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    CVE-2007-3304

    Apache httpd 1.3.37, 2.0.59, and 2.2.4 with the Prefork MPM module, allows local users to cause a denial of service by modifying the worker_score and process_score arrays to reference an arbitrary process ID, which is sent a SIGUSR1 signal from the master process, aka "SIGUSR1 killer."

    Published:Jun 19, 2007
    Last Modified:Apr 23, 2026
    EPS:Jun 20, 2007
    EPSS Score:0.00098
    CVSS Score:4.7

    Affected Products

    Vendor
    Apache
    Product
    Http Server
    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Redhat
    Product
    Certificate System
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Linux Desktop
    Vendor
    Redhat
    Product
    Enterprise Linux Server
    Vendor
    Redhat
    Product
    Enterprise Linux Workstation
    Vendor
    Redhat
    Product
    Network Proxy
    Vendor
    Redhat
    Product
    Network Satellite
    Vendor
    Redhat
    Product
    Rhel Application Stack

    Exploits

    http://securityreason.com/securityalert/2814http://securityreason.com/securityalert/2814

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-48913 (CVSS 7.3) — Use After Free vulnerability in Apache HTTP Server module mod_http2 when file handles are already exhausted. …
    CVE-2026-42536 (CVSS 7.5) — Heap-based Buffer Overflow vulnerability in Apache HTTP Server with mod_xml2enc, xml2StartParse, and untrusted…
    CVE-2026-44185 (CVSS 7.3) — Buffer Over-read vulnerability in Apache HTTP Server via outbound OCSP requests to an attacker controlled OCSP…
    CVE-2026-34355 (CVSS 7.5) — A buffer overflow in mod_proxy_html in Apache HTTP Server 2.4.67 and earlier allows an attack by an untrusted …
    CVE-2026-44631 (CVSS 9.8) — Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration. Th…
    CVE-2026-44119 (CVSS 5.5) — Improper Privilege Management vulnerability in Apache HTTP Server 2.4.67 and earlier allows local .htaccess au…
    CVE-2026-43951 (CVSS 6.5) — Out-of-bounds Read vulnerability in Apache HTTP Server with mod_headers and mod_mime and multiple response lan…
    CVE-2026-42535 (CVSS 9.1) — A path handling issue in mod_dav_fs in Apache 2.4.67 and earlier allows a WebDAV content author to directly ma…
    CVE-2026-34356 (CVSS 7.5) — Heap-based Buffer Overflow vulnerability in Apache HTTP Server with malicious backend servers and ProxyPassRev…
    CVE-2026-44186 (CVSS 7.3) — Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in the mod_proxy_ftp module in Apache HTT…

