PHP before 5.3.9 computes hash values for form parameters without restricting the ability…
Priority MEDIUM 64CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
Summary
PHP before 5.3.9 computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.
Why it matters now
EPSS 0.8337 99th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by the CNA
Fix Fixed Red Hat: 3 advisories
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 45
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:php:php:*:*:*:*:*:*:*:* | up to 5.3.8 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.0.0:*:*:*:*:*:*:* | 5.0.0 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.0.0:beta1:*:*:*:*:*:* | 5.0.0 beta1 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.0.0:beta2:*:*:*:*:*:* | 5.0.0 beta2 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.0.0:beta3:*:*:*:*:*:* | 5.0.0 beta3 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.0.0:beta4:*:*:*:*:*:* | 5.0.0 beta4 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.0.0:rc1:*:*:*:*:*:* | 5.0.0 rc1 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.0.0:rc2:*:*:*:*:*:* | 5.0.0 rc2 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.0.0:rc3:*:*:*:*:*:* | 5.0.0 rc3 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.0.1:*:*:*:*:*:*:* | 5.0.1 | Vulnerable | PHP |
- cpe:2.3:a:php:php:*:*:*:*:*:*:*:* Versions up to 5.3.8 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.0.0:*:*:*:*:*:*:* Versions 5.0.0 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.0.0:beta1:*:*:*:*:*:* Versions 5.0.0 beta1 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.0.0:beta2:*:*:*:*:*:* Versions 5.0.0 beta2 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.0.0:beta3:*:*:*:*:*:* Versions 5.0.0 beta3 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.0.0:beta4:*:*:*:*:*:* Versions 5.0.0 beta4 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.0.0:rc1:*:*:*:*:*:* Versions 5.0.0 rc1 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.0.0:rc2:*:*:*:*:*:* Versions 5.0.0 rc2 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.0.0:rc3:*:*:*:*:*:* Versions 5.0.0 rc3 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.0.1:*:*:*:*:*:*:* Versions 5.0.1 Vulnerable ·PHP
Show 35 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:php:php:5.0.2:*:*:*:*:*:*:* | 5.0.2 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.0.3:*:*:*:*:*:*:* | 5.0.3 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.0.4:*:*:*:*:*:*:* | 5.0.4 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.0.5:*:*:*:*:*:*:* | 5.0.5 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.1.1:*:*:*:*:*:*:* | 5.1.1 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.1.2:*:*:*:*:*:*:* | 5.1.2 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.1.3:*:*:*:*:*:*:* | 5.1.3 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.1.4:*:*:*:*:*:*:* | 5.1.4 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.1.5:*:*:*:*:*:*:* | 5.1.5 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.1.6:*:*:*:*:*:*:* | 5.1.6 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.2.0:*:*:*:*:*:*:* | 5.2.0 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.2.1:*:*:*:*:*:*:* | 5.2.1 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.2.2:*:*:*:*:*:*:* | 5.2.2 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.2.3:*:*:*:*:*:*:* | 5.2.3 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.2.4:*:*:*:*:*:*:* | 5.2.4 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.2.5:*:*:*:*:*:*:* | 5.2.5 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.2.6:*:*:*:*:*:*:* | 5.2.6 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.2.7:*:*:*:*:*:*:* | 5.2.7 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.2.8:*:*:*:*:*:*:* | 5.2.8 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.2.9:*:*:*:*:*:*:* | 5.2.9 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.2.10:*:*:*:*:*:*:* | 5.2.10 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.2.11:*:*:*:*:*:*:* | 5.2.11 