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Enterprise Linux DesktopOperating system · Redhat

CVE-2015-4600

CRITICAL · 9.8 CVSS v3.0 Published 2016-05-16
Fix available
A fix is available. Upgrade to after 5.4.39 or later.
See remediation →
100/100
Remediation priority · Urgent
Public exploit Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
The SoapClient implementation in PHP before 5.4.40, 5.5.x before 5.5.24, and 5.6.x before 5.6.8 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via an unexpected data type, related to "type confusion" issues in the (1) SoapClient::__getLastRequest, (2) SoapClient::__getLastResponse, (3) SoapClient::__getLastRequestHeaders, (4) SoapClient::__getLastResponseHeaders, (5) SoapClient::__getCookies, and (6) SoapClient::__setCookie methods.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Enterprise Linux DesktopOperating system
Affected:= 7.0
Enterprise Linux Hpc NodeOperating system
Affected:= 7.0
Enterprise Linux Hpc Node EusOperating system
Affected:= 7.1
Enterprise Linux ServerOperating system
Affected:= 7.0
Enterprise Linux Server EusOperating system
Affected:= 7.1
Enterprise Linux WorkstationOperating system
Affected:= 7.0
PHPApplication
Affected:<= 5.4.39= 5.5.0= 5.5.1= 5.5.2= 5.5.3= 5.5.4= 5.5.5= 5.5.6= 5.5.7= 5.5.8= 5.5.9= 5.5.10

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to a release after 5.4.39
Recommended fix High confidence

PHP 5.4.40+ (or migrate to PHP 7.x for long-term support), PHP 5.5.24+, or PHP 5.6.8+

  1. Identify the currently installed PHP version using 'php -v'
  2. For RHEL 7.x systems: Run 'yum update php' or 'yum update php*' to apply available security updates
  3. After update, verify the new PHP version is 5.4.40 or higher for 5.4.x, 5.5.24 or higher for 5.5.x, or 5.6.8 or higher for 5.6.x using 'php -v'
  4. Restart any web servers (httpd, nginx) and PHP-FPM services to load the updated PHP: 'systemctl restart httpd' or 'systemctl restart php-fpm'
  5. Verify the SoapClient class is properly loaded and the vulnerability is patched by testing SoapClient functionality
Caveat PHP 5.4 and 5.5 are end-of-life; upgrading may introduce compatibility breaks with legacy PHP code; consider migrating to PHP 7.x for sustained support

Generated from the published advisory — verify against the referenced sources before acting.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2015-4600 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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