MEDIUM
php: hash table collisions CPU usage DoS (oCERT-2011-003)
Published Dec 30, 2011
5.0
MEDIUMCVSS 2.0
EPSS 83.37%
Description
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.
Affected products
No data.
OR
- ≤ 5.3.8
- 5.0.0
- 5.0.0
- 5.0.0
- 5.0.0
- 5.0.0
- 5.0.0
- 5.0.0
- 5.0.0
- 5.0.1
- 5.0.2
- 5.0.3
- 5.0.4
- 5.0.5
- 5.1.1
- 5.1.2
- 5.1.3
- 5.1.4
- 5.1.5
- 5.1.6
- 5.2.0
- 5.2.1
- 5.2.2
- 5.2.3
- 5.2.4
- 5.2.5
- 5.2.6
- 5.2.7
- 5.2.8
- 5.2.9
- 5.2.10
- 5.2.11
- 5.2.12
- 5.2.14
- 5.2.15
- 5.2.16
- 5.2.17
- 5.3.0
- 5.3.1
- 5.3.2
- 5.3.3
- 5.3.4
- 5.3.5
- 5.3.6
- 5.3.7
No data.
Red Hat Enterprise Linux 4
php-0:4.3.9-3.35
Fixed · RHSA-2012:0071
Red Hat Enterprise Linux 5
php-0:5.1.6-27.el5_7.4
Fixed · RHSA-2012:0033
Red Hat Enterprise Linux 5
php53-0:5.3.3-1.el5_7.5
Fixed · RHSA-2012:0019
Red Hat Enterprise Linux 6
php-0:5.3.3-3.el6_2.5
Fixed · RHSA-2012:0019
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | php-0:4.3.9-3.35 | Fixed | RHSA-2012:0071 |
| Red Hat Enterprise Linux 5 | php-0:5.1.6-27.el5_7.4 | Fixed | RHSA-2012:0033 |
| Red Hat Enterprise Linux 5 | php53-0:5.3.3-1.el5_7.5 | Fixed | RHSA-2012:0019 |
| Red Hat Enterprise Linux 6 | php-0:5.3.3-3.el6_2.5 | Fixed | RHSA-2012:0019 |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
83.37% 0.83370
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.83370
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (42 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 83.37% (0.83370) | 99.67th | v5 (v2026.06.15) |
| Jun 15, 2026 | 83.91% (0.83911) | 99.66th | v5 (v2026.06.15) |
| Mar 4, 2026 | 86.57% (0.86573) | 99.40th | v4 (v2025.03.14) |
| Mar 1, 2026 | 85.10% (0.85101) | 99.34th | v4 (v2025.03.14) |
| Feb 16, 2026 | 86.57% (0.86573) | 99.40th | v4 (v2025.03.14) |
| Feb 4, 2026 | 88.58% (0.88576) | 99.49th | v4 (v2025.03.14) |
| Feb 1, 2026 | 87.47% (0.87473) | 99.45th | v4 (v2025.03.14) |
| Jan 4, 2026 | 88.58% (0.88576) | 99.48th | v4 (v2025.03.14) |
| Jan 1, 2026 | 87.47% (0.87473) | 99.44th | v4 (v2025.03.14) |
| Dec 4, 2025 | 88.58% (0.88576) | 99.47th | v4 (v2025.03.14) |
| Dec 1, 2025 | 87.47% (0.87473) | 99.44th | v4 (v2025.03.14) |
| Nov 4, 2025 | 88.58% (0.88576) | 99.47th | v4 (v2025.03.14) |
| Nov 1, 2025 | 87.47% (0.87473) | 99.43th | v4 (v2025.03.14) |
| Oct 4, 2025 | 88.58% (0.88576) | 99.47th | v4 (v2025.03.14) |
| Oct 1, 2025 | 87.47% (0.87473) | 99.43th | v4 (v2025.03.14) |
| Aug 4, 2025 | 88.78% (0.88777) | 99.49th | v4 (v2025.03.14) |
| Aug 1, 2025 | 87.15% (0.87153) | 99.42th | v4 (v2025.03.14) |
| Jul 7, 2025 | 88.35% (0.88347) | 99.45th | v4 (v2025.03.14) |
| Jul 5, 2025 | 89.47% (0.89470) | 99.52th | v4 (v2025.03.14) |
| Jul 1, 2025 | 88.36% (0.88357) | 99.47th | v4 (v2025.03.14) |
| Jun 4, 2025 | 89.47% (0.89470) | 99.52th | v4 (v2025.03.14) |
| Jun 1, 2025 | 88.36% (0.88357) | 99.47th | v4 (v2025.03.14) |
| May 4, 2025 | 89.47% (0.89470) | 99.51th | v4 (v2025.03.14) |
| May 1, 2025 | 88.36% (0.88357) | 99.46th | v4 (v2025.03.14) |
| Apr 13, 2025 | 89.47% (0.89470) | 99.54th | v4 (v2025.03.14) |
| Apr 12, 2025 | 88.36% (0.88357) | 99.48th | v4 (v2025.03.14) |
| Apr 1, 2025 | 89.47% (0.89470) | 99.53th | v4 (v2025.03.14) |
| Mar 31, 2025 | 88.36% (0.88357) | 99.47th | v4 (v2025.03.14) |
| Mar 26, 2025 | 89.47% (0.89470) | 99.54th | v4 (v2025.03.14) |
| Mar 25, 2025 | 88.36% (0.88357) | 99.48th | v4 (v2025.03.14) |
