CVE-2015-1558

CVE-2015-1558 is a low-severity vulnerability in Digium Asterisk with a CVSS 2.0 base score of 3.5. 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: Low (CVSS 2.0 base score 3.5)
• EPSS exploit prediction: 3% (86th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-399
• Affected product: Digium Asterisk
• Published: 2015-02-09
• Last modified: 2026-06-17

Description

Asterisk Open Source 12.x before 12.8.1 and 13.x before 13.1.1, when using the PJSIP channel driver, does not properly reclaim RTP ports, which allows remote authenticated users to cause a denial of service (file descriptor consumption) via an SDP offer containing only incompatible codecs.

Frequently asked questions

What is CVE-2015-1558?

Asterisk Open Source 12.x before 12.8.1 and 13.x before 13.1.1, when using the PJSIP channel driver, does not properly reclaim RTP ports, which allows remote authenticated users to cause a denial of service (file descriptor consumption) via an SDP offer containing only incompatible codecs.

How severe is CVE-2015-1558?

CVE-2015-1558 has a CVSS 2.0 base score of 3.5, rated low severity.

Is CVE-2015-1558 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-1558?

CVE-2015-1558 primarily affects Digium Asterisk. In total, 34 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-1558?

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

When was CVE-2015-1558 published?

CVE-2015-1558 was published on 2015-02-09 and last updated on 2026-06-17.

References

• http://downloads.asterisk.org/pub/security/AST-2015-001.html
• http://seclists.org/fulldisclosure/2015/Jan/116
• http://www.securityfocus.com/archive/1/534573/100/0/threaded
• http://www.securitytracker.com/id/1031661

Affected products (34)

• cpe:2.3:a:digium:asterisk:12.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.1.0:-:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.1.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.1.0:rc2:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.1.0:rc3:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.2.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.2.0:rc2:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.2.0:rc3:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.3.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.3.0:rc2:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.3.1:*:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.3.2:*:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.4.0:*:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.4.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.5.0:*:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.5.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.6.0:*:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.6.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.7.0:*:*:*:lts:*:*:*
• cpe:2.3:a:digium:asterisk:12.7.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.7.0:rc2:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.8.0:*:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.8.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.8.0:rc2:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:12.8.1:*:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:13.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:13.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:13.1.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:13.1.0:rc2:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:13.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:digium:asterisk:13.2.0:rc1:*:*:*:*:*:*

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Other CWE-399 (Resource Management Errors) vulnerabilities

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• CVE-2015-0335 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
• CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
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