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    CVE-2005-2700

    ssl_engine_kernel.c in mod_ssl before 2.8.24, when using "SSLVerifyClient optional" in the global virtual host configuration, does not properly enforce "SSLVerifyClient require" in a per-location context, which allows remote attackers to bypass intended access restrictions.

    Published:Aug 30, 2005
    Last Modified:Apr 16, 2026
    EPS:Sep 6, 2005
    EPSS Score:0.15081
    CVSS Score:10

    Affected Products

    Vendor
    Apache
    Product
    Http Server
    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Stronghold
    Vendor
    Redhat
    Product
    Stronghold

    Exploits

    No exploit reference

    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

    http://lists.trustix.org/pipermail/tsl-announce/2005-October/000354.html
    http://marc.info/?l=apache-modssl&m=112569517603897&w=2
    http://marc.info/?l=bugtraq&m=112604765028607&w=2
    http://marc.info/?l=bugtraq&m=112870296926652&w=2
    http://people.apache.org/~jorton/CAN-2005-2700.diff
    http://secunia.com/advisories/16700
    http://secunia.com/advisories/16705
    http://secunia.com/advisories/16714
    http://secunia.com/advisories/16743
    http://secunia.com/advisories/16746
    http://secunia.com/advisories/16748
    http://secunia.com/advisories/16753
    http://secunia.com/advisories/16754
    http://secunia.com/advisories/16769
    http://secunia.com/advisories/16771
    http://secunia.com/advisories/16789
    http://secunia.com/advisories/16864
    http://secunia.com/advisories/16956
    http://secunia.com/advisories/17088
    http://secunia.com/advisories/17288
    http://secunia.com/advisories/17311
    http://secunia.com/advisories/17813
    http://secunia.com/advisories/19072
    http://secunia.com/advisories/19073
    http://secunia.com/advisories/21848
    http://secunia.com/advisories/22523
    http://sunsolve.sun.com/search/document.do?assetkey=1-26-102197-1
    http://sunsolve.sun.com/search/document.do?assetkey=1-26-102198-1
    http://support.avaya.com/elmodocs2/security/ASA-2006-081.htm
    http://www.debian.org/security/2005/dsa-805
    http://www.debian.org/security/2005/dsa-807
    http://www.gentoo.org/security/en/glsa/glsa-200509-12.xml
    http://www.kb.cert.org/vuls/id/744929
    http://www.mandriva.com/security/advisories?name=MDKSA-2005:161
    http://www.novell.com/linux/security/advisories/2005_51_apache2.html
    http://www.novell.com/linux/security/advisories/2005_52_apache2.html
    http://www.osvdb.org/19188
    http://www.redhat.com/support/errata/RHSA-2005-608.html
    http://www.redhat.com/support/errata/RHSA-2005-773.html
    http://www.redhat.com/support/errata/RHSA-2005-816.html
    http://www.securityfocus.com/bid/14721
    http://www.ubuntu.com/usn/usn-177-1
    http://www.vupen.com/english/advisories/2005/1625
    http://www.vupen.com/english/advisories/2005/2659
    http://www.vupen.com/english/advisories/2006/0789
    http://www.vupen.com/english/advisories/2006/4207
    http://www14.software.ibm.com/webapp/set2/subscriptions/pqvcmjd?mode=18&ID=3117
    https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=167195
    https://lists.apache.org/thread.html/117bc3f09847ebf020b1bb70301ebcc105ddc446856150b63f37f8eb%40%3Cdev.httpd.apache.org%3E
    https://lists.apache.org/thread.html/54a42d4b01968df1117cea77fc53d6beb931c0e05936ad02af93e9ac%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/5b1e7d66c5adf286f14f6cc0f857b6fca107444f68aed9e70eedab47%40%3Cdev.httpd.apache.org%3E
    https://lists.apache.org/thread.html/5df9bfb86a3b054bb985a45ff9250b0332c9ecc181eec232489e7f79%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/r5001ecf3d6b2bdd0b732e527654248abb264f08390045d30709a92f6%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/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/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%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/reb542d2038e9c331506e0cbff881b47e40fbe2bd93ff00979e60cdf7%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E
