According to the versions of the httpd packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - In Apache HTTP Server 2.4 release 2.4.37 and prior,     mod_session checks the session expiry time before     decoding the session. This causes session expiry time     to be ignored for mod_session_cookie sessions since the     expiry time is loaded when the session is     decoded.(CVE-2018-17199)

  - In Apache HTTP Server 2.4.18-2.4.39, using fuzzed     network input, the http/2 session handling could be     made to read memory after being freed, during     connection shutdown.(CVE-2019-10082)

  - HTTP/2 (2.4.20 through 2.4.39) very early pushes, for     example configured with 'H2PushResource', could lead to     an overwrite of memory in the pushing request's pool,     leading to crashes. The memory copied is that of the     configured push link header values, not data supplied     by the client.(CVE-2019-10081)

  - Some HTTP/2 implementations are vulnerable to     unconstrained interal data buffering, potentially     leading to a denial of service. The attacker opens the     HTTP/2 window so the peer can send without constraint     however, they leave the TCP window closed so the peer     cannot actually write (many of) the bytes on the wire.
    The attacker then sends a stream of requests for a     large response object. Depending on how the servers     queue the responses, this can consume excess memory,     CPU, or both.(CVE-2019-9517)

  - In Apache HTTP Server 2.4.32-2.4.39, when mod_remoteip     was configured to use a trusted intermediary proxy     server using the 'PROXY' protocol, a specially crafted     PROXY header could trigger a stack buffer overflow or     NULL pointer deference. This vulnerability could only     be triggered by a trusted proxy and not by untrusted     HTTP clients.(CVE-2019-10097)

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

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:4751 advisory.

    The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

    The following packages have been upgraded to a later upstream version: mod_http2 (1.15.7). (BZ#1814236)

    Security Fix(es):

    * httpd: memory corruption on early pushes (CVE-2019-10081)

    * httpd: read-after-free in h2 connection shutdown (CVE-2019-10082)

    * httpd: null-pointer dereference in mod_remoteip (CVE-2019-10097)

    * httpd: mod_rewrite configurations vulnerable to open redirect (CVE-2020-1927)

    * httpd: mod_http2: DoS via slow, unneeded request bodies (CVE-2018-17189)

    * httpd: mod_http2: read-after-free on a string compare (CVE-2019-0196)

    * httpd: mod_http2: possible crash on late upgrade (CVE-2019-0197)

    * httpd: limited cross-site scripting in mod_proxy error page (CVE-2019-10092)

    * httpd: mod_rewrite potential open redirect (CVE-2019-10098)

    * httpd: mod_proxy_ftp use of uninitialized value (CVE-2020-1934)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.3 Release Notes     linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

This update for apache2 fixes the following issues :

Security issues fixed :

CVE-2019-9517: Fixed HTTP/2 implementations that are vulnerable to unconstrained interal data buffering (bsc#1145575).

CVE-2019-10081: Fixed mod_http2 that is vulnerable to memory corruption on early pushes (bsc#1145742).

CVE-2019-10082: Fixed mod_http2 that is vulnerable to read-after-free in h2 connection shutdown (bsc#1145741).

CVE-2019-10092: Fixed limited cross-site scripting in mod_proxy (bsc#1145740).

CVE-2019-10098: Fixed mod_rewrite configuration vulnerablility to open redirect (bsc#1145738).

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

An update of the httpd package has been released.

遠端 CentOS Linux 8 主機上安裝的套件受到 CESA-2020: 4751 公告中所提及的多個弱點影響。

  - httpd：mod_http2：透過緩慢且不需要的要求內文造成 DoS (CVE-2018-17189)

  - httpd：mod_http2：執行字串比較時發生釋放後讀取 (CVE-2019-0196)

  - httpd：mod_http2：執行最新更新時可能發生當機 (CVE-2019-0197)

  - httpd：早期推送中發生記憶體損壞 (CVE-2019-10081)

  - httpd：h2 連接關閉中存在釋放後讀取問題 (CVE-2019-10082)

  - httpd：mod_proxy 錯誤頁面中存在受限的跨網站指令碼 (CVE-2019-10092)

