iproute2 before 5.1.0 has a use-after-free in get_netnsid_from_name in ip/ipnetns.c. NOTE: security relevance may be limited to certain uses of setuid that, although not a default, are sometimes a configuration option offered to end users. Even when setuid is used, other factors (such as C library configuration) may block exploitability.

iproute2 before 5.1.0 has a use-after-free in get_netnsid_from_name in ip/ipnetns.c. NOTE: security relevance may be limited to certain uses of setuid that, although not a default, are sometimes a configuration option offered to end users. Even when setuid is used, other factors (such as C library configuration) may block exploitability.

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Please visit https://www.tenable.com/products/tenable-ot for more information.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - iproute2 before 5.1.0 has a use-after-free in get_netnsid_from_name in ip/ipnetns.c. NOTE: security
    relevance may be limited to certain uses of setuid that, although not a default, are sometimes a
    configuration option offered to end users. Even when setuid is used, other factors (such as C library
    configuration) may block exploitability. (CVE-2019-20795)

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

  - iproute2 before 5.1.0 has a use-after-free in get_netnsid_from_name in ip/ipnetns.c. NOTE: security     relevance may be limited to certain uses of setuid that, although not a default, are sometimes a     configuration option offered to end users. Even when setuid is used, other factors (such as C library     configuration) may block exploitability. (CVE-2019-20795)

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

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

  - iproute2 before 5.1.0 has a use-after-free in get_netnsid_from_name in ip/ipnetns.c. NOTE: security     relevance may be limited to certain uses of setuid that, although not a default, are sometimes a     configuration option offered to end users. Even when setuid is used, other factors (such as C library     configuration) may block exploitability. (CVE-2019-20795)

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.

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

  - iproute2 before 5.1.0 has a use-after-free in get_netnsid_from_name in ip/ipnetns.c. NOTE: security     relevance may be limited to certain uses of setuid that, although not a default, are sometimes a     configuration option offered to end users. Even when setuid is used, other factors (such as C library     configuration) may block exploitability. (CVE-2019-20795)

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 SUSE Linux SLED12 / SLES12 / SLES_SAP12 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2021:3452-1 advisory.

    - CVE-2019-20795: Fixed a use-after-free vulnerability in get_netnsid_from_name. (bsc#1171452)

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 host is affected by the vulnerability described in GLSA-202008-06 (iproute2: Denial of service)

    iproute2 was found to contain a use-after-free in get_netnsid_from_name       in ip/ipnetns.c.
  Impact :

    A remote attacker, able to feed iproute2 crafted data, may be able to       cause a Denial of Service condition.
  Workaround :

    There is no known workaround at this time.

An update of the iproute2 package has been released.

The remote Ubuntu 18.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-4357-1 advisory.

    It was discovered that IPRoute incorrectly handled certain inputs. An attacker could possibly use this     issue to execute arbitrary code.

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

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

ID	Name	Product	Family	Severity
504236	Siemens SIMATIC S7-1500 Use After Free (CVE-2019-20795)	Tenable OT Security	Tenable.ot	medium
423986	Alpine: multiple iproute2 packages: security update to 5.1.0-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	medium
423986	Alpine: multiple iproute2 packages: security update to 5.1.0-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	medium
222857	Linux Distros Unpatched Vulnerability : CVE-2019-20795	Nessus	Misc.	medium
405002	Alpine: iproute2: security update to 4.20.0-r2	Tenable Cloud Security	Alpine Linux Local Security Checks	medium
405002	Alpine: iproute2: security update to 4.20.0-r2	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	medium
405001	Alpine: iproute2: security update to 4.19.0-r1	Tenable Cloud Security	Alpine Linux Local Security Checks	medium
405001	Alpine: iproute2: security update to 4.19.0-r1	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	medium
165913	EulerOS Virtualization 3.0.6.6 : iproute (EulerOS-SA-2022-2507)	Nessus	Huawei Local Security Checks	medium
159086	EulerOS 2.0 SP5 : iproute (EulerOS-SA-2022-1327)	Nessus	Huawei Local Security Checks	medium
154217	SUSE SLED12 / SLES12 Security Update : iproute2 (SUSE-SU-2021:3452-1)	Nessus	SuSE Local Security Checks	medium
139441	GLSA-202008-06 : iproute2: Denial of service	Nessus	Gentoo Local Security Checks	medium
136698	Photon OS 3.0: Iproute2 PHSA-2020-3.0-0091	Nessus	PhotonOS Local Security Checks	medium
136606	Ubuntu 18.04 LTS : IPRoute vulnerability (USN-4357-1)	Nessus	Ubuntu Local Security Checks	medium

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CVE-2019-20795

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