CVE-2011-4415
Estado: ModificadaBaja (1.2)—💥 Exploit
The ap_pregsub function in server/util.c in the Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x through 2.2.21, when the mod_setenvif module is enabled, does not restrict the size of values of environment variables, which allows local users to cause a denial of service (memory consumption or NULL pointer dereference) via a .htaccess file with a crafted SetEnvIf directive, in conjunction with a crafted HTTP request header, related to (1) the "len +=" statement and (2) the apr_pcalloc function call, a different vulnerability than CVE-2011-3607.
CVSS
- Versión: 2.0
- Vector: AV:L/AC:H/Au:N/C:N/I:N/A:P
- Puntuación base: 1.2
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 3.02%
- Percentil entre todas las CVEs puntuadas: 87
- Fecha de la puntuación: 7/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
💥 Exploits públicos
Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.
- Publicado en Exploit-DB · Apache < 2.0.64 / < 2.2.21 mod_setenvif - Integer Overflow (2/11/2011)
Tecnologías afectadas (1)
CWE
- CWE-20
Referencias
- http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041
- http://www.gossamer-threads.com/lists/apache/dev/403775
- http://www.halfdog.net/Security/2011/ApacheModSetEnvIfIntegerOverflow/
- http://www.halfdog.net/Security/2011/ApacheModSetEnvIfIntegerOverflow/DemoExploit.html
- http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041
- http://www.gossamer-threads.com/lists/apache/dev/403775
- http://www.halfdog.net/Security/2011/ApacheModSetEnvIfIntegerOverflow/
- http://www.halfdog.net/Security/2011/ApacheModSetEnvIfIntegerOverflow/DemoExploit.html
JSON original (NVD)
Mostrar
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