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.2.12:*:*:*:*:*:*:* | 5.2.12 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.2.14:*:*:*:*:*:*:* | 5.2.14 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.2.15:*:*:*:*:*:*:* | 5.2.15 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.2.16:*:*:*:*:*:*:* | 5.2.16 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.2.17:*:*:*:*:*:*:* | 5.2.17 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.3.0:*:*:*:*:*:*:* | 5.3.0 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.3.1:*:*:*:*:*:*:* | 5.3.1 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.3.2:*:*:*:*:*:*:* | 5.3.2 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.3.3:*:*:*:*:*:*:* | 5.3.3 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.3.4:*:*:*:*:*:*:* | 5.3.4 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.3.5:*:*:*:*:*:*:* | 5.3.5 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.3.6:*:*:*:*:*:*:* | 5.3.6 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.3.7:*:*:*:*:*:*:* | 5.3.7 | Vulnerable | PHP |
- cpe:2.3:a:php:php:5.0.2:*:*:*:*:*:*:* Versions 5.0.2 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.0.3:*:*:*:*:*:*:* Versions 5.0.3 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.0.4:*:*:*:*:*:*:* Versions 5.0.4 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.0.5:*:*:*:*:*:*:* Versions 5.0.5 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.1.1:*:*:*:*:*:*:* Versions 5.1.1 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.1.2:*:*:*:*:*:*:* Versions 5.1.2 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.1.3:*:*:*:*:*:*:* Versions 5.1.3 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.1.4:*:*:*:*:*:*:* Versions 5.1.4 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.1.5:*:*:*:*:*:*:* Versions 5.1.5 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.1.6:*:*:*:*:*:*:* Versions 5.1.6 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.2.0:*:*:*:*:*:*:* Versions 5.2.0 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.2.1:*:*:*:*:*:*:* Versions 5.2.1 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.2.2:*:*:*:*:*:*:* Versions 5.2.2 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.2.3:*:*:*:*:*:*:* Versions 5.2.3 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.2.4:*:*:*:*:*:*:* Versions 5.2.4 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.2.5:*:*:*:*:*:*:* Versions 5.2.5 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.2.6:*:*:*:*:*:*:* Versions 5.2.6 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.2.7:*:*:*:*:*:*:* Versions 5.2.7 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.2.8:*:*:*:*:*:*:* Versions 5.2.8 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.2.9:*:*:*:*:*:*:* Versions 5.2.9 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.2.10:*:*:*:*:*:*:* Versions 5.2.10 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.2.11:*:*:*:*:*:*:* Versions 5.2.11 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.2.12:*:*:*:*:*:*:* Versions 5.2.12 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.2.14:*:*:*:*:*:*:* Versions 5.2.14 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.2.15:*:*:*:*:*:*:* Versions 5.2.15 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.2.16:*:*:*:*:*:*:* Versions 5.2.16 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.2.17:*:*:*:*:*:*:* Versions 5.2.17 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.3.0:*:*:*:*:*:*:* Versions 5.3.0 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.3.1:*:*:*:*:*:*:* Versions 5.3.1 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.3.2:*:*:*:*:*:*:* Versions 5.3.2 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.3.3:*:*:*:*:*:*:* Versions 5.3.3 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.3.4:*:*:*:*:*:*:* Versions 5.3.4 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.3.5:*:*:*:*:*:*:* Versions 5.3.5 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.3.6:*:*:*:*:*:*:* Versions 5.3.6 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.3.7:*:*:*:*:*:*:* Versions 5.3.7 Vulnerable ·PHP