  - httpd：mod_remoteip 中存在 NULL 指標解除參照問題 (CVE-2019-10097)

  - httpd：mod_rewrite 中可能存在開放重新導向 (CVE-2019-10098)

  - httpd：mod_rewrite 組態容易受到開放重新導向影響 (CVE-2020-1927)

  - httpd：mod_proxy_ftp 使用未初始化的值 (CVE-2020-1934)

請注意，Nessus 並未測試這些問題，而是僅依據應用程式自我報告的版本號碼作出判斷。

遠端主機上安裝的 Apache httpd 版本早於 2.4.41。因此，該軟體受到 2.4.41 公告中所提及的多個弱點影響，包括下列項目：

  - 據報告，存在跨網站指令碼問題，可影響 mod_proxy 錯誤頁面。攻擊者可造成錯誤頁面上的連結格式錯誤，使連結指向其選擇的頁面。只有在伺服器設定為啟用代理，但因配置不當而顯示「代理錯誤」頁面時，才可利用此漏洞。(CVE-2019-10092)

  - HTTP/2 (2.4.20 到 2.4.39) 非常早期的推送 (例如，使用 H2PushResource 組態) 可導致在推送要求的集區中覆寫記憶體，進而導致當機。複製的是組態之推送連結標頭值的記憶體，而非用戶端提供的資料。(CVE-2019-10081)

  - 部分 HTTP/2 實作容易受到不受限制的內部資料緩衝影響，進而可能導致拒絕服務。攻擊者會開啟 HTTP/2 視窗，使對等端可以不受限制地傳送；
    但是它們會關閉 TCP 視窗，這樣對等端在連線時，就無法實際寫入 (許多) 位元組。接著，攻擊者會針對大型回應物件傳送要求串流。根據伺服器佇列回應的方式，這可能會消耗過量的記憶體或 CPU，或是兩者都過度消耗。(CVE-2019-9517)

請注意，Nessus 並未測試此問題，而是僅依據應用程式自我報告的版本號碼。

遠端主機受到 GLSA-201909-04 中所述的弱點影響 (Apache：多個弱點) 在 Apache 中發現多個弱點。如需詳細資訊，請檢閱以下提及的 CVE 識別碼。影響：如需詳細資料，請檢閱提及的 CVE 識別碼。因應措施：目前尚無已知的因應措施。

現已提供適用於 Slackware 14.0、14.1、14.2 和
最新版本的新 httpd 套件，可修正安全性問題。

ID	Name	Product	Family	Published	Updated	Severity
135146	EulerOS Virtualization for ARM 64 3.0.6.0 : httpd (EulerOS-SA-2020-1359)	Nessus	Huawei Local Security Checks	4/2/2020	3/20/2024	critical
142397	RHEL 8 : httpd:2.4 (RHSA-2020:4751)	Nessus	Red Hat Local Security Checks	11/4/2020	6/3/2024	critical
128612	SUSE SLES12 Security Update : apache2 (SUSE-SU-2019:2329-1) (Internal Data Buffering)	Nessus	SuSE Local Security Checks	9/9/2019	12/5/2022	critical
130101	Photon OS 3.0: Httpd PHSA-2019-3.0-0035	Nessus	PhotonOS Local Security Checks	10/22/2019	7/24/2024	critical
130109	Photon OS 1.0: Httpd PHSA-2019-1.0-0253	Nessus	PhotonOS Local Security Checks	10/22/2019	12/17/2019	critical
145821	CentOS 8：httpd：2.4 (CESA-2020: 4751)	Nessus	CentOS Local Security Checks	2/1/2021	2/8/2023	critical
128033	Apache 2.4.x < 2.4.41 多個弱點	Nessus	Web Servers	8/20/2019	12/5/2022	critical
128593	GLSA-201909-04：Apache：多個弱點 (內部資料緩衝)	Nessus	Gentoo Local Security Checks	9/9/2019	12/6/2022	critical
135160	Slackware 14.0 / 14.1 / 14.2 / 最新版本：httpd (SSA:2020-091-02) (內部資料緩衝)	Nessus	Slackware Local Security Checks	4/2/2020	12/5/2022	critical

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