons 1.4.x before 1.4.7 creates a remotely accessible TCP port that is intended solely for localhost communication, and interprets some TCP application-data fields as addresses of memory to free, which allows remote attackers to cause a denial of service (daemon crash) via crafted TCP packets.

Frequently asked questions

What is CVE-2008-2543?: The ooh323 channel driver in Asterisk Addons 1.2.x before 1.2.9 and Asterisk-Addons 1.4.x before 1.4.7 creates a remotely accessible TCP port that is intended solely for localhost communication, and interprets some TCP application-data fields as addresses of memory to free, which allows remote attackers to cause a denial of service (daemon crash) via crafted TCP packets.
How severe is CVE-2008-2543?: CVE-2008-2543 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2008-2543 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-2543?: CVE-2008-2543 primarily affects Asterisk Asterisk-addons. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-2543?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2008-2543 published?: CVE-2008-2543 was published on 2008-06-05 and last updated on 2026-06-16.

References

Affected products (16)

cpe:2.3:a:asterisk:asterisk-addons:1.2.0:*:*:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk-addons:1.2.1:*:*:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk-addons:1.2.2:*:*:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk-addons:1.2.3:*:*:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk-addons:1.2.4:*:*:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk-addons:1.2.5:*:*:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk-addons:1.2.6:*:*:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk-addons:1.2.7:*:*:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk-addons:1.2.8:*:*:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk-addons:1.4.0:*:*:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk-addons:1.4.1:*:*:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk-addons:1.4.2:*:*:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk-addons:1.4.3:*:*:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk-addons:1.4.4:*:*:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk-addons:1.4.5:*:*:*:*:*:*:*
cpe:2.3:a:asterisk:asterisk-addons:1.4.6:*:*:*:*:*:*:*

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