How severe is CVE-2013-1864?

CVE-2013-1864 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2013-1864 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-1864?

CVE-2013-1864 primarily affects Opalvoip Portable Tool Library. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-1864?

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

When was CVE-2013-1864 published?

CVE-2013-1864 was published on 2014-05-23 and last updated on 2026-06-16.

CVE-2013-1864

CVE-2013-1864 is a medium-severity vulnerability in Opalvoip Portable Tool Library with a CVSS 2.0 base score of 4.3. 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: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Opalvoip Portable Tool Library
Published: 2014-05-23
Last modified: 2026-06-16

Description

The Portable Tool Library (aka PTLib) before 2.10.10, as used in Ekiga before 4.0.1, does not properly detect recursion during entity expansion, which allows remote attackers to cause a denial of service (memory and CPU consumption) via a crafted PXML document containing a large number of nested entity references, aka a "billion laughs attack."

Frequently asked questions

What is CVE-2013-1864?: The Portable Tool Library (aka PTLib) before 2.10.10, as used in Ekiga before 4.0.1, does not properly detect recursion during entity expansion, which allows remote attackers to cause a denial of service (memory and CPU consumption) via a crafted PXML document containing a large number of nested entity references, aka a "billion laughs attack."
How severe is CVE-2013-1864?: CVE-2013-1864 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2013-1864 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-1864?: CVE-2013-1864 primarily affects Opalvoip Portable Tool Library. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-1864?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-1864 published?: CVE-2013-1864 was published on 2014-05-23 and last updated on 2026-06-16.

References

Affected products (7)

cpe:2.3:a:opalvoip:portable_tool_library:2.10.1:*:*:*:*:*:*:*
cpe:2.3:a:opalvoip:portable_tool_library:2.10.2:*:*:*:*:*:*:*
cpe:2.3:a:opalvoip:portable_tool_library:2.10.7:*:*:*:*:*:*:*
cpe:2.3:a:opalvoip:portable_tool_library:2.10.9:*:*:*:*:*:*:*
cpe:2.3:a:ekiga:ekiga:*:*:*:*:*:*:*:*
cpe:2.3:a:suse:suse_linux_enterprise_software_development_kit:11.0:sp3:*:*:*:*:*:*
cpe:2.3:o:suse:suse_linux_enterprise_desktop:11.0:sp3:*:*:*:*:*:*

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