Unspecified vulnerability in session.c in PHP before 5.1.3 has unknown impact and attack vectors, related to "certain characters in session
Unspecified vulnerability in session.c in PHP before 5.1.3 has unknown impact and attack vectors, related to "certain characters in session names," including special characters that are frequently associated with CRLF injection, SQL injection, cross-site scripting (XSS), and HTTP response splitting vulnerabilities. NOTE: while the nature of the vulnerability is unspecified, it is likely that this is related to a violation of an expectation by PHP applications that the session name is alphanumeric, as implied in the PHP manual for session_name().
- Published
- Jun 14, 2006
- Updated
- Jun 16, 2026
- EPSS
- 2.5% · 84th percentile
- CWE
- —
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Report tools
Action score
38
Monitor
Low priority for now.
- CVSS
- 37 / 40 · 9.3 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 2.5%
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| php group | php | cpe:2.3:a:php_group:php |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- php group phpup to 5.1.2 inclusive
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Red Hat:enterprise_linux:3::as | php | before 0:4.3.2-36.ent | 0:4.3.2-36.ent |
| Red Hat:enterprise_linux:3::as | php-debuginfo | before 0:4.3.2-36.ent | 0:4.3.2-36.ent |
| Red Hat:enterprise_linux:3::as | php-devel | before 0:4.3.2-36.ent | 0:4.3.2-36.ent |
| Red Hat:enterprise_linux:3::as | php-imap | before 0:4.3.2-36.ent | 0:4.3.2-36.ent |
| Red Hat:enterprise_linux:3::as | php-ldap | before 0:4.3.2-36.ent | 0:4.3.2-36.ent |
| Red Hat:enterprise_linux:3::as | php-mysql | before 0:4.3.2-36.ent | 0:4.3.2-36.ent |
| Red Hat:enterprise_linux:3::as | php-odbc | before 0:4.3.2-36.ent | 0:4.3.2-36.ent |
| Red Hat:enterprise_linux:3::as | php-pgsql | before 0:4.3.2-36.ent | 0:4.3.2-36.ent |
| Red Hat:enterprise_linux:4::as | php | before 0:4.3.9-3.18 | 0:4.3.9-3.18 |
| Red Hat:enterprise_linux:4::as | php-debuginfo | before 0:4.3.9-3.18 | 0:4.3.9-3.18 |
| Red Hat:enterprise_linux:4::as | php-devel | before 0:4.3.9-3.18 | 0:4.3.9-3.18 |
| Red Hat:enterprise_linux:4::as | php-domxml | before 0:4.3.9-3.18 | 0:4.3.9-3.18 |
| Red Hat:enterprise_linux:4::as | php-gd | before 0:4.3.9-3.18 | 0:4.3.9-3.18 |
| Red Hat:enterprise_linux:4::as | php-imap | before 0:4.3.9-3.18 | 0:4.3.9-3.18 |
| Red Hat:enterprise_linux:4::as | php-ldap | before 0:4.3.9-3.18 | 0:4.3.9-3.18 |
| Red Hat:enterprise_linux:4::as | php-mbstring | before 0:4.3.9-3.18 | 0:4.3.9-3.18 |
| Red Hat:enterprise_linux:4::as | php-mysql | before 0:4.3.9-3.18 | 0:4.3.9-3.18 |
| Red Hat:enterprise_linux:4::as | php-ncurses | before 0:4.3.9-3.18 | 0:4.3.9-3.18 |
| Red Hat:enterprise_linux:4::as | php-odbc | before 0:4.3.9-3.18 | 0:4.3.9-3.18 |
| Red Hat:enterprise_linux:4::as | php-pear | before 0:4.3.9-3.18 | 0:4.3.9-3.18 |
| Red Hat:enterprise_linux:4::as | php-pgsql | before 0:4.3.9-3.18 | 0:4.3.9-3.18 |
| Red Hat:enterprise_linux:4::as | php-snmp | before 0:4.3.9-3.18 | 0:4.3.9-3.18 |
| Red Hat:enterprise_linux:4::as | php-xmlrpc | before 0:4.3.9-3.18 | 0:4.3.9-3.18 |
Same product
php group: all recordsOther highest-scoring records for the same primary product.
- CVE-2024-2756__Host-/__Secure- cookie bypass due to partial CVE-2022-31629 fix37Monitor
- CVE-2006-3018Unspecified vulnerability in the session extension functionality in PHP before 5.1.3 has unknown impact and attack vectors related to heap c31Monitor
- CVE-2026-91765SOAP: Unbounded Recursion in Server-Side cleanup_xml_node30Monitor
- CVE-2026-17545PHP on Windows: Reserved Device Names Are Not Rejected Before File/Stream I/O which can cause DoS27Monitor
- CVE-2026-91768IPv6 ACL bypass in FastCGI listen.allowed_clients due to partial address comparison (memcmp 12 bytes)26Monitor
- CVE-2026-91767Heap-buffer-overflow in php_openssl_matches_wildcard_name on crafted server cert wildcard CN26Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| red hat:php | 0:4.3.2-36.ent · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:php-debuginfo | 0:4.3.2-36.ent · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:php-devel | 0:4.3.2-36.ent · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:php-domxml | 0:4.3.9-3.18 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:php-gd | 0:4.3.9-3.18 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:php-imap | 0:4.3.2-36.ent · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:php-ldap | 0:4.3.2-36.ent · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:php-mbstring | 0:4.3.9-3.18 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:php-mysql | 0:4.3.2-36.ent · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:php-ncurses | 0:4.3.9-3.18 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:php-odbc | 0:4.3.2-36.ent · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:php-pgsql | 0:4.3.2-36.ent · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
If successful
- Confidentiality
- C · data can be read
- Integrity
- C · data or configuration can be modified
- Availability
- C · the service can be disrupted
- Attack complexity
- M
- Confidentiality impact
- C
- Integrity impact
- C
- Availability impact
- C
Weakness class (CWE)
—
CVSS vector
AV:N/AC:M/Au:N/C:C/I:C/A:C
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- secunia.com/advisories/22225
- ftp://patches.sgi.com/support/free/security/advisories/20061001-01-P.asc
- rhn.redhat.com/errata/RHSA-2006-0736.html
- secunia.com/advisories/19927
- secunia.com/advisories/21050
- secunia.com/advisories/22004
- secunia.com/advisories/22069
- secunia.com/advisories/22440
- secunia.com/advisories/22487
- secunia.com/advisories/23247
- securitytracker.com/id?1016306
- support.avaya.com/elmodocs2/security/ASA-2006-221.htm
- support.avaya.com/elmodocs2/security/ASA-2006-222.htm
- www.mandriva.com/security/advisories?name=MDKSA-2006:122
- www.osvdb.org/25253
- www.php.net/release_5_1_3.php
- www.redhat.com/support/errata/RHSA-2006-0669.html
- www.redhat.com/support/errata/RHSA-2006-0682.html
- www.securityfocus.com/archive/1/447866/100/0/threaded
- www.turbolinux.com/security/2006/TLSA-2006-38.txt
Vendor advisories and official records. Exploit/PoC links are deliberately left out.