| Mar 24, 2025 | 89.47% (0.89470) | 99.55th | v4 (v2025.03.14) |
| Mar 23, 2025 | 88.36% (0.88357) | 99.47th | v4 (v2025.03.14) |
| Mar 17, 2025 | 89.47% (0.89470) | 99.53th | v4 (v2025.03.14) |
| Mar 1, 2025 | 81.27% (0.81270) | 98.65th | v3 (v2023.03.01) |
| Nov 27, 2024 | 84.73% (0.84726) | 98.61th | v3 (v2023.03.01) |
| Jul 29, 2023 | 87.47% (0.87474) | 98.18th | v3 (v2023.03.01) |
| Mar 24, 2023 | 88.30% (0.88298) | 98.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 93.04% (0.93042) | 98.45th | v3 (v2023.03.01) |
| Mar 6, 2023 | 12.57% (0.12567) | 95.52th | v2 (v2022.01.01) |
| Apr 1, 2022 | 12.57% (0.12567) | 95.18th | v2 (v2022.01.01) |
| Mar 14, 2022 | 12.57% (0.12567) | 90.18th | v2 (v2022.01.01) |
| Feb 4, 2022 | 12.96% (0.12955) | 90.21th | v2 (v2022.01.01) |
Weaknesses (1)
References (31)
- http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html mailing-listx_refsource_BUGTRAQ
- http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041 vendor-advisoryx_refsource_HP
- http://lists.apple.com/archives/security-announce/2012/May/msg00001.html vendor-advisoryx_refsource_APPLE
- http://lists.opensuse.org/opensuse-security-announce/2012-03/msg00013.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2012-03/msg00016.html vendor-advisoryx_refsource_SUSE
- http://marc.info/?l=bugtraq&m=132871655717248&w=2 vendor-advisoryx_refsource_HP
- http://marc.info/?l=bugtraq&m=133469208622507&w=2 vendor-advisoryx_refsource_HP
- http://rhn.redhat.com/errata/RHSA-2012-0071.html vendor-advisoryx_refsource_REDHAT
- http://secunia.com/advisories/47404 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/48668 third-party-advisoryx_refsource_SECUNIA
- http://support.apple.com/kb/HT5281 x_refsource_CONFIRM
- http://svn.php.net/viewvc?view=revision&revision=321003 x_refsource_CONFIRM
- http://svn.php.net/viewvc?view=revision&revision=321040 x_refsource_CONFIRM
- http://www.debian.org/security/2012/dsa-2399 vendor-advisoryx_refsource_DEBIAN
- http://www.exploit-db.com/exploits/18296 exploitx_refsource_EXPLOIT-DB
- http://www.exploit-db.com/exploits/18305 exploitx_refsource_EXPLOIT-DB
- http://www.kb.cert.org/vuls/id/903934 third-party-advisoryx_refsource_CERT-VNUS Government Resource
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:197 vendor-advisoryx_refsource_MANDRIVA
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:150 vendor-advisoryx_refsource_MANDRIVA
- http://www.nruns.com/_downloads/advisory28122011.pdf x_refsource_MISC
- http://www.ocert.org/advisories/ocert-2011-003.html x_refsource_MISC
- http://www.oracle.com/technetwork/topics/security/cpujul2012-392727.html x_refsource_CONFIRM
- http://www.redhat.com/support/errata/RHSA-2012-0019.html vendor-advisoryx_refsource_REDHAT
- http://www.securityfocus.com/bid/51193 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id?1026473 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/security/cve/CVE-2011-4885 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=750547 Issue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/72021 vdb-entryx_refsource_XF
- https://github.com/FireFart/HashCollision-DOS-POC/blob/master/HashtablePOC.py x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2011-4885
- https://www.cve.org/CVERecord?id=CVE-2011-4885
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Dec 30, 2011
Updated Aug 7, 2024
Reserved Dec 21, 2011
Link CVE-2011-4885
CISA Vulnrichment
Updated n/a