mod_security: bypass of intended rules via chunked requests
Published Apr 15, 2014
5.0
MEDIUMCVSS 2.0
EPSS 2.67%
Description
apache2/modsecurity.c in ModSecurity before 2.7.6 allows remote attackers to bypass rules by using chunked transfer coding with a capitalized Chunked value in the Transfer-Encoding HTTP header.
Affected products
No data.
Configuration 1
- < 2.7.6
Configuration 2
- 7.0
- 8.0
No data.
Red Hat Enterprise Linux 7
mod_security
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | mod_security | Not affected | n/a |
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:L/Au:N/C:N/I:P/A:N
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 (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.67% (0.02670) | 85.23th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.65% (0.02648) | 83.59th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.84% (0.00842) | 73.12th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.82% (0.00818) | 82.55th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.82% (0.00818) | 81.27th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.82% (0.00818) | 79.22th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.14% (0.01136) | 59.45th | v2 (v2022.01.01) |
| Oct 18, 2022 | 1.14% (0.01136) | 58.28th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.14% (0.01136) | 56.27th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.14% (0.01136) | 34.23th | v2 (v2022.01.01) |
No CWE recorded.
References (7)
- http://martin.swende.se/blog/HTTPChunked.html x_refsource_MISCExploitThird Party Advisory
- http://www.debian.org/security/2014/dsa-2991 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2013-5705 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1082904 Issue Tracking
- https://github.com/SpiderLabs/ModSecurity/commit/f8d441cd25172fdfe5b613442fedfc0da3cc333d x_refsource_CONFIRMPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2013-5705
- https://www.cve.org/CVERecord?id=CVE-2013-5705
| Link | Providers | Tags |
|---|---|---|
| http://martin.swende.se/blog/HTTPChunked.html | x_refsource_MISCExploitThird Party Advisory | |
| http://www.debian.org/security/2014/dsa-2991 | vendor-advisoryx_refsource_DEBIANThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2013-5705 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1082904 | Issue Tracking | |
| https://github.com/SpiderLabs/ModSecurity/commit/f8d441cd25172fdfe5b613442fedfc0da3cc333d | x_refsource_CONFIRMPatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2013-5705 | ||
| https://www.cve.org/CVERecord?id=CVE-2013-5705 |
Change history (0)
No recorded changes yet.