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Critical severity · published May 22, 2016
CVE-2016-4537
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 accepts a negative integer for the scale argument, which allows remote…
9.8
CVSS
5.7%
EPSS
No
On KEV
Description
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 accepts a negative integer for the scale argument, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via a crafted call.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)5.7% · higher than 93% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PH
PHP · PHP
through 5.5.34; 5.6.0; 5.6.1; 5.6.2; 5.6.3; 5.6.4; +22 more · source: NVD
FE
Fedora · Fedoraproject
24 · source: NVD
LE
Leap · Opensuse
42.1 · source: NVD
Affected product
PH
PHP
PHP
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-4537
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-4537
lists.fedoraproject.org
http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183736.html
lists.opensuse.org
http://lists.opensuse.org/opensuse-updates/2016-05/msg00086.html
lists.opensuse.org
http://lists.opensuse.org/opensuse-updates/2016-06/msg00027.html
Patch
http://php.net/ChangeLog-5.php
Patch
http://php.net/ChangeLog-7.php
rhn.redhat.com
http://rhn.redhat.com/errata/RHSA-2016-2750.html
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