Due to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume significant system resources. If parsing user input, this may be used as a denial of service vector.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Due to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume     significant system resources. If parsing user input, this may be used as a denial of service vector.
    (CVE-2021-4235)

Note that Nessus relies on the presence of the package as reported by the vendor.

The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2023:0103 advisory.

    Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:

      CVE-2021-4235:
      A flaw was found in go-yaml. This issue occurs due to unbounded alias chasing, where a maliciously     crafted YAML file can cause the system to consume significant system resources. If parsing user input,     this may be used as a denial of service vector.
      CVE-2022-1705:
      A flaw was found in golang. The HTTP/1 client accepted invalid Transfer-Encoding headers indicating     chunked encoding. This issue could allow request smuggling, but only if combined with an intermediate     server that also improperly accepts the header as invalid.
      CVE-2022-2879:
      A flaw was found in the golang package, where Reader.Read does not set a limit on the maximum size of     file headers. After fixing, Reader.Read limits the maximum size of header blocks to 1 MiB. This flaw     allows a maliciously crafted archive to cause Read to allocate unbounded amounts of memory, potentially     causing resource exhaustion or panic.
      CVE-2022-2880:
      A flaw was found in the golang package, where requests forwarded by reverse proxy include the raw query     parameters from the inbound request, including unparseable parameters rejected by net/http. This issue     could permit query parameter smuggling when a Go proxy forwards a parameter with an unparseable value.
    After the fix, the reverse proxy sanitizes the query parameters in the forwarded query when the outbound     request's form field is set after the reverse proxy. The director function returns, indicating that the     proxy has parsed the query parameters. Proxies that do not parse query parameters continue to forward the     original query parameters unchanged.
      CVE-2022-2995:
      Incorrect handling of the supplementary groups in the CRI-O container engine might lead to sensitive     information disclosure or possible data modification if an attacker has direct access to the affected     container where supplementary groups are used to set access permissions and is able to execute a binary     code in that container.
      CVE-2022-3162:
      A flaw was found in kubernetes. Users authorized to list or watch one type of namespaced custom resource     cluster-wide can read custom resources of a different kind in the same API group they are not authorized     to read.
      CVE-2022-3172:
      A security issue was discovered in kube-apiserver that allows an aggregated API server to redirect     client traffic to any URL. This issue leads to the client performing unexpected actions and forwarding the     client's API server credentials to third parties.
      CVE-2022-3259:
      Openshift 4.9 does not use HTTP Strict Transport Security (HSTS) which may allow man-in-the-middle     (MITM) attacks.
      CVE-2022-3466:
      The version of cri-o as released for Red Hat OpenShift Container Platform 4.9.48, 4.10.31, and 4.11.6     via RHBA-2022:6316, RHBA-2022:6257, and RHBA-2022:6658, respectively, included an incorrect version of     cri-o missing the fix for CVE-2022-27652, which was previously fixed in OCP 4.9.41 and 4.10.12 via     RHBA-2022:5433 and RHSA-2022:1600. This issue could allow an attacker with access to programs with     inheritable file capabilities to elevate those capabilities to the permitted set when execve(2) runs. For     more details, see https://access.redhat.com/security/cve/CVE-2022-27652.
      CVE-2022-27664:
      A flaw was found in the golang package. In net/http in Go, attackers can cause a denial of service     because an HTTP/2 connection can hang during closing if a fatal error preempts the shutdown.
      CVE-2022-30631:
      A flaw was found in golang. Calling the Reader, Read method on an archive that contains a large number     of concatenated 0-length compressed files can cause a panic issue due to stack exhaustion.
      CVE-2022-32148:
      A flaw was found in net/http/httputil golang package. When httputil.ReverseProxy.ServeHTTP is called     with a Request.Header map containing a nil value for the X-Forwarded-For header, ReverseProxy could set     the client IP incorrectly. This issue may affect confidentiality.
      CVE-2022-32189:
      An uncontrolled resource consumption flaw was found in Golang math/big. A too-short encoded message can     cause a panic in Float.GobDecode and Rat.GobDecode in math/big in Go, potentially allowing an attacker to     create a denial of service, impacting availability.
      CVE-2022-32190:
      A flaw was found in the golang package. The JoinPath doesn't remove the ../ path components appended to     a domain that is not terminated by a slash, possibly leading to a directory traversal attack.
      CVE-2022-41715:
      A flaw was found in the golang package, where programs that compile regular expressions from untrusted     sources are vulnerable to memory exhaustion or a denial of service. The parsed regexp representation is     linear in the input size. Still, in some cases, the constant factor can be as high as 40,000, making a     relatively small regexp consume larger amounts of memory. After the fix, each regexp being parsed is     limited to a 256 MB memory footprint. Regular expressions whose representation would use more space than     that are rejected. Routine use of regular expressions is unaffected.

