CVE-2014-3660

CVE-2014-3660 is a medium-severity vulnerability in Redhat Enterprise Linux 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.

Key facts

Description

parser.c in libxml2 before 2.9.2 does not properly prevent entity expansion even when entity substitution has been disabled, which allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted XML document containing a large number of nested entity references, a variant of the "billion laughs" attack.

Frequently asked questions

What is CVE-2014-3660?
parser.c in libxml2 before 2.9.2 does not properly prevent entity expansion even when entity substitution has been disabled, which allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted XML document containing a large number of nested entity references, a variant of the "billion laughs" attack.
How severe is CVE-2014-3660?
CVE-2014-3660 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2014-3660 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-3660?
CVE-2014-3660 primarily affects Redhat Enterprise Linux. In total, 116 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2014-3660?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2014-3660 published?
CVE-2014-3660 was published on 2014-11-04 and last updated on 2026-06-17.

References

Affected products (116)

More vulnerabilities in Redhat Enterprise Linux

All CVEs affecting Redhat Enterprise Linux →