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CVE-2016-4472

HIGH
8.1
CVSS Score
Published: June 30, 2016 at 05:00 PM UTC
Updated: October 8, 2026 at 09:17 PM UTC
4 products affected across 4 vendorsUbuntu LinuxPythonLibexpat

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Severity
HIGH8.1
Exploit prediction
EPSS 12%
SSVC
No known exploit

Description

The overflow protection in Expat is removed by compilers with certain optimization settings, which allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via crafted XML data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-1283 and CVE-2015-2716.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ubuntu Linux· Canonicalrubygems
95%
12.04
Libexpat· Libexpat Project
95%
v ≤ 2.1.1*
Policy Auditor· McAfee
95%
v < 6.5.1*
Affected range stops below 6.5.1, so it looks safe — our inference, not a vendor statement
Python· Python
95%
2.7.0 ≤ v < 2.7.153.3.0 ≤ v < 3.3.73.4.0 ≤ v < 3.4.73.5.0 ≤ v < 3.5.43.6.0 ≤ v < 3.6.2*
Affected range stops below 2.7.15, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.3.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.4.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.5.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.6.2, so it looks safe — our inference, not a vendor statement

References (7)

VDB Entryx_refsource_BIDThird Party Advisory
Source: [email protected]
http://www.securityfocus.com/bid/91528
Vendor Advisoryx_refsource_UBUNTUThird Party Advisory
Source: [email protected]
http://www.ubuntu.com/usn/USN-3013-1
x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=1344251
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://kc.mcafee.com/corporate/index?page=content&id=SB10365
Vendor Advisoryx_refsource_GENTOOThird Party Advisory
Source: [email protected]
https://security.gentoo.org/glsa/201701-21
x_refsource_CONFIRMPatchThird Party Advisory
Source: [email protected]
https://sourceforge.net/p/expat/code_git/ci/f0bec73b018caa07d3e75ec8dd967f3785d71bde
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://www.tenable.com/security/tns-2016-20

SSVC — Action Prioritization

SSVCNo known exploitAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.1HIGH[email protected]
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-119

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