    https://lists.opensuse.org/opensuse-security-announce/2006-09/msg00016.html
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10416
    http://lists.trustix.org/pipermail/tsl-announce/2005-October/000354.html
    http://marc.info/?l=apache-modssl&m=112569517603897&w=2
    http://marc.info/?l=bugtraq&m=112604765028607&w=2
    http://marc.info/?l=bugtraq&m=112870296926652&w=2
    http://people.apache.org/~jorton/CAN-2005-2700.diff
    http://secunia.com/advisories/16700
    http://secunia.com/advisories/16705
    http://secunia.com/advisories/16714
    http://secunia.com/advisories/16743
    http://secunia.com/advisories/16746
    http://secunia.com/advisories/16748
    http://secunia.com/advisories/16753
    http://secunia.com/advisories/16754
    http://secunia.com/advisories/16769
    http://secunia.com/advisories/16771
    http://secunia.com/advisories/16789
    http://secunia.com/advisories/16864
    http://secunia.com/advisories/16956
    http://secunia.com/advisories/17088
    http://secunia.com/advisories/17288
    http://secunia.com/advisories/17311
    http://secunia.com/advisories/17813
    http://secunia.com/advisories/19072
    http://secunia.com/advisories/19073
    http://secunia.com/advisories/21848
    http://secunia.com/advisories/22523
    http://sunsolve.sun.com/search/document.do?assetkey=1-26-102197-1
    http://sunsolve.sun.com/search/document.do?assetkey=1-26-102198-1
    http://support.avaya.com/elmodocs2/security/ASA-2006-081.htm
    http://www.debian.org/security/2005/dsa-805
    http://www.debian.org/security/2005/dsa-807
    http://www.gentoo.org/security/en/glsa/glsa-200509-12.xml
    http://www.kb.cert.org/vuls/id/744929
    http://www.mandriva.com/security/advisories?name=MDKSA-2005:161
    http://www.novell.com/linux/security/advisories/2005_51_apache2.html
    http://www.novell.com/linux/security/advisories/2005_52_apache2.html
    http://www.osvdb.org/19188
    http://www.redhat.com/support/errata/RHSA-2005-608.html
    http://www.redhat.com/support/errata/RHSA-2005-773.html
    http://www.redhat.com/support/errata/RHSA-2005-816.html
    http://www.securityfocus.com/bid/14721
    http://www.ubuntu.com/usn/usn-177-1
    http://www.vupen.com/english/advisories/2005/1625
    http://www.vupen.com/english/advisories/2005/2659
    http://www.vupen.com/english/advisories/2006/0789
    http://www.vupen.com/english/advisories/2006/4207
    http://www14.software.ibm.com/webapp/set2/subscriptions/pqvcmjd?mode=18&ID=3117
    https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=167195
    https://lists.apache.org/thread.html/117bc3f09847ebf020b1bb70301ebcc105ddc446856150b63f37f8eb%40%3Cdev.httpd.apache.org%3E
    https://lists.apache.org/thread.html/54a42d4b01968df1117cea77fc53d6beb931c0e05936ad02af93e9ac%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/5b1e7d66c5adf286f14f6cc0f857b6fca107444f68aed9e70eedab47%40%3Cdev.httpd.apache.org%3E
    https://lists.apache.org/thread.html/5df9bfb86a3b054bb985a45ff9250b0332c9ecc181eec232489e7f79%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/r5001ecf3d6b2bdd0b732e527654248abb264f08390045d30709a92f6%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/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/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%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/reb542d2038e9c331506e0cbff881b47e40fbe2bd93ff00979e60cdf7%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E
    https://lists.opensuse.org/opensuse-security-announce/2006-09/msg00016.html
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10416

    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