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NVD / CVE Program· CNA redhat

CVE-2003-1303: Buffer overflow in the imap_fetch_overview function in the IMAP functionality (php_imap.c) in PHP before 4.3.3 allows remote attackers to…

MediumCVSS 5.0 · v2.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 24/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 12.1% (FIRST EPSS); higher than 96.2% of all records.
  • No special conditions are required; it is repeatable.
  • Fixed version: php (Red Hat:enterprise_linux:3::as) 0:4.3.2-30.ent; php-debuginfo (Red Hat:enterprise_linux:3::as) 0:4.3.2-30.ent; php-devel (Red Hat:enterprise_linux:3::as) 0:4.3.2-30.ent.

Low priority for now. Upgrade to php (Red Hat:enterprise_linux:3::as) 0:4.3.2-30.ent; php-debuginfo (Red Hat:enterprise_linux:3::as) 0:4.3.2-30.ent; php-devel (Red Hat:enterprise_linux:3::as) 0:4.3.2-30.ent or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Buffer overflow in the imap_fetch_overview function in the IMAP functionality (php_imap.c) in PHP before 4.3.3 allows remote attackers to cause a denial of service (segmentation fault) and possibly execute arbitrary code via a long e-mail address in a (1) To or (2) From header.

Published
Dec 31, 2003
Updated
Jun 16, 2026
EPSS
12.1% · 96th percentile
CWE
—

Report tools

JSON

Action score

24

Monitor

Low priority for now.

CVSS
20 / 40 · 5.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
4 / 30 · 12.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Follow CVE-2003-1303

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
phpphp

Using php? Add it to your stack and be the first to know about CVEs like this one. (PHP)

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When you'll hear from us

  • when a new CVE affecting this product is published
  • when a record in your stack enters KEV or is weaponized

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits every 10 minutes on paid plans, on the hour on the free plan.

Your free account also gets you

  • CVE alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools, at most 30 a day (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

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Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every Monday

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • php php4.3.0
  • php php4.3.1
  • php php4.3.2

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Red Hat:enterprise_linux:3::asphpbefore 0:4.3.2-30.ent0:4.3.2-30.ent
Red Hat:enterprise_linux:3::asphp-debuginfobefore 0:4.3.2-30.ent0:4.3.2-30.ent
Red Hat:enterprise_linux:3::asphp-develbefore 0:4.3.2-30.ent0:4.3.2-30.ent
Red Hat:enterprise_linux:3::asphp-imapbefore 0:4.3.2-30.ent0:4.3.2-30.ent
Red Hat:enterprise_linux:3::asphp-ldapbefore 0:4.3.2-30.ent0:4.3.2-30.ent
Red Hat:enterprise_linux:3::asphp-mysqlbefore 0:4.3.2-30.ent0:4.3.2-30.ent
Red Hat:enterprise_linux:3::asphp-odbcbefore 0:4.3.2-30.ent0:4.3.2-30.ent
Red Hat:enterprise_linux:3::asphp-pgsqlbefore 0:4.3.2-30.ent0:4.3.2-30.ent
Red Hat:enterprise_linux:4::asphpbefore 0:4.3.9-3.120:4.3.9-3.12
Red Hat:enterprise_linux:4::asphp-debuginfobefore 0:4.3.9-3.120:4.3.9-3.12
Red Hat:enterprise_linux:4::asphp-develbefore 0:4.3.9-3.120:4.3.9-3.12
Red Hat:enterprise_linux:4::asphp-domxmlbefore 0:4.3.9-3.120:4.3.9-3.12
Red Hat:enterprise_linux:4::asphp-gdbefore 0:4.3.9-3.120:4.3.9-3.12
Red Hat:enterprise_linux:4::asphp-imapbefore 0:4.3.9-3.120:4.3.9-3.12
Red Hat:enterprise_linux:4::asphp-ldapbefore 0:4.3.9-3.120:4.3.9-3.12
Red Hat:enterprise_linux:4::asphp-mbstringbefore 0:4.3.9-3.120:4.3.9-3.12
Red Hat:enterprise_linux:4::asphp-mysqlbefore 0:4.3.9-3.120:4.3.9-3.12
Red Hat:enterprise_linux:4::asphp-ncursesbefore 0:4.3.9-3.120:4.3.9-3.12
Red Hat:enterprise_linux:4::asphp-odbcbefore 0:4.3.9-3.120:4.3.9-3.12
Red Hat:enterprise_linux:4::asphp-pearbefore 0:4.3.9-3.120:4.3.9-3.12
Red Hat:enterprise_linux:4::asphp-pgsqlbefore 0:4.3.9-3.120:4.3.9-3.12
Red Hat:enterprise_linux:4::asphp-snmpbefore 0:4.3.9-3.120:4.3.9-3.12
Red Hat:enterprise_linux:4::asphp-xmlrpcbefore 0:4.3.9-3.120:4.3.9-3.12

Same product

php: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-4577Argument Injection in PHP-CGIKEV
    99Now
  • CVE-2019-11043Underflow in PHP-FPM can lead to RCEKEV
    99Now
  • CVE-2012-1823sapi/cgi/cgi_main.c in PHP before 5.3.12 and 5.4.x before 5.4.2, when configured as a CGI script (aka php-cgi), does not properly handle…KEV
    99Now

Published before and after this one in the same product

  • ← EarlierCVE-2003-0249Dec 31, 2003 · PHP treats unknown methods such as "PoSt" as a GET request, which could allow attackers to intended access restrictions if PHP is running…
    30Monitor
  • ← EarlierCVE-2003-1302Dec 31, 2003 · The IMAP functionality in PHP before 4.3.1 allows remote attackers to cause a denial of service via an e-mail message with a (1) To or (2)…
    20Monitor
  • Later →CVE-2004-0595Jul 27, 2004 · The strip_tags function in PHP 4.x up to 4.3.7, and 5.x up to 5.0.0RC3, does not filter null (\0) characters within tag names when…
    41Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
red hat:php0:4.3.2-30.ent · Red Hat:enterprise_linux:3::asPackage registry (OSV)
red hat:php-debuginfo0:4.3.2-30.ent · Red Hat:enterprise_linux:3::asPackage registry (OSV)
red hat:php-devel0:4.3.2-30.ent · Red Hat:enterprise_linux:3::asPackage registry (OSV)
red hat:php-domxml0:4.3.9-3.12 · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:php-gd0:4.3.9-3.12 · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:php-imap0:4.3.2-30.ent · Red Hat:enterprise_linux:3::asPackage registry (OSV)
red hat:php-ldap0:4.3.2-30.ent · Red Hat:enterprise_linux:3::asPackage registry (OSV)
red hat:php-mbstring0:4.3.9-3.12 · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:php-mysql0:4.3.2-30.ent · Red Hat:enterprise_linux:3::asPackage registry (OSV)
red hat:php-ncurses0:4.3.9-3.12 · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:php-odbc0:4.3.2-30.ent · Red Hat:enterprise_linux:3::asPackage registry (OSV)
red hat:php-pgsql0:4.3.2-30.ent · Red Hat:enterprise_linux:3::asPackage 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.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
P · the service can be disrupted
Attack complexity
Low
Confidentiality impact
None
Integrity impact
None
Availability impact
P

Weakness class (CWE)

—

CVSS vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

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.

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records