php: iconv_mime_decode_headers skips headers using unsupported encoding
Published Jan 18, 2011
5.0
MEDIUMCVSS 2.0
EPSS 1.63%
Description
The iconv_mime_decode_headers function in the Iconv extension in PHP before 5.3.4 does not properly handle encodings that are unrecognized by the iconv and mbstring (aka Multibyte String) implementations, which allows remote attackers to trigger an incomplete output array, and possibly bypass spam detection or have unspecified other impact, via a crafted Subject header in an e-mail message, as demonstrated by the ks_c_5601-1987 character set.
Affected products
No data.
- ≤ 5.3.3
- 1.0
- 2.0
- 2.0b10
- 3.0
- 3.0.1
- 3.0.2
- 3.0.3
- 3.0.4
- 3.0.5
- 3.0.6
- 3.0.7
- 3.0.8
- 3.0.9
- 3.0.10
- 3.0.11
- 3.0.12
- 3.0.13
- 3.0.14
- 3.0.15
- 3.0.16
- 3.0.17
- 3.0.18
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0.0
- 4.0.1
- 4.0.2
- 4.0.3
- 4.0.4
- 4.0.5
- 4.0.6
- 4.0.7
- 4.1.0
- 4.1.1
- 4.1.2
- 4.2.0
- 4.2.1
- 4.2.2
- 4.2.3
- 4.3.0
- 4.3.1
- 4.3.2
- 4.3.3
- 4.3.4
- 4.3.5
- 4.3.6
- 4.3.7
- 4.3.8
- 4.3.9
- 4.3.10
- 4.3.11
- 4.4.0
- 4.4.1
- 4.4.2
- 4.4.3
- 4.4.4
- 4.4.5
- 4.4.6
- 4.4.7
- 4.4.8
- 4.4.9
- 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
- 5.1.0
- 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
- 5.2.4
- 5.2.5
- 5.2.6
- 5.2.7
- 5.2.8
- 5.2.9
- 5.2.10
- 5.2.11
- 5.2.12
- 5.2.13
- 5.2.14
- 5.2.15
- 5.2.16
- 5.2.17
- 5.3.0
- 5.3.1
- 5.3.2
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat does not consider this issue to be a security vulnerability, rather consider this to be a non-security bug.
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 | 1.63% (0.01628) | 75.30th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.63% (0.01628) | 72.99th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.15% (0.00155) | 33.78th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.60% (0.00600) | 79.18th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.60% (0.00600) | 77.79th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.60% (0.00600) | 75.14th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 17, 2023 | 1.21% (0.01213) | 66.22th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
References (9)
- http://bugs.php.net/52941 x_refsource_CONFIRM
- http://coding.derkeiler.com/Archive/PHP/php.general/2007-04/msg00605.html mailing-listx_refsource_MLIST
- http://www.php.net/ChangeLog-5.php x_refsource_CONFIRM
- https://access.redhat.com/security/cve/CVE-2010-4699 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=670806 Issue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/64963 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2010-4699
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12393 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2010-4699
| Link | Providers | Tags |
|---|---|---|
| http://bugs.php.net/52941 | x_refsource_CONFIRM | |
| http://coding.derkeiler.com/Archive/PHP/php.general/2007-04/msg00605.html | mailing-listx_refsource_MLIST | |
| http://www.php.net/ChangeLog-5.php | x_refsource_CONFIRM | |
| https://access.redhat.com/security/cve/CVE-2010-4699 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=670806 | Issue Tracking | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/64963 | vdb-entryx_refsource_XF | |
| https://nvd.nist.gov/vuln/detail/CVE-2010-4699 | ||
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12393 | vdb-entrysignaturex_refsource_OVAL | |
| https://www.cve.org/CVERecord?id=CVE-2010-4699 |
Change history (0)
No recorded changes yet.