    References

    ftp://patches.sgi.com/support/free/security/advisories/20070701-01-P.asc
    http://bugs.gentoo.org/show_bug.cgi?id=186219
    http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=245111
    http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01182588
    http://httpd.apache.org/security/vulnerabilities_13.html
    http://httpd.apache.org/security/vulnerabilities_20.html
    http://httpd.apache.org/security/vulnerabilities_22.html
    http://lists.vmware.com/pipermail/security-announce/2009/000062.html
    http://mail-archives.apache.org/mod_mbox/httpd-dev/200706.mbox/%3c20070629141032.GA15192%40redhat.com%3e
    http://marc.info/?l=apache-httpd-dev&m=118252946632447&w=2
    http://osvdb.org/38939
    http://rhn.redhat.com/errata/RHSA-2007-0556.html
    http://secunia.com/advisories/25827
    http://secunia.com/advisories/25830
    http://secunia.com/advisories/25920
    http://secunia.com/advisories/26211
    http://secunia.com/advisories/26273
    http://secunia.com/advisories/26443
    http://secunia.com/advisories/26508
    http://secunia.com/advisories/26611
    http://secunia.com/advisories/26759
    http://secunia.com/advisories/26790
    http://secunia.com/advisories/26822
    http://secunia.com/advisories/26842
    http://secunia.com/advisories/26993
    http://secunia.com/advisories/27121
    http://secunia.com/advisories/27209
    http://secunia.com/advisories/27563
    http://secunia.com/advisories/27732
    http://secunia.com/advisories/28212
    http://secunia.com/advisories/28224
    http://secunia.com/advisories/28606
    http://security.gentoo.org/glsa/glsa-200711-06.xml
    http://security.psnc.pl/files/apache_report.pdf
    http://securityreason.com/securityalert/2814
    http://sunsolve.sun.com/search/document.do?assetkey=1-26-103179-1
    http://sunsolve.sun.com/search/document.do?assetkey=1-66-200032-1
    http://support.avaya.com/elmodocs2/security/ASA-2007-353.htm
    http://support.avaya.com/elmodocs2/security/ASA-2007-363.htm
    http://svn.apache.org/viewvc?view=rev&revision=547987
    http://www-1.ibm.com/support/docview.wss?uid=swg1PK52702
    http://www-1.ibm.com/support/docview.wss?uid=swg1PK53984
    http://www-1.ibm.com/support/search.wss?rs=0&q=PK50467&apar=only
    http://www.fujitsu.com/global/support/software/security/products-f/interstage-200802e.html
    http://www.mandriva.com/security/advisories?name=MDKSA-2007:140
    http://www.mandriva.com/security/advisories?name=MDKSA-2007:142
    http://www.novell.com/linux/security/advisories/2007_61_apache2.html
    http://www.redhat.com/archives/fedora-package-announce/2007-September/msg00320.html
    http://www.redhat.com/errata/RHSA-2007-0532.html
    http://www.redhat.com/support/errata/RHSA-2007-0557.html
    http://www.redhat.com/support/errata/RHSA-2007-0662.html
    http://www.redhat.com/support/errata/RHSA-2008-0261.html
    http://www.securityfocus.com/archive/1/469899/100/0/threaded
    http://www.securityfocus.com/archive/1/471832/100/0/threaded
    http://www.securityfocus.com/archive/1/505990/100/0/threaded
    http://www.securityfocus.com/bid/24215
    http://www.securitytracker.com/id?1018304
    http://www.trustix.org/errata/2007/0026/
    http://www.ubuntu.com/usn/usn-499-1
    http://www.vupen.com/english/advisories/2007/2727
    http://www.vupen.com/english/advisories/2007/3100
    http://www.vupen.com/english/advisories/2007/3283
    http://www.vupen.com/english/advisories/2007/3420
    http://www.vupen.com/english/advisories/2007/3494
    http://www.vupen.com/english/advisories/2007/4305
    http://www.vupen.com/english/advisories/2008/0233
    https://exchange.xforce.ibmcloud.com/vulnerabilities/35095
    https://issues.rpath.com/browse/RPL-1710
    https://lists.apache.org/thread.html/54a42d4b01968df1117cea77fc53d6beb931c0e05936ad02af93e9ac%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/5df9bfb86a3b054bb985a45ff9250b0332c9ecc181eec232489e7f79%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r0276683d8e1e07153fc8642618830ac0ade85b9ae0dc7b07f63bb8fc%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r2cb985de917e7da0848c440535f65a247754db8b2154a10089e4247b%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r476d175be0aaf4a17680ef98c5153b4d336eaef76fb2224cc94c463a%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r5419c9ba0951ef73a655362403d12bb8d10fab38274deb3f005816f5%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r5f9c22f9c28adbd9f00556059edc7b03a5d5bb71d4bb80257c0d34e4%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r652fc951306cdeca5a276e2021a34878a76695a9f3cfb6490b4a6840%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r8828e649175df56f1f9e3919938ac7826128525426e2748f0ab62feb%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r9e8622254184645bc963a1d47c5d47f6d5a36d6f080d8d2c43b2b142%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/rad01d817195e6cc871cb1d73b207ca326379a20a6e7f30febaf56d24%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/rafd145ba6cd0a4ced113a5823cdaff45aeb36eb09855b216401c66d6%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/rb9c9f42dafa25d2f669dac2a536a03f2575bc5ec1be6f480618aee10%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/reb542d2038e9c331506e0cbff881b47e40fbe2bd93ff00979e60cdf7%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11589
