CVE-2013-1864

Exp

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."

Published: 2014-05-23 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-1864 is rated High Exploit Risk (61.2/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.73%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2013-1864

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2013-1864

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-08-19 3.60% 2.73% -0.87%
2 2025-07-13 3.82% 3.60% -0.22%
3 2025-03-30 — 3.82% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-1864

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2013-1864

OS Trackers for CVE-2013-1864

vendor priority summary link
redhat low — https://access.redhat.com/security/cve/CVE-2013-1864
ubuntu medium CVE-2013-1864 medium priority: Ubuntu including 2 source packages (ptlib, pwlib), 30 status rows across 15 suites (hardy, lucid, oneiric, precise, quantal, raring, saucy, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): DNE 12, ignored 8, not-affected 8, needs-triage 2. https://ubuntu.com/security/CVE-2013-1864

Affected software / configurations for CVE-2013-1864

Vendor Product Version Raw CPE
opalvoip portable_tool_library 2.10.1 cpe:2.3:a:opalvoip:portable_tool_library:2.10.1:*:*:*:*:*:*:*
opalvoip portable_tool_library 2.10.2 cpe:2.3:a:opalvoip:portable_tool_library:2.10.2:*:*:*:*:*:*:*
opalvoip portable_tool_library 2.10.7 cpe:2.3:a:opalvoip:portable_tool_library:2.10.7:*:*:*:*:*:*:*
opalvoip portable_tool_library 2.10.9 cpe:2.3:a:opalvoip:portable_tool_library:2.10.9:*:*:*:*:*:*:*
ekiga ekiga <= 4.0.0 cpe:2.3:a:ekiga:ekiga:*:*:*:*:*:*:*:*
suse suse_linux_enterprise_software_development_kit 11.0 cpe:2.3:a:suse:suse_linux_enterprise_software_development_kit:11.0:sp3:*:*:*:*:*:*
suse suse_linux_enterprise_desktop 11.0 cpe:2.3:o:suse:suse_linux_enterprise_desktop:11.0:sp3:*:*:*:*:*:*

References for CVE-2013-1864

cvelogic Threat Intelligence