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Fencer Vulns
high 7.8

CVE-2007-1718 json

CRLF injection vulnerability in the mail function in PHP 4.0.0 through 4.4.6 and 5.0.0 through 5.2.1 allows remote attackers to inject arbi…

published 2007-03-28 19 y ago modified 2026-06-16 4 mo ago also EUVD-2007-1712

cvss
7.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
6.9%
EPSS 6.9% chance of exploitation in 30 days, percentile 94%
public exploits
1
Exploit-DB

Summary

CRLF injection vulnerability in the mail function in PHP 4.0.0 through 4.4.6 and 5.0.0 through 5.2.1 allows remote attackers to inject arbitrary e-mail headers and possibly conduct spam attacks via a control character immediately following folding of the (1) Subject or (2) To parameter, as demonstrated by a parameter containing a "\r\n\t\n" sequence, related to an increment bug in the SKIP_LONG_HEADER_SEP macro.

Patch / fix

  • php RHEL 1 APPLICATION_STACK 5.1.6-3.el4s1.6
  • php-gd RHEL 1 APPLICATION_STACK 5.1.6-3.el4s1.6
  • php-cli RHEL 1 APPLICATION_STACK 5.1.6-3.el4s1.6
  • php-dba RHEL 1 APPLICATION_STACK 5.1.6-3.el4s1.6
  • php-pdo RHEL 1 APPLICATION_STACK 5.1.6-3.el4s1.6
  • php-xml RHEL 1 APPLICATION_STACK 5.1.6-3.el4s1.6
  • php-imap RHEL 1 APPLICATION_STACK 5.1.6-3.el4s1.6
  • php-ldap RHEL 1 APPLICATION_STACK 5.1.6-3.el4s1.6

red hat advisories RHSA-2007:0162RHSA-2007:0155RHSA-2007:0153

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2007-1718 updated

security flaw

  • Red Hat Application Stack v1 for Enterprise Linux AS (v.4) php 5.1.6-3.el4s1.6, php-gd 5.1.6-3.el4s1.6, php-cli 5.1.6-3.el4s1.6, php-dba 5.1.6-3.el4s1.6, php-pdo 5.1.6-3.el4s1.6, php-xml 5.1.6-3.el4s1.6, +12 more Red Hat Application Stack v1 for Enterprise Linux ES (v.4) php 5.1.6-3.el4s1.6, php-gd 5.1.6-3.el4s1.6, php-cli 5.1.6-3.el4s1.6, php-dba 5.1.6-3.el4s1.6, php-pdo 5.1.6-3.el4s1.6, php-xml 5.1.6-3.el4s1.6, +12 more
    fixed: vendor fix RHSA-2007:0162
  • Red Hat Desktop version 3 php 4.3.2-40.ent, php-imap 4.3.2-40.ent, php-ldap 4.3.2-40.ent, php-odbc 4.3.2-40.ent, php-mysql 4.3.2-40.ent, php-pgsql 4.3.2-40.ent
    fixed: vendor fix RHSA-2007:0155
  • Red Hat Enterprise Linux (v. 5 server) php 5.1.6-11.el5, php-gd 5.1.6-11.el5, php-cli 5.1.6-11.el5, php-dba 5.1.6-11.el5, php-pdo 5.1.6-11.el5, php-xml 5.1.6-11.el5, +12 more
    fixed: vendor fix RHSA-2007:0153
  • Red Hat Enterprise Linux AS version 3 php 4.3.2-40.ent, php-imap 4.3.2-40.ent, php-ldap 4.3.2-40.ent, php-odbc 4.3.2-40.ent, php-mysql 4.3.2-40.ent, php-pgsql 4.3.2-40.ent Red Hat Enterprise Linux AS version 4 php 4.3.9-3.22.4, php-gd 4.3.9-3.22.4, php-imap 4.3.9-3.22.4, php-ldap 4.3.9-3.22.4, php-odbc 4.3.9-3.22.4, php-pear 4.3.9-3.22.4, +7 more Red Hat Enterprise Linux Desktop version 4 php 4.3.9-3.22.4, php-gd 4.3.9-3.22.4, php-imap 4.3.9-3.22.4, php-ldap 4.3.9-3.22.4, php-odbc 4.3.9-3.22.4, php-pear 4.3.9-3.22.4, +7 more
    fixed: vendor fix RHSA-2007:0155
  • Red Hat Enterprise Linux Desktop Workstation (v. 5 client) php 5.1.6-11.el5, php-gd 5.1.6-11.el5, php-cli 5.1.6-11.el5, php-dba 5.1.6-11.el5, php-pdo 5.1.6-11.el5, php-xml 5.1.6-11.el5, +12 more
    fixed: vendor fix RHSA-2007:0153
  • Red Hat Enterprise Linux ES version 3 php 4.3.2-40.ent, php-imap 4.3.2-40.ent, php-ldap 4.3.2-40.ent, php-odbc 4.3.2-40.ent, php-mysql 4.3.2-40.ent, php-pgsql 4.3.2-40.ent Red Hat Enterprise Linux ES version 4 php 4.3.9-3.22.4, php-gd 4.3.9-3.22.4, php-imap 4.3.9-3.22.4, php-ldap 4.3.9-3.22.4, php-odbc 4.3.9-3.22.4, php-pear 4.3.9-3.22.4, +7 more Red Hat Enterprise Linux WS version 3 php 4.3.2-40.ent, php-imap 4.3.2-40.ent, php-ldap 4.3.2-40.ent, php-odbc 4.3.2-40.ent, php-mysql 4.3.2-40.ent, php-pgsql 4.3.2-40.ent Red Hat Enterprise Linux WS version 4 php 4.3.9-3.22.4, php-gd 4.3.9-3.22.4, php-imap 4.3.9-3.22.4, php-ldap 4.3.9-3.22.4, php-odbc 4.3.9-3.22.4, php-pear 4.3.9-3.22.4, +7 more
    fixed: vendor fix RHSA-2007:0155

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. Published
  2. First public exploit (EDB-29784)

Exploit prediction

6.95% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-29784 PHP 5.2.1 - Folded Mail Headers Email Header Injection remote, 2007-11-26
  • securityfocus.com http://www.securityfocus.com/bid/23145 referenced PoC, tagged "exploit" by a source, unverified
  • php-security.org http://www.php-security.org/MOPB/MOPB-34-2007.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:C/A:N

Classification

Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.