Tenable has extracted the preceding description block directly from the Tencent 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 Redhat Enterprise Linux 8 / 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2022:7398 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 4.12.0. See the following     advisory for the container images for this release:

    https://access.redhat.com/errata/RHSA-2022:7399

    Security Fix(es):

    * go-yaml: Denial of Service in go-yaml (CVE-2021-4235)
    * golang: net/http/httputil: ReverseProxy should not forward unparseable query parameters (CVE-2022-2880)
    * kubernetes: Unauthorized read of Custom Resources (CVE-2022-3162)
    * kube-apiserver: Aggregated API server can cause clients to be redirected (SSRF) (CVE-2022-3172)
    * golang: net/http: handle server errors after sending GOAWAY (CVE-2022-27664)
    * golang: compress/gzip: stack exhaustion in Reader.Read (CVE-2022-30631)
    * golang: net/http/httputil: NewSingleHostReverseProxy - omit X-Forwarded-For not working (CVE-2022-32148)
    * golang: regexp/syntax: limit memory used by parsing regexps (CVE-2022-41715)
    * cri-o: incorrect handling of the supplementary groups (CVE-2022-2995)
    * OpenShift: Missing HTTP Strict Transport Security (CVE-2022-3259)
    * cri-o: Security regression of CVE-2022-27652 (CVE-2022-3466)
    * golang: math/big: decoding big.Float and big.Rat types can panic if the encoded message is too short,     potentially allowing a denial of service (CVE-2022-32189)

    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 4.12 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/4.12/updating/updating-cluster-cli.html

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 Red Hat Enterprise Linux CoreOS 4 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2022:7398 advisory.

  - Due to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume     significant system resources. If parsing user input, this may be used as a denial of service vector.
    (CVE-2021-4235)

  - Acceptance of some invalid Transfer-Encoding headers in the HTTP/1 client in net/http before Go 1.17.12     and Go 1.18.4 allows HTTP request smuggling if combined with an intermediate server that also improperly     fails to reject the header as invalid. (CVE-2022-1705)

  - In net/http in Go before 1.18.6 and 1.19.x before 1.19.1, attackers can cause a denial of service because     an HTTP/2 connection can hang during closing if shutdown were preempted by a fatal error. (CVE-2022-27664)

  - Reader.Read does not set a limit on the maximum size of file headers. A maliciously crafted archive could     cause Read to allocate unbounded amounts of memory, potentially causing resource exhaustion or panics.
    After fix, Reader.Read limits the maximum size of header blocks to 1 MiB. (CVE-2022-2879)

  - Requests forwarded by ReverseProxy include the raw query parameters from the inbound request, including     unparsable parameters rejected by net/http. This could permit query parameter smuggling when a Go proxy     forwards a parameter with an unparsable value. After fix, ReverseProxy sanitizes the query parameters in     the forwarded query when the outbound request's Form field is set after the ReverseProxy. Director     function returns, indicating that the proxy has parsed the query parameters. Proxies which do not parse     query parameters continue to forward the original query parameters unchanged. (CVE-2022-2880)

  - Incorrect handling of the supplementary groups in the CRI-O container engine might lead to sensitive     information disclosure or possible data modification if an attacker has direct access to the affected     container where supplementary groups are used to set access permissions and is able to execute a binary     code in that container. (CVE-2022-2995)

  - python-scciclient: missing server certificate verification (CVE-2022-2996)

  - Uncontrolled recursion in Reader.Read in compress/gzip before Go 1.17.12 and Go 1.18.4 allows an attacker     to cause a panic due to stack exhaustion via an archive containing a large number of concatenated 0-length     compressed files. (CVE-2022-30631)

  - Users authorized to list or watch one type of namespaced custom resource cluster-wide can read custom     resources of a different type in the same API group without authorization. Clusters are impacted by this     vulnerability if all of the following are true: 1. There are 2+ CustomResourceDefinitions sharing the same     API group 2. Users have cluster-wide list or watch authorization on one of those custom resources. 3. The     same users are not authorized to read another custom resource in the same API group. (CVE-2022-3162)

  - A security issue was discovered in kube-apiserver that allows an aggregated API server to redirect client     traffic to any URL. This could lead to the client performing unexpected actions as well as forwarding the     client's API server credentials to third parties. (CVE-2022-3172)

