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

  - An attacker who submits a crafted tar file with size in header struct being 0 may be able to trigger an     calling of malloc(0) for a variable gnu_longlink, causing an out-of-bounds read. (CVE-2021-33643)

  - An attacker who submits a crafted tar file with size in header struct being 0 may be able to trigger an     calling of malloc(0) for a variable gnu_longname, causing an out-of-bounds read. (CVE-2021-33644)

  - The th_read() function doesn't free a variable t->th_buf.gnu_longlink after allocating memory, which may     cause a memory leak. (CVE-2021-33645)

  - The th_read() function doesn't free a variable t->th_buf.gnu_longname after allocating memory, which may     cause a memory leak. (CVE-2021-33646)

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 version of libtar installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2021-33643 advisory.

  - An attacker who submits a crafted tar file with size in header struct being 0 May be able to trigger an     calling of malloc(0) for a variable gnu_longlink, causing an out-of-bounds read. (CVE-2021-33643)

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 libtar package has been released.

The remote Fedora 36 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2022-ccc68b06cc advisory.

    - fix use-after-free bugs introduced by incorrect memleak fixes (CVE-2021-33640)


Tenable has extracted the preceding description block directly from the Fedora 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 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2023:2898 advisory.

    The libtar packages contain a C library for manipulating tar archives. The library supports both the     strict POSIX tar format and many of the commonly used GNU extensions.

    Security Fix(es):

    * libtar: out-of-bounds read in gnu_longlink (CVE-2021-33643)

    * libtar: out-of-bounds read in gnu_longname (CVE-2021-33644)

    * libtar: memory leak found in th_read() function (CVE-2021-33645)

    * libtar: memory leak found in th_read() function (CVE-2021-33646)

    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 8.8 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.

ID	名稱	產品	系列	已發布	已更新	嚴重性
175163	EulerOS Virtualization 3.0.2.0 : libtar (EulerOS-SA-2023-1753)	Nessus	Huawei Local Security Checks	2023/5/6	2023/5/6	critical
201645	CBL Mariner 2.0 Security Update: libtar (CVE-2021-33643)	Nessus	MarinerOS Local Security Checks	2024/7/3	2024/7/3	critical
332324	Photon OS 5.0: Libtar PHSA-2023-5.0-91-0010	Nessus	PhotonOS Local Security Checks	2026/8/5	2026/11/2	critical
203367	Photon OS 4.0: Libtar PHSA-2022-4.0-0231	Nessus	PhotonOS Local Security Checks	2024/7/23	2026/11/2	critical
169344	Fedora 36 : libtar (2022-ccc68b06cc)	Nessus	Fedora Local Security Checks	2022/12/28	2024/11/14	critical
175902	RHEL 8 : libtar (RHSA-2023:2898)	Nessus	Red Hat Local Security Checks	2023/5/17	2024/11/7	critical

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