    ftp://patches.sgi.com/support/free/security/advisories/20070701-01-P.asc
    http://bugs.gentoo.org/show_bug.cgi?id=186219
    http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=245111
    http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01182588
    http://httpd.apache.org/security/vulnerabilities_13.html
    http://httpd.apache.org/security/vulnerabilities_20.html
    http://httpd.apache.org/security/vulnerabilities_22.html
    http://lists.vmware.com/pipermail/security-announce/2009/000062.html
    http://mail-archives.apache.org/mod_mbox/httpd-dev/200706.mbox/%3c20070629141032.GA15192%40redhat.com%3e
    http://marc.info/?l=apache-httpd-dev&m=118252946632447&w=2
    http://osvdb.org/38939
    http://rhn.redhat.com/errata/RHSA-2007-0556.html
    http://secunia.com/advisories/25827
    http://secunia.com/advisories/25830
    http://secunia.com/advisories/25920
    http://secunia.com/advisories/26211
    http://secunia.com/advisories/26273
    http://secunia.com/advisories/26443
    http://secunia.com/advisories/26508
    http://secunia.com/advisories/26611
    http://secunia.com/advisories/26759
    http://secunia.com/advisories/26790
    http://secunia.com/advisories/26822
    http://secunia.com/advisories/26842
    http://secunia.com/advisories/26993
    http://secunia.com/advisories/27121
    http://secunia.com/advisories/27209
    http://secunia.com/advisories/27563
    http://secunia.com/advisories/27732
    http://secunia.com/advisories/28212
    http://secunia.com/advisories/28224
    http://secunia.com/advisories/28606
    http://security.gentoo.org/glsa/glsa-200711-06.xml
    http://security.psnc.pl/files/apache_report.pdf
    http://securityreason.com/securityalert/2814
    http://sunsolve.sun.com/search/document.do?assetkey=1-26-103179-1
    http://sunsolve.sun.com/search/document.do?assetkey=1-66-200032-1
    http://support.avaya.com/elmodocs2/security/ASA-2007-353.htm
    http://support.avaya.com/elmodocs2/security/ASA-2007-363.htm
    http://svn.apache.org/viewvc?view=rev&revision=547987
    http://www-1.ibm.com/support/docview.wss?uid=swg1PK52702
    http://www-1.ibm.com/support/docview.wss?uid=swg1PK53984
    http://www-1.ibm.com/support/search.wss?rs=0&q=PK50467&apar=only
    http://www.fujitsu.com/global/support/software/security/products-f/interstage-200802e.html
    http://www.mandriva.com/security/advisories?name=MDKSA-2007:140
    http://www.mandriva.com/security/advisories?name=MDKSA-2007:142
    http://www.novell.com/linux/security/advisories/2007_61_apache2.html
    http://www.redhat.com/archives/fedora-package-announce/2007-September/msg00320.html
    http://www.redhat.com/errata/RHSA-2007-0532.html
    http://www.redhat.com/support/errata/RHSA-2007-0557.html
    http://www.redhat.com/support/errata/RHSA-2007-0662.html
    http://www.redhat.com/support/errata/RHSA-2008-0261.html
    http://www.securityfocus.com/archive/1/469899/100/0/threaded
    http://www.securityfocus.com/archive/1/471832/100/0/threaded
    http://www.securityfocus.com/archive/1/505990/100/0/threaded
    http://www.securityfocus.com/bid/24215
    http://www.securitytracker.com/id?1018304
    http://www.trustix.org/errata/2007/0026/
    http://www.ubuntu.com/usn/usn-499-1
    http://www.vupen.com/english/advisories/2007/2727
    http://www.vupen.com/english/advisories/2007/3100
    http://www.vupen.com/english/advisories/2007/3283
    http://www.vupen.com/english/advisories/2007/3420
    http://www.vupen.com/english/advisories/2007/3494
    http://www.vupen.com/english/advisories/2007/4305
    http://www.vupen.com/english/advisories/2008/0233
    https://exchange.xforce.ibmcloud.com/vulnerabilities/35095
    https://issues.rpath.com/browse/RPL-1710
    https://lists.apache.org/thread.html/54a42d4b01968df1117cea77fc53d6beb931c0e05936ad02af93e9ac%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/5df9bfb86a3b054bb985a45ff9250b0332c9ecc181eec232489e7f79%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r0276683d8e1e07153fc8642618830ac0ade85b9ae0dc7b07f63bb8fc%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r2cb985de917e7da0848c440535f65a247754db8b2154a10089e4247b%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r476d175be0aaf4a17680ef98c5153b4d336eaef76fb2224cc94c463a%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r5419c9ba0951ef73a655362403d12bb8d10fab38274deb3f005816f5%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r5f9c22f9c28adbd9f00556059edc7b03a5d5bb71d4bb80257c0d34e4%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r652fc951306cdeca5a276e2021a34878a76695a9f3cfb6490b4a6840%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r8828e649175df56f1f9e3919938ac7826128525426e2748f0ab62feb%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r9e8622254184645bc963a1d47c5d47f6d5a36d6f080d8d2c43b2b142%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/rad01d817195e6cc871cb1d73b207ca326379a20a6e7f30febaf56d24%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/rafd145ba6cd0a4ced113a5823cdaff45aeb36eb09855b216401c66d6%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/rb9c9f42dafa25d2f669dac2a536a03f2575bc5ec1be6f480618aee10%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/reb542d2038e9c331506e0cbff881b47e40fbe2bd93ff00979e60cdf7%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11589

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High