  - Improper exposure of client IP addresses in net/http before Go 1.17.12 and Go 1.18.4 can be triggered by     calling httputil.ReverseProxy.ServeHTTP with a Request.Header map containing a nil value for the     X-Forwarded-For header, which causes ReverseProxy to set the client IP as the value of the X-Forwarded-For     header. (CVE-2022-32148)

  - A too-short encoded message can cause a panic in Float.GobDecode and Rat GobDecode in math/big in Go     before 1.17.13 and 1.18.5, potentially allowing a denial of service. (CVE-2022-32189)

  - JoinPath and URL.JoinPath do not remove ../ path elements appended to a relative path. For example,     JoinPath(https://go.dev, ../go) returns the URL https://go.dev/../go, despite the JoinPath     documentation stating that ../ path elements are removed from the result. (CVE-2022-32190)

  - Openshift 4.9 does not use HTTP Strict Transport Security (HSTS) which may allow man-in-the-middle (MITM)     attacks. (CVE-2022-3259)

  - The version of cri-o as released for Red Hat OpenShift Container Platform 4.9.48, 4.10.31, and 4.11.6 via     RHBA-2022:6316, RHBA-2022:6257, and RHBA-2022:6658, respectively, included an incorrect version of cri-o     missing the fix for CVE-2022-27652, which was previously fixed in OCP 4.9.41 and 4.10.12 via     RHBA-2022:5433 and RHSA-2022:1600. This issue could allow an attacker with access to programs with     inheritable file capabilities to elevate those capabilities to the permitted set when execve(2) runs. For     more details, see https://access.redhat.com/security/cve/CVE-2022-27652. (CVE-2022-3466)

  - Programs which compile regular expressions from untrusted sources may be vulnerable to memory exhaustion     or denial of service. The parsed regexp representation is linear in the size of the input, but in some     cases the constant factor can be as high as 40,000, making relatively small regexps consume much larger     amounts of memory. After fix, each regexp being parsed is limited to a 256 MB memory footprint. Regular     expressions whose representation would use more space than that are rejected. Normal use of regular     expressions is unaffected. (CVE-2022-41715)

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

The remote Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6287-1 advisory.

    Simon Ferquel discovered that the Go yaml package incorrectly handled certain YAML documents. If a user or     an automated system were tricked into opening a specially crafted input file, a remote attacker could     possibly use this issue to cause the system to crash, resulting in a denial of service. (CVE-2021-4235)

    It was discovered that the Go yaml package incorrectly handled certain large YAML documents. If a user or     an automated system were tricked into opening a specially crafted input file, a remote attacker could     possibly use this issue to cause the system to crash, resulting in a denial of service. (CVE-2022-3064)

Tenable has extracted the preceding description block directly from the Ubuntu 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 Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3479 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-3479-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                  Roberto C. Snchez     July 05, 2023                                 https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : golang-yaml.v2     Version        : 2.2.2-1+deb10u1     CVE ID         : CVE-2021-4235 CVE-2022-3064

    Two denial of service vulnerabilities have been discovered in     golang-yaml.v2, a library which provides YAML support for the Go     language.

    CVE-2021-4235

        Due to unbounded alias chasing, a maliciously crafted YAML file can         cause the system to consume significant system resources. If parsing         user input, this may be used as a denial of service vector.

    CVE-2022-3064

        Parsing malicious or large YAML documents can consume excessive         amounts of CPU or memory.

    Thanks to Scarlett Moore for working on preparing this update.

    For Debian 10 buster, these problems have been fixed in version     2.2.2-1+deb10u1.

    We recommend that you upgrade your golang-yaml.v2 packages.

    For the detailed security status of golang-yaml.v2 please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/golang-yaml.v2

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS     Attachment:
    signature.asc     Description: PGP signature

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

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

ID	Name	Product	Family	Severity
243822	Linux Distros Unpatched Vulnerability : CVE-2021-4235	Nessus	Misc.	medium
239281	TencentOS Server 3: ostree (TSSA-2023:0103)	Nessus	Tencent Local Security Checks	high
194196	RHEL 8 / 9 : OpenShift Container Platform 4.12.0 (RHSA-2022:7398)	Nessus	Red Hat Local Security Checks	high
189448	RHCOS 4 : OpenShift Container Platform 4.12.0 (RHSA-2022:7398)	Nessus	Red Hat Local Security Checks	high
179734	Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS : Go yaml vulnerabilities (USN-6287-1)	Nessus	Ubuntu Local Security Checks	high
178004	Debian dla-3479 : golang-gopkg-yaml.v2-dev - security update	Nessus	Debian Local Security Checks	high

Detections

Analytics

CVE-2021-4235

medium

Tenable Plugins

medium

high

high

high

high

high