Interpretation conflict in ModSecurity (mod_security) 2.1.0 and earlier allows remote attackers to bypass request rules via application/x-www-form-urlencoded POST data that contains an ASCIIZ (0x00) byte, which mod_security treats as a terminator even though it is still processed as normal data by some HTTP parsers including PHP 5.2.0, and possibly parsers in Perl, and Python
Published Mar 8, 2007
6.8
MEDIUMCVSS 2.0
EPSS 6.62%
Description
Interpretation conflict in ModSecurity (mod_security) 2.1.0 and earlier allows remote attackers to bypass request rules via application/x-www-form-urlencoded POST data that contains an ASCIIZ (0x00) byte, which mod_security treats as a terminator even though it is still processed as normal data by some HTTP parsers including PHP 5.2.0, and possibly parsers in Perl, and Python.
Affected products
No data.
- 1.7
- 1.7.1
- 1.7.2
- 1.7.4
- 1.7.5
- 1.9.4
- 2.1
No data.
No Red Hat product state for this CVE.
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.
AV:N/AC:M/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
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 (20 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 6.62% (0.06616) | 93.65th | v5 (v2026.06.15) |
| Jun 15, 2026 | 6.62% (0.06616) | 92.97th | v5 (v2026.06.15) |
| Feb 8, 2026 | 23.50% (0.23497) | 95.83th | v4 (v2025.03.14) |
| May 23, 2025 | 22.37% (0.22371) | 95.49th | v4 (v2025.03.14) |
| Mar 30, 2025 | 25.84% (0.25843) | 95.80th | v4 (v2025.03.14) |
| Mar 29, 2025 | 33.13% (0.33131) | 95.16th | v4 (v2025.03.14) |
| Mar 17, 2025 | 25.84% (0.25843) | 95.80th | v4 (v2025.03.14) |
| Jan 26, 2025 | 13.55% (0.13550) | 95.62th | v3 (v2023.03.01) |
| Dec 17, 2024 | 12.27% (0.12266) | 95.37th | v3 (v2023.03.01) |
| Nov 11, 2024 | 15.75% (0.15745) | 96.06th | v3 (v2023.03.01) |
| Sep 17, 2024 | 16.76% (0.16763) | 96.13th | v3 (v2023.03.01) |
| Jun 11, 2024 | 15.55% (0.15547) | 95.93th | v3 (v2023.03.01) |
| Feb 17, 2024 | 15.30% (0.15301) | 95.66th | v3 (v2023.03.01) |
| Jan 10, 2024 | 11.79% (0.11788) | 94.80th | v3 (v2023.03.01) |
| Dec 3, 2023 | 13.63% (0.13625) | 95.05th | v3 (v2023.03.01) |
| Oct 26, 2023 | 27.35% (0.27352) | 96.24th | v3 (v2023.03.01) |
| Mar 7, 2023 | 27.78% (0.27780) | 96.07th | 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) |
| Feb 4, 2022 | 12.57% (0.12567) | 90.03th | v2 (v2022.01.01) |
No CWE recorded.
References (15)
- http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c00727143 vendor-advisoryx_refsource_HP
- http://secunia.com/advisories/24373 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/25316 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/31087 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/31113 third-party-advisoryx_refsource_SECUNIA
- http://www.gentoo.org/security/en/glsa/glsa-200705-17.xml vendor-advisoryx_refsource_GENTOO
- http://www.modsecurity.org/blog/archives/2007/03/modsecurity_asc.html x_refsource_CONFIRM
- http://www.oracle.com/technetwork/topics/security/cpujul2008-090335.html x_refsource_CONFIRM
- http://www.osvdb.org/32778 vdb-entryx_refsource_OSVDB
- http://www.php-security.org/MOPB/BONUS-12-2007.html x_refsource_MISCExploitVendor Advisory
- http://www.securityfocus.com/bid/22831 vdb-entryx_refsource_BIDVendor Advisory
- http://www.vupen.com/english/advisories/2007/0868 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2008/2109/references vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2008/2115 vdb-entryx_refsource_VUPEN
- https://exchange.xforce.ibmcloud.com/vulnerabilities/32872 vdb-entryx_refsource_XF
Change history (0)
No recorded changes yet.