The remote host appears to be running a version of Apache that is prior to 2.0.55. It is, therefore affected by multiple vulnerabilities :

  - A security issue exists where 'SSLVerifyClient' is not     enforced in per-location context if 'SSLVerifyClient     optional' is configured in the vhost configuration.
    (CVE-2005-2700)

  - A denial of service vulnerability exists when processing     a large byte range request, as well as a flaw in the     'worker.c' module which could allow an attacker to force     this service to consume excessive amounts of memory.
    (CVE-2005-2970)

  - When Apache is acting as a proxy, it is possible for a     remote attacker to poison the web cache, bypass web     application firewall protection, and conduct cross-site     scripting attacks via an HTTP request with both a     'Transfer-Encoding: chunked' header and a     'Content-Length' header. (CVE-2005-2088)

  - Multiple integer overflows exists in PCRE in quantifier     parsing which could be triggered by a local user through     use of a specially crafted regex in an .htaccess file.
    (CVE-2005-2491)

  - An issue exists where the byte range filter buffers     responses into memory. (CVE-2005-2728)

  - An off-by-one overflow exists in mod_ssl while printing     CRL information at 'LogLevel debug' which could be     triggered if configured to use a 'malicious CRL'.
    (CVE-2005-1268)

A memory leak in the worker MPM in Apache 2 could allow remote attackers to cause a Denial of Service (memory consumption) via aborted commands in certain circumstances, which prevents the memory for the transaction pool from being reused for other connections.

As well, this update addresses two bugs in the Mandriva 2006 Apache packges where apachectl was missing and also a segfault that occured when using the mod_ldap module.

リモートホストは、2.0.55 より古いバージョンの Apache を実行しているようです。そのため、以下の複数の脆弱性の影響を受けます。

  - 「SSLVerifyClient オプション」が vhost 構成で構成されている場合に、「SSLVerifyClient」が位置コンテキストで実施されないセキュリティ問題があります。
    （CVE-2005-2700）

  - 大きなバイト範囲のリクエストを処理する際にサービス拒否脆弱性があるとともに、「worker.c」モジュールに欠陥があり、これによって攻撃者が、このサービスを強制して、過剰なメモリ量を消費できることがあります。
    （CVE-2005-2970）

  - Apache はプロキシとして動作している場合、リモート攻撃者は、「転送エンコード：チャンク」ヘッダーと「コンテンツ長」ヘッダーの両方が含まれている HTTP リクエスト経由で、Web キャッシュを汚染し、Web アプリケーションのファイアウォール保護をバイパスし、クロスサイトスクリプティング攻撃を行うことができます。（CVE-2005-2088）

  - 複数の整数オーバーフローが修飾子解析の PCRE にあり、これは、.htaccess ファイルの特別に作り上げられた RegEx の使用を介して、ローカルユーザーによってトリガされることがあります。
    （CVE-2005-2491）

  - バイト範囲フィルタがメモリへの応答をバッファリングする問題があります。（CVE-2005-2728）

  - 「LogLevel デバッグ」で CRL 情報をプリントする際に mod_ssl にオフバイワンオーバーフローがあり、これは、「悪意のある CRL」を使用するように構成されている場合に、トリガされることがあります。
    （CVE-2005-1268）

远程主机运行的 Apache 版本似乎低于 2.0.55。因此，它受到多种漏洞的影响：

  - 如果在 vhost 配置中配置了“SSLVerifyClient optional”选项，未强制“SSLVerifyClient”的按位置上下文中存在安全问题。
    (CVE-2005-2700)

  - 处理大字节范围请求时存在拒绝服务漏洞，并且“worker.c”模块中存在一个缺陷，攻击者可利用这些漏洞，强制此服务消耗过量内存。
    (CVE-2005-2970)

  - Apache 充当代理时，远程攻击者可通过同时包含“Transfer-Encoding: chunked”标头和“Content-Length”标头的 HTTP 请求，造成 Web 缓存中毒、绕过 Web 应用程序防火墙保护以及发动跨站脚本攻击。(CVE-2005-2088)

  - 在限定符解析时，PCRE 中存在多个整数溢出，本地用户可通过使用 .htaccess 文件中特别构建的 regex 触发这些问题。
    (CVE-2005-2491)

  - 字节范围过滤器将响应缓存到内存时存在问题。(CVE-2005-2728)

  - 打印“LogLevel 调试”中的 CRL 信息时，mod_ssl 中存在差一溢出，在配置为使用“恶意 CRL”时可触发此问题。
    (CVE-2005-1268)

遠端主機正在執行的 Apache  版本似乎比 2.0.55 舊。因此受到多個弱點影響：

  - 若 vhost 的設定設為「SSLVerifyClient optional」，則安全性問題會存於未在每一位置內容強制採用「SSLVerifyClient」的位置。
    (CVE-2005-2700)

