MEDIUM
libxml2: denial of service via recursive entity expansion
Published Nov 4, 2014
5.0
MEDIUMCVSS 2.0
EPSS 3.99%
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.
Affected products
No data.
Configuration 1
OR
- ≤ 2.9.1
- 2.0.0
- 2.1.0
- 2.1.1
- 2.2.0
- 2.2.0
- 2.2.1
- 2.2.2
- 2.2.3
- 2.2.4
- 2.2.5
- 2.2.6
- 2.2.7
- 2.2.8
- 2.2.9
- 2.2.10
- 2.2.11
- 2.3.0
- 2.3.1
- 2.3.2
- 2.3.3
- 2.3.4
- 2.3.5
- 2.3.6
- 2.3.7
- 2.3.8
- 2.3.9
- 2.3.10
- 2.3.11
- 2.3.12
- 2.3.13
- 2.3.14
- 2.4.1
- 2.4.2
- 2.4.3
- 2.4.4
- 2.4.5
- 2.4.6
- 2.4.7
- 2.4.8
- 2.4.9
- 2.4.10
- 2.4.11
- 2.4.12
- 2.4.13
- 2.4.14
- 2.4.15
- 2.4.16
- 2.4.17
- 2.4.18
- 2.4.19
- 2.4.20
- 2.4.21
- 2.4.22
- 2.4.23
- 2.4.24
- 2.4.25
- 2.4.26
- 2.4.27
- 2.4.28
- 2.4.29
- 2.4.30
- 2.5.0
- 2.5.4
- 2.5.7
- 2.5.8
- 2.5.10
- 2.5.11
- 2.6.0
- 2.6.1
- 2.6.2
- 2.6.3
- 2.6.4
- 2.6.5
- 2.6.6
- 2.6.7
- 2.6.8
- 2.6.9
- 2.6.11
- 2.6.12
- 2.6.13
- 2.6.14
- 2.6.16
- 2.6.17
- 2.6.18
- 2.6.20
- 2.6.21
- 2.6.22
- 2.6.23
- 2.6.24
- 2.6.25
- 2.6.26
- 2.6.27
- 2.6.28
- 2.6.29
- 2.6.30
- 2.6.31
- 2.6.32
- 2.7.0
- 2.7.1
- 2.7.2
- 2.7.3
- 2.7.4
- 2.7.5
- 2.7.6
- 2.7.7
- 2.7.8
- 2.8.0
- 2.9.0
- 2.9.0
Configuration 2
OR
- ≤ 10.10.4
- 10.04
- 12.04
- 14.04
- 7.0
- 5.0
No data.
Red Hat Enterprise Linux 5
libxml2-0:2.6.26-2.1.25.el5_11
Fixed · RHSA-2014:1885
Red Hat Enterprise Linux 6
libxml2-0:2.7.6-17.el6_6.1
Fixed · RHSA-2014:1655
Red Hat Enterprise Linux 7
libxml2-0:2.9.1-5.el7_0.1
Fixed · RHSA-2014:1655
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | libxml2-0:2.6.26-2.1.25.el5_11 | Fixed | RHSA-2014:1885 |
| Red Hat Enterprise Linux 6 | libxml2-0:2.7.6-17.el6_6.1 | Fixed | RHSA-2014:1655 |
| Red Hat Enterprise Linux 7 | libxml2-0:2.9.1-5.el7_0.1 | Fixed | RHSA-2014:1655 |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
3.99% 0.03988
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.03988
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.99% (0.03988) | 90.19th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.02% (0.04021) | 89.22th | v5 (v2026.06.15) |
| Dec 1, 2025 | 4.34% (0.04342) | 88.55th | v4 (v2025.03.14) |
| Aug 29, 2025 | 5.35% (0.05353) | 89.70th | v4 (v2025.03.14) |
| Apr 24, 2025 | 4.32% (0.04323) | 88.24th | v4 (v2025.03.14) |
| Mar 30, 2025 | 5.39% (0.05386) | 89.14th | v4 (v2025.03.14) |
| Mar 29, 2025 | 26.32% (0.26322) | 94.05th | v4 (v2025.03.14) |
| Mar 17, 2025 | 4.76% (0.04759) | 88.71th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.99% (0.00987) | 84.16th | v3 (v2023.03.01) |
| Jun 16, 2024 | 0.99% (0.00987) | 83.57th | v3 (v2023.03.01) |
| Apr 30, 2024 | 1.34% (0.01341) | 85.91th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.46% (0.01457) | 84.62th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.69% (0.02686) | 82.85th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.69% (0.02686) | 81.17th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.69% (0.02686) | 62.66th | v2 (v2022.01.01) |
Weaknesses (1)
References (26)
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705 x_refsource_CONFIRM
- http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html vendor-advisoryx_refsource_APPLE
- http://lists.apple.com/archives/security-announce/2015/Aug/msg00002.html vendor-advisoryx_refsource_APPLE
- http://lists.opensuse.org/opensuse-updates/2014-10/msg00034.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-updates/2015-12/msg00120.html vendor-advisoryx_refsource_SUSE
- http://rhn.redhat.com/errata/RHSA-2014-1655.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2014-1885.html vendor-advisoryx_refsource_REDHAT
- http://secunia.com/advisories/59903 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/61965 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/61966 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/61991 third-party-advisoryx_refsource_SECUNIA
- http://www.debian.org/security/2014/dsa-3057 vendor-advisoryx_refsource_DEBIAN
- http://www.mandriva.com/security/advisories?name=MDVSA-2014:244 vendor-advisoryx_refsource_MANDRIVA
- http://www.openwall.com/lists/oss-security/2014/10/17/7 mailing-listx_refsource_MLISTPatch
- http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html x_refsource_CONFIRM
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html x_refsource_CONFIRM
- http://www.securityfocus.com/bid/70644 vdb-entryx_refsource_BID
- http://www.ubuntu.com/usn/USN-2389-1 vendor-advisoryx_refsource_UBUNTUVendor Advisory
- https://access.redhat.com/security/cve/CVE-2014-3660 Vendor Advisory
- https://bugzilla.redhat.com/attachment.cgi?id=944444&action=diff x_refsource_MISC
- https://bugzilla.redhat.com/show_bug.cgi?id=1149084 x_refsource_CONFIRMIssue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2014-3660
- https://support.apple.com/kb/HT205030 x_refsource_CONFIRMVendor Advisory
- https://support.apple.com/kb/HT205031 x_refsource_CONFIRMVendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2014-3660
- https://www.ncsc.nl/actueel/nieuwsberichten/kwetsbaarheid-ontdekt-in-libxml2.html x_refsource_MISC
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner redhat
Published Nov 4, 2014
Updated Aug 6, 2024
Reserved May 14, 2014
Link CVE-2014-3660
CISA Vulnrichment
Updated n/a