UBUNTU-CVE-2016-4538
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UBUNTU-CVE-2016-4538
Published: 6 May 2016Last Modified: 22 Apr 2026
Upstream:
Aliases:
Summary:
Details: The bcpowmod function in ext/bcmath/bcmath.c in PHP before 5.5.35, 5.6.x before 5.6.21, and 7.x before 7.0.6 modifies certain data structures without considering whether they are copies of the _zero_, _one_, or _two_ global variable, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via a crafted call.
References: https://ubuntu.com/security/CVE-2016-4538, http://www.openwall.com/lists/oss-security/2016/05/05/21, https://ubuntu.com/security/notices/USN-2984-1, https://www.cve.org/CVERecord?id=CVE-2016-4538
Affected packages
Package
Name: php5
Purl: pkg:deb/ubuntu/[email protected]+dfsg-1ubuntu4.17?arch=source&distro=trusty
Affected ranges
Type: ECOSYSTEM
Events:
Introduced- 0
Fixed -5.5.9+dfsg-1ubuntu4.17
Affected versions
5.5.3+dfsg-1ubuntu2
5.5.3+dfsg-1ubuntu3
5.5.6+dfsg-1ubuntu1
5.5.6+dfsg-1ubuntu2
5.5.8+dfsg-2ubuntu1
5.5.9+dfsg-1ubuntu1
5.5.9+dfsg-1ubuntu2
5.5.9+dfsg-1ubuntu3
5.5.9+dfsg-1ubuntu4
5.5.9+dfsg-1ubuntu4.1
5.5.9+dfsg-1ubuntu4.2
5.5.9+dfsg-1ubuntu4.3
5.5.9+dfsg-1ubuntu4.4
5.5.9+dfsg-1ubuntu4.5
5.5.9+dfsg-1ubuntu4.6
5.5.9+dfsg-1ubuntu4.7
5.5.9+dfsg-1ubuntu4.9
5.5.9+dfsg-1ubuntu4.11
5.5.9+dfsg-1ubuntu4.12
5.5.9+dfsg-1ubuntu4.13
5.5.9+dfsg-1ubuntu4.14
5.5.9+dfsg-1ubuntu4.16
Common Vulnerability Scoring System
Attack Vector
Network
Adjacent
Local
Physical
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
