The version of glibc installed on the remote host is prior to 2.26-57. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2023-2371 advisory.

    2023-12-14: CVE-2021-33574 was added to this advisory.

    The mq_notify function in the GNU C Library (aka glibc) has a use-after-free. It may use the notification     thread attributes object (passed through its struct sigevent parameter) after it has been freed by the     caller, leading to a denial of service (application crash) or possibly unspecified other impact.
    (CVE-2021-33574)

    In librt in the GNU C Library (aka glibc) through 2.34, sysdeps/unix/sysv/linux/mq_notify.c mishandles     certain NOTIFY_REMOVED data, leading to a NULL pointer dereference. NOTE: this vulnerability was     introduced as a side effect of the CVE-2021-33574 fix. (CVE-2021-38604)

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.

Detections

Analytics

Amazon Linux 2 : glibc (ALAS-2023-2371)

critical Nessus Plugin ID 186573

Version 1.3

Version 1.2

Version 1.1

Version 1.0

Version 1.3 Dec 19, 2023, 8:16 PM Exploit attributes ("Exploitability ease" changed from "No known exploits are available" to "Exploits are available") Plugin Feed: 202312192016
Version 1.2 Dec 19, 2023, 12:08 AM CVSSv2 score source (changed from "CVE-2021-38604" to "CVE-2021-33574") CVSSv2 severity (based on CVE-2021-33574, severity increased from "Medium" to "High") Exploit attributes ("Exploitability ease" changed from "Exploits are available" to "No known exploits are available") Plugin metadata CVE (set "CVE" coverage to "CVE-2021-33574,CVE-2021-38604") CVSS metrics ("CVSSv2 score" set to 7.5. "CVSSv3 score" set to 9.8. "CVSSv2 vector" set to "CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P". "CVSSv3 vector" set to "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H") Plugin Feed: 202312190008
Version 1.1 Dec 5, 2023, 2:37 PM Exploit attributes ("Exploitability ease" changed from "No known exploits are available" to "Exploits are available") Plugin Feed: 202312051437
Version 1.0 Dec 5, 2023, 6:24 AM New Plugin Feed: 202312050624