CVE-2003-0166

highpriority · attend · 45EPSS 0.141 · 97 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

3 exploits · functional

Likely / severe?

14.1% (97th) EPSS

CVSS 7.5 · high

Is it mine?

18 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-27

Integer signedness error in emalloc() function for PHP before 4.3.2 allow remote attackers to cause a denial of service (memory consumption) and possibly execute arbitrary code via negative arguments to functions such as (1) socket_recv, (2) socket_recvfrom, and possibly other functions.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–7.5

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v2.06.8mediumAV:N/AC:L/Au:N/C:P/I:P/A:P/E:POCsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-195USLLM-inferredCWE-20USLLM-inferred

exploits (3)

Public proof-of-concept and weaponised exploit code.

EDB-22419PHP 4.3 - 'socket_iovec_alloc()' Integer Overflowfunctional · exploit_db
EDB-22425PHP 4.x - 'socket_recv()' Signed Integer Memory Corruptionfunctional · exploit_db
EDB-22426PHP 4.x - 'socket_recvfrom()' Signed Integer Memory Corruptionfunctional · exploit_db

affected products (18)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
php php= 4.0nvdUScpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php= 4.0.1nvdUScpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php= 4.0.2nvdUScpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php= 4.0.3nvdUScpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php= 4.0.4nvdUScpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php= 4.0.5nvdUScpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php= 4.0.6nvdUScpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php= 4.0.7nvdUScpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php= 4.1.0nvdUScpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php= 4.1.1nvdUScpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php= 4.1.2nvdUScpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php= 4.2.0nvdUScpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php= 4.2.1nvdUScpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php= 4.2.2nvdUScpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php= 4.2.3nvdUScpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php= 4.3.0nvdUScpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php= 4.3.1nvdUScpe:2.3:a:php:php:*:*:*:*:*:*:*:*

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 2003-04-02modified 2026-06-16

references (12)

External citations — patches, advisories, analysis.

scry

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