  - 在處理具有大位元組範圍的要求時，存在拒絕服務弱點，此外「worker.c」模組中也有一個瑕疵，攻擊者可以利用這些問題強制此服務占用過量記憶體。
    (CVE-2005-2970)

  - 當 Apache 用作 Proxy 時，遠端攻擊者可以損壞 Web 快取、繞過 Web 應用程式防火牆保護，並透過具有「Transfer-Encoding: chunked」標頭和「Content-Length」標頭的 HTTP 要求發動跨網站指令碼攻擊。(CVE-2005-2088)

  - 在剖析數量詞時，PCRE 中存在多個整數溢位問題，本機使用者可藉由在 .htaccess 檔案內使用特製的 RegEx 來觸發這些問題。
    (CVE-2005-2491)

  - 位元組範圍篩選器將回應緩衝至記憶體時存在問題。(CVE-2005-2728)

  - 在「LogLevel debug」列印 CRL 資訊時，mod_ssl 中會發生差一緩衝區溢位問題，當設定為使用 [惡意 CRL] 時可觸發此問題。
    (CVE-2005-1268)

Updated Apache httpd packages that correct three security issues are now available for Red Hat Enterprise Linux 3 and 4.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

The Apache HTTP Server is a popular and freely-available Web server.

A memory leak in the worker MPM could allow remote attackers to cause a denial of service (memory consumption) via aborted connections, which prevents the memory for the transaction pool from being reused for other connections. The Common Vulnerabilities and Exposures project assigned the name CVE-2005-2970 to this issue. This vulnerability only affects users who are using the non-default worker MPM.

A flaw in mod_imap when using the Referer directive with image maps was discovered. With certain site configurations, a remote attacker could perform a cross-site scripting attack if a victim can be forced to visit a malicious URL using certain web browsers. (CVE-2005-3352)

A NULL pointer dereference flaw in mod_ssl was discovered affecting server configurations where an SSL virtual host is configured with access control and a custom 400 error document. A remote attacker could send a carefully crafted request to trigger this issue which would lead to a crash. This crash would only be a denial of service if using the non-default worker MPM. (CVE-2005-3357)

Users of httpd should update to these erratum packages which contain backported patches to correct these issues along with some additional bugs.

This update includes fixes for three security issues in the Apache HTTP Server.

A memory leak in the worker MPM could allow remote attackers to cause a denial of service (memory consumption) via aborted connections, which prevents the memory for the transaction pool from being reused for other connections. The Common Vulnerabilities and Exposures project assigned the name CVE-2005-2970 to this issue. This vulnerability only affects users who are using the non-default worker MPM.

A flaw in mod_imap when using the Referer directive with image maps was discovered. With certain site configurations, a remote attacker could perform a cross-site scripting attack if a victim can be forced to visit a malicious URL using certain web browsers. (CVE-2005-3352)

A NULL pointer dereference flaw in mod_ssl was discovered affecting server configurations where an SSL virtual host is configured with access control and a custom 400 error document. A remote attacker could send a carefully crafted request to trigger this issue which would lead to a crash. This crash would only be a denial of service if using the non-default worker MPM. (CVE-2005-3357)

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

A memory leak was found in the Apache 2 'worker' module in the handling of aborted TCP connections. By repeatedly triggering this situation, a remote attacker could drain all available memory, which eventually led to a Denial of Service.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	名前	製品	ファミリー	公開日	更新日	深刻度
31656	Apache < 2.0.55 Multiple Vulnerabilities	Nessus	Web Servers	2008/3/26	2018/6/29	high
20464	Mandrake Linux Security Advisory : apache2 (MDKSA-2005:233)	Nessus	Mandriva Local Security Checks	2006/1/15	2021/1/6	medium
31656	Apache < 2.0.55 の複数の脆弱性	Nessus	Web Servers	2008/3/26	2018/6/29	high
31656	Apache < 2.0.55 多种漏洞	Nessus	Web Servers	2008/3/26	2018/6/29	high
31656	Apache < 2.0.55 多種弱點	Nessus	Web Servers	2008/3/26	2018/6/29	high
20398	RHEL 3 / 4 : httpd (RHSA-2006:0159)	Nessus	Red Hat Local Security Checks	2006/1/11	2021/1/14	medium
21884	CentOS 3 / 4 : httpd (CESA-2006:0159)	Nessus	CentOS Local Security Checks	2006/7/3	2021/1/4	medium
20757	Fedora Core 4 : httpd-2.0.54-10.3 (2006-052)	Nessus	Fedora Local Security Checks	2006/1/21	2021/1/11	medium
20768	Ubuntu 4.10 / 5.04 / 5.10 : apache2 vulnerability (USN-225-1)	Nessus	Ubuntu Local Security Checks	2006/1/21	2021/1/19	medium

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