The remote SUSE Linux SLES15 host has a package installed that is affected by a vulnerability as referenced in the SUSE- SU-2021:3258-1 advisory.

    - CVE-2021-40346: Fixed request smuggling vulnerability in HTX (bsc#1189877).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

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

According to the versions of the haproxy package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - An integer overflow exists in HAProxy 2.0 through 2.5 in htx_add_header that can be exploited to perform     an HTTP request smuggling attack, allowing an attacker to bypass all configured http-request HAProxy ACLs     and possibly other ACLs. (CVE-2021-40346)

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 Debian 11 host has packages installed that are affected by a vulnerability as referenced in the dsa-4968 advisory.

    Ori Hollander reported that missing header name length checks in the htx_add_header() and     htx_add_trailer() functions in HAProxy, a fast and reliable load balancing reverse proxy, could result in     request smuggling attacks or response splitting attacks. Additionally this update addresses #993303     introduced in DSA 4960-1 causing HAProxy to fail serving URLs with HTTP/2 containing '//'. For the stable     distribution (bullseye), this problem has been fixed in version 2.2.9-2+deb11u2. We recommend that you     upgrade your haproxy packages. For the detailed security status of haproxy please refer to its security     tracker page at: https://security-tracker.debian.org/tracker/haproxy

Tenable has extracted the preceding description block directly from the Debian security advisory.

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

The remote CentOS Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the haproxy-2.4.7-1.el9 build changelog.

  - An issue was discovered in HAProxy 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. It does not     ensure that the scheme and path portions of a URI have the expected characters. For example, the authority     field (as observed on a target HTTP/2 server) might differ from what the routing rules were intended to     achieve. (CVE-2021-39240)

  - An issue was discovered in HAProxy 2.0 before 2.0.24, 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before     2.4.3. An HTTP method name may contain a space followed by the name of a protected resource. It is     possible that a server would interpret this as a request for that protected resource, such as in the GET     /admin? HTTP/1.1 /static/images HTTP/1.1 example. (CVE-2021-39241)

  - An issue was discovered in HAProxy 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. It can lead     to a situation with an attacker-controlled HTTP Host header, because a mismatch between Host and authority     is mishandled. (CVE-2021-39242)

  - An integer overflow exists in HAProxy 2.0 through 2.5 in htx_add_header that can be exploited to perform     an HTTP request smuggling attack, allowing an attacker to bypass all configured http-request HAProxy ACLs     and possibly other ACLs. (CVE-2021-40346)

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

The remote SUSE Linux SUSE15 host has a package installed that is affected by a vulnerability as referenced in the openSUSE-SU-2021:2975-1 advisory.

  - An integer overflow exists in HAProxy 2.0 through 2.5 in htx_add_header that can be exploited to perform     an HTTP request smuggling attack, allowing an attacker to bypass all configured http-request HAProxy ACLs     and possibly other ACLs. (CVE-2021-40346)

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

An update of the haproxy package has been released.

The remote Red Hat Enterprise Linux CoreOS 4 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2022:0114 advisory.

  - haproxy: an HTTP method name may contain a space followed by the name of a protected resource     (CVE-2021-39241)

  - haproxy: request smuggling attack or response splitting via duplicate content-length header     (CVE-2021-40346)

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

The remote Red Hat Enterprise Linux CoreOS 4 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2022:0024 advisory.

  - haproxy: an HTTP method name may contain a space followed by the name of a protected resource     (CVE-2021-39241)

  - haproxy: request smuggling attack or response splitting via duplicate content-length header     (CVE-2021-40346)

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

The remote Redhat Enterprise Linux 7 / 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2022:0114 advisory.

    Red Hat OpenShift Container Platform is Red Hat's cloud computing     Kubernetes application platform solution designed for on-premise or private     cloud deployments.

    This advisory contains the RPM packages for Red Hat OpenShift Container Platform 4.7.41. See the following     advisory for the container images for this release:

    https://access.redhat.com/errata/RHBA-2022:0117

    Security Fix(es):

    * haproxy: an HTTP method name may contain a space followed by the name of     a protected resource (CVE-2021-39241)
    * haproxy: request smuggling attack or response splitting via duplicate     content-length header (CVE-2021-40346)

    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.

    All OpenShift Container Platform 4.7 users are advised to upgrade to these updated packages and images     when they are available in the appropriate release channel. To check for available updates, use the     OpenShift Console or the CLI oc command. Instructions for upgrading a cluster are available at     https://docs.openshift.com/container-platform/4.7/updating/updating-cluster-between-     minor.html#understanding-upgrade-channels_updating-cluster-between-minor

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.

The remote SUSE Linux SLES15 host has a package installed that is affected by a vulnerability as referenced in the SUSE- SU-2021:3257-1 advisory.

    - CVE-2021-40346: Fixed request smuggling vulnerability in HTX (bsc#1189877).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

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

The remote Redhat Enterprise Linux 7 / 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:4118 advisory.

  - haproxy: does not ensure that the scheme and path portions of a URI have the expected characters     (CVE-2021-39240)

  - haproxy: an HTTP method name may contain a space followed by the name of a protected resource     (CVE-2021-39241)

  - haproxy: it can lead to a situation with an attacker-controlled HTTP Host header because a mismatch     between Host and authority is mishandled (CVE-2021-39242)

  - haproxy: request smuggling attack or response splitting via duplicate content-length header     (CVE-2021-40346)

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

The remote Redhat Enterprise Linux 7 / 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2022:0024 advisory.