Remediation
Red Hat 3 advisories
- RHSA-2012:0071 Released 2012-01-30 · Red Hat rating Moderatephp security update
- Red Hat Enterprise Linux AS version 4 php-4.3.9-3.35, php-4.3.9-3.35.i386, php-4.3.9-3.35.ia64 +47
- Red Hat Enterprise Linux Desktop version 4 php-4.3.9-3.35, php-4.3.9-3.35.i386, php-devel-4.3.9-3.35 +25
- Red Hat Enterprise Linux ES version 4 php-4.3.9-3.35, php-4.3.9-3.35.i386, php-4.3.9-3.35.ia64 +39
- Red Hat Enterprise Linux WS version 4 php-4.3.9-3.35, php-4.3.9-3.35.i386, php-4.3.9-3.35.ia64 +39
- RHSA-2012:0033 Released 2012-01-18 · Red Hat rating Moderatephp security update
- RHEL Desktop Workstation (v. 5 client) php-5.1.6-27.el5_7.4, php-5.1.6-27.el5_7.4.i386, php-bcmath-5.1.6-27.el5_7.4 +35
- Red Hat Enterprise Linux (v. 5 server) php-5.1.6-27.el5_7.4, php-5.1.6-27.el5_7.4.i386, php-5.1.6-27.el5_7.4.ia64 +47
- RHSA-2012:0019 Released 2012-01-11 · Red Hat rating Moderatephp53 and php security update
- RHEL Desktop Workstation (v. 5 client) php53-5.3.3-1.el5_7.5, php53-5.3.3-1.el5_7.5.i386, php53-bcmath-5.3.3-1.el5_7.5 +39
- Red Hat Enterprise Linux (v. 5 server) php53-5.3.3-1.el5_7.5, php53-5.3.3-1.el5_7.5.i386, php53-5.3.3-1.el5_7.5.ia64 +47
- Red Hat Enterprise Linux Desktop Optional (v. 6) php-5.3.3-3.el6_2.5, php-bcmath-5.3.3-3.el6_2.5, php-cli-5.3.3-3.el6_2.5 +23
- Red Hat Enterprise Linux HPC Node (v. 6) php-5.3.3-3.el6_2.5, php-cli-5.3.3-3.el6_2.5, php-common-5.3.3-3.el6_2.5
- Red Hat Enterprise Linux HPC Node Optional (v. 6) php-5.3.3-3.el6_2.5, php-bcmath-5.3.3-3.el6_2.5, php-dba-5.3.3-3.el6_2.5 +21
- Red Hat Enterprise Linux Server (v. 6) php-5.3.3-3.el6_2.5, php-cli-5.3.3-3.el6_2.5, php-common-5.3.3-3.el6_2.5 +9
- Red Hat Enterprise Linux Server Optional (v. 6) php-5.3.3-3.el6_2.5, php-bcmath-5.3.3-3.el6_2.5, php-dba-5.3.3-3.el6_2.5 +12
- Red Hat Enterprise Linux Workstation (v. 6) php-5.3.3-3.el6_2.5, php-cli-5.3.3-3.el6_2.5, php-common-5.3.3-3.el6_2.5 +9
- Red Hat Enterprise Linux Workstation Optional (v. 6) php-5.3.3-3.el6_2.5, php-bcmath-5.3.3-3.el6_2.5, php-dba-5.3.3-3.el6_2.5 +12
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| RHEL Desktop Workstation (v. 5 client) | Fixed | RHSA-2012:0019, RHSA-2012:0033 |
| Red Hat Enterprise Linux (v. 5 server) | Fixed | RHSA-2012:0019, RHSA-2012:0033 |
| Red Hat Enterprise Linux AS version 4 | Fixed | RHSA-2012:0071 |
| Red Hat Enterprise Linux Desktop Optional (v. 6) | Fixed | RHSA-2012:0019 |
| Red Hat Enterprise Linux Desktop version 4 | Fixed | RHSA-2012:0071 |
| Red Hat Enterprise Linux ES version 4 | Fixed | RHSA-2012:0071 |
| Red Hat Enterprise Linux HPC Node (v. 6) | Fixed | RHSA-2012:0019 |
| Red Hat Enterprise Linux HPC Node Optional (v. 6) | Fixed | RHSA-2012:0019 |
| Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2012:0019 |
| Red Hat Enterprise Linux Server Optional (v. 6) | Fixed | RHSA-2012:0019 |
| Red Hat Enterprise Linux WS version 4 | Fixed | RHSA-2012:0071 |
| Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2012:0019 |
| Red Hat Enterprise Linux Workstation Optional (v. 6) | Fixed | RHSA-2012:0019 |
Timeline
- 2026-10-02 Threatist record created from CVE-2011-4885
- 2026-10-03 Alias added: GHSA-q9pr-6h9m-h8vf
References
Advisory 12
Other 8
- https://github.com/FireFart/HashCollision-DOS-POC/blob/master/HashtablePOC.py
- http://www.nruns.com/_downloads/advisory28122011.pdf
- http://www.oracle.com/technetwork/topics/security/cpujul2012-392727.html
- http://svn.php.net/viewvc?view=revision&revision=321003
- http://svn.php.net/viewvc?view=revision&revision=321040
- 20111228 n.runs-SA-2011.004 - web programming languages and platforms - DoS through hash table
- http://support.apple.com/kb/HT5281
- http://www.ocert.org/advisories/ocert-2011-003.html
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Sources
- CVE-2011-4885 · CVE Program
- CVE-2011-4885 · NVD
- FIRST EPSS
- GHSA-q9pr-6h9m-h8vf · GitHub Advisory Database · CC BY 4.0
- CVE-2011-4885 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences