PHP: sapi_header_op() %0D sequence handling security bypass
Published Aug 30, 2012
4.3
MEDIUMCVSS 2.0
EPSS 10.17%
Description
The sapi_header_op function in main/SAPI.c in PHP before 5.3.11 and 5.4.x before 5.4.0RC2 does not check for %0D sequences (aka carriage return characters), which allows remote attackers to bypass an HTTP response-splitting protection mechanism via a crafted URL, related to improper interaction between the PHP header function and certain browsers, as demonstrated by Internet Explorer and Google Chrome.
Affected products
No data.
- ≤ 5.3.10
- 5.3.0
- 5.3.1
- 5.3.2
- 5.3.3
- 5.3.4
- 5.3.5
- 5.3.6
- 5.3.7
- 5.3.8
- 5.3.9
No data.
Red Hat Enterprise Linux 5
php-0:5.1.6-43.el5_10
Fixed · RHSA-2013:1814
Red Hat Enterprise Linux 5
php53-0:5.3.3-21.el5
Fixed · RHSA-2013:1307
Red Hat Enterprise Linux 6
php-0:5.3.3-22.el6
Fixed · RHSA-2013:0514
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | php-0:5.1.6-43.el5_10 | Fixed | RHSA-2013:1814 |
| Red Hat Enterprise Linux 5 | php53-0:5.3.3-21.el5 | Fixed | RHSA-2013:1307 |
| Red Hat Enterprise Linux 6 | php-0:5.3.3-22.el6 | Fixed | RHSA-2013:0514 |
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: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 (28 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 10.17% (0.10173) | 95.53th | v5 (v2026.06.15) |
| Jun 15, 2026 | 10.17% (0.10173) | 95.05th | v5 (v2026.06.15) |
| May 1, 2026 | 7.90% (0.07905) | 92.05th | v4 (v2025.03.14) |
| Jan 20, 2026 | 8.91% (0.08906) | 92.32th | v4 (v2025.03.14) |
| Dec 28, 2025 | 6.75% (0.06753) | 90.97th | v4 (v2025.03.14) |
| Dec 27, 2025 | 9.11% (0.09113) | 92.42th | v4 (v2025.03.14) |
| Nov 12, 2025 | 6.75% (0.06753) | 90.88th | v4 (v2025.03.14) |
| Oct 28, 2025 | 7.87% (0.07866) | 91.60th | v4 (v2025.03.14) |
| Oct 27, 2025 | 9.11% (0.09113) | 92.31th | v4 (v2025.03.14) |
| Oct 1, 2025 | 7.87% (0.07866) | 91.70th | v4 (v2025.03.14) |
| Aug 16, 2025 | 9.11% (0.09113) | 92.32th | v4 (v2025.03.14) |
| Jul 30, 2025 | 11.88% (0.11885) | 93.45th | v4 (v2025.03.14) |
| Jun 3, 2025 | 10.31% (0.10313) | 92.81th | v4 (v2025.03.14) |
| Mar 30, 2025 | 13.40% (0.13399) | 93.57th | v4 (v2025.03.14) |
| Mar 29, 2025 | 17.11% (0.17115) | 91.72th | v4 (v2025.03.14) |
| Mar 17, 2025 | 13.40% (0.13399) | 93.64th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.40% (0.01403) | 86.98th | v3 (v2023.03.01) |
| Mar 30, 2024 | 1.27% (0.01271) | 85.39th | v3 (v2023.03.01) |
| Nov 24, 2023 | 1.43% (0.01432) | 85.09th | v3 (v2023.03.01) |
| Sep 24, 2023 | 2.02% (0.02018) | 87.54th | v3 (v2023.03.01) |
| Mar 18, 2023 | 2.61% (0.02606) | 88.64th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.92% (0.02920) | 89.23th | v3 (v2023.03.01) |
| Mar 6, 2023 | 11.00% (0.10995) | 94.86th | v2 (v2022.01.01) |
| Nov 14, 2022 | 11.00% (0.10995) | 94.74th | v2 (v2022.01.01) |
| Aug 13, 2022 | 11.34% (0.11341) | 94.76th | v2 (v2022.01.01) |
| May 11, 2022 | 11.92% (0.11920) | 94.83th | v2 (v2022.01.01) |
| Apr 1, 2022 | 12.72% (0.12715) | 95.19th | v2 (v2022.01.01) |
| Feb 4, 2022 | 12.72% (0.12715) | 90.04th | v2 (v2022.01.01) |
References (14)
- http://article.gmane.org/gmane.comp.php.devel/70584 mailing-listx_refsource_MLIST
- http://lists.opensuse.org/opensuse-security-announce/2013-08/msg00006.html vendor-advisoryx_refsource_SUSE
- http://openwall.com/lists/oss-security/2012/08/29/5 mailing-listx_refsource_MLIST
- http://openwall.com/lists/oss-security/2012/09/05/15 mailing-listx_refsource_MLIST
- http://rhn.redhat.com/errata/RHSA-2013-1307.html vendor-advisoryx_refsource_REDHAT
- http://secunia.com/advisories/55078 third-party-advisoryx_refsource_SECUNIA
- http://security-tracker.debian.org/tracker/CVE-2011-1398 x_refsource_CONFIRM
- http://www.securitytracker.com/id?1027463 vdb-entryx_refsource_SECTRACK
- http://www.ubuntu.com/usn/USN-1569-1 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2011-1398 Vendor Advisory
- https://bugs.php.net/bug.php?id=60227 x_refsource_MISC
- https://bugzilla.redhat.com/show_bug.cgi?id=853329 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2011-1398
- https://www.cve.org/CVERecord?id=CVE-2011-1398
Change history (0)
No recorded changes yet.