    Red Hat OpenShift Container Platform is Red Hat's cloud computing     Kubernetes application platform solution designed for on-premise or private     cloud deployments.

    This advisory contains the RPM packages for Red Hat OpenShift Container Platform 4.6.53. See the following     advisory for the container images for this release:

    https://access.redhat.com/errata/RHBA-2022:0025

    Security Fix(es):

    * haproxy: an HTTP method name may contain a space followed by the name of     a protected resource (CVE-2021-39241)
    * haproxy: request smuggling attack or response splitting via duplicate     content-length header (CVE-2021-40346)

    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.

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.

The version of haproxy2 installed on the remote host is prior to 2.2.17-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2HAPROXY2-2023-005 advisory.

    A flaw was found in haproxy. An input validation flaw when processing HTTP/2 requests causes haproxy to     not ensure that the scheme and path portions of a URI have the expected characters.  This may cause     specially crafted input to bypass implemented security restrictions. The highest threat from this     vulnerability is confidentiality. (CVE-2021-39240)

    haproxy has an input validation flaw that could allow a remote attacker to bypass implemented security     restrictions.  An HTTP method name may contain a space followed by the name of a protected resource. Given     this, It is possible that an server would interpret this as a request for that protected resource. The     highest threat from this vulnerability is possible confidentiality concerns. (CVE-2021-39241)

    An issue was discovered in HAProxy 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. It can lead     to a situation with an attacker-controlled HTTP Host header, because a mismatch between Host and authority     is mishandled. (CVE-2021-39242)

    Proxy server haproxy has a flaw that can could allow an HTTP request smuggling attack with the goal of     bypassing access-control list rules defined by haproxy. The attack was made possible by utilizing an     integer overflow vulnerability that allowed reaching an unexpected state in haproxy while parsing an HTTP     request. The highest threat from this vulnerability is integrity. (CVE-2021-40346)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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

The remote Red Hat Enterprise Linux CoreOS  host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:5208 advisory.

  - haproxy: does not ensure that the scheme and path portions of a URI have the expected characters     (CVE-2021-39240)

  - haproxy: an HTTP method name may contain a space followed by the name of a protected resource     (CVE-2021-39241)

  - haproxy: it can lead to a situation with an attacker-controlled HTTP Host header because a mismatch     between Host and authority is mishandled (CVE-2021-39242)

  - haproxy: request smuggling attack or response splitting via duplicate content-length header     (CVE-2021-40346)

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

ID	名稱	產品	系列	已發布	已更新	嚴重性
153791	SUSE SLES15 Security Update : haproxy (SUSE-SU-2021:3258-1)	Nessus	SuSE Local Security Checks	2021/9/30	2026/6/25	high
158372	EulerOS 2.0 SP10 : haproxy (EulerOS-SA-2022-1224)	Nessus	Huawei Local Security Checks	2022/2/25	2023/11/7	high
153123	Debian DSA-4968-1 : haproxy - security update	Nessus	Debian Local Security Checks	2021/9/8	2025/1/24	high
191145	CentOS 9 : haproxy-2.4.7-1.el9	Nessus	CentOS Local Security Checks	2024/2/29	2024/4/26	high
153118	openSUSE 15 Security Update : haproxy (openSUSE-SU-2021:2975-1)	Nessus	SuSE Local Security Checks	2021/9/8	2023/12/1	high
153691	Photon OS 1.0: Haproxy PHSA-2021-1.0-0435	Nessus	PhotonOS Local Security Checks	2021/9/27	2024/7/23	high
156406	EulerOS 2.0 SP9 : haproxy (EulerOS-SA-2021-2924)	Nessus	Huawei Local Security Checks	2021/12/30	2023/11/21	high
312441	RHCOS 4 : OpenShift Container Platform 4.7.41 (RHSA-2022:0114)	Nessus	Red Hat Local Security Checks	2026/5/6	2026/5/6	high
312555	RHCOS 4 : OpenShift Container Platform 4.6.53 (RHSA-2022:0024)	Nessus	Red Hat Local Security Checks	2026/5/6	2026/5/6	high
156905	RHEL 7 / 8 : OpenShift Container Platform 4.7.41 (RHSA-2022:0114)	Nessus	Red Hat Local Security Checks	2022/1/20	2024/11/7	high
153750	Photon OS 3.0: Haproxy PHSA-2021-3.0-0303	Nessus	PhotonOS Local Security Checks	2021/9/27	2025/8/22	high
153795	SUSE SLES15 Security Update : haproxy (SUSE-SU-2021:3257-1)	Nessus	SuSE Local Security Checks	2021/9/30	2026/6/25	high
155292	RHEL 7 / 8 : OpenShift Container Platform 4.9.6 packages and (RHSA-2021:4118)	Nessus	Red Hat Local Security Checks	2021/11/12	2023/11/23	high
156716	RHEL 7 / 8 : OpenShift Container Platform 4.6.53 (RHSA-2022:0024)	Nessus	Red Hat Local Security Checks	2022/1/13	2024/11/7	high
181935	Amazon Linux 2 : haproxy2 (ALASHAPROXY2-2023-005)	Nessus	Amazon Linux Local Security Checks	2023/9/27	2024/12/11	high
312517	RHCOS : OpenShift Container Platform 4.8.25 (RHSA-2021:5208)	Nessus	Red Hat Local Security Checks	2026/5/6	2026/5/6	high
153725	Photon OS 4.0: Haproxy PHSA-2021-4.0-0104	Nessus	PhotonOS Local Security Checks	2021/9/27	2026/11/2	high

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