The remote Ubuntu 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6343-1 advisory.

  - A hash collision flaw was found in the IPv6 connection lookup table in the Linux kernel's IPv6     functionality when a user makes a new kind of SYN flood attack. A user located in the local network or     with a high bandwidth connection can increase the CPU usage of the server that accepts IPV6 connections up     to 95%. (CVE-2023-1206)

  - The fix for XSA-423 added logic to Linux'es netback driver to deal with a frontend splitting a packet in a     way such that not all of the headers would come in one piece. Unfortunately the logic introduced there     didn't account for the extreme case of the entire packet being split into as many pieces as permitted by     the protocol, yet still being smaller than the area that's specially dealt with to keep all (possible)     headers together. Such an unusual packet would therefore trigger a buffer overrun in the driver.
    (CVE-2023-34319)

  - An issue was discovered in l2cap_sock_release in net/bluetooth/l2cap_sock.c in the Linux kernel before     6.4.10. There is a use-after-free because the children of an sk are mishandled. (CVE-2023-40283)

  - A flaw was found in KVM AMD Secure Encrypted Virtualization (SEV) in the Linux kernel. A KVM guest using     SEV-ES or SEV-SNP with multiple vCPUs can trigger a double fetch race condition vulnerability and invoke     the `VMGEXIT` handler recursively. If an attacker manages to call the handler multiple times, they can     trigger a stack overflow and cause a denial of service or potentially guest-to-host escape in kernel     configurations without stack guard pages (`CONFIG_VMAP_STACK`). (CVE-2023-4155)

  - A flaw was found in the Linux kernel's TUN/TAP functionality. This issue could allow a local user to     bypass network filters and gain unauthorized access to some resources. The original patches fixing     CVE-2023-1076 are incorrect or incomplete. The problem is that the following upstream commits -     a096ccca6e50 (tun: tun_chr_open(): correctly initialize socket uid), - 66b2c338adce (tap: tap_open():
    correctly initialize socket uid), pass inode->i_uid to sock_init_data_uid() as the last parameter and     that turns out to not be accurate. (CVE-2023-4194)

  - A flaw was found in the exFAT driver of the Linux kernel. The vulnerability exists in the implementation     of the file name reconstruction function, which is responsible for reading file name entries from a     directory index and merging file name parts belonging to one file into a single long file name. Since the     file name characters are copied into a stack variable, a local privileged attacker could use this flaw to     overflow the kernel stack. (CVE-2023-4273)

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

Detections

Analytics

Ubuntu 22.04 LTS : Linux kernel (OEM) vulnerabilities (USN-6343-1)

high Nessus Plugin ID 180545

Version 1.4

Version 1.3

Version 1.3

Version 1.2

Version 1.1

Version 1.0

Version 1.4 Jan 10, 2024, 8:45 AM Detection (updated detection logic) Plugin metadata Plugin Feed: 202401100845
Version 1.3 Nov 15, 2023, 2:17 PM CVSSv2 score source (changed from "CVE-2023-4128" to "CVE-2023-40283") Plugin Feed: 202311151417
Version 1.3 Jan 9, 2024, 6:56 PM Detection (updated detection logic) Plugin metadata Plugin Feed: 202401091856
Version 1.2 Sep 25, 2023, 2:20 PM CVSS metrics ("CVSSv2 score" changed from 5.6 to 6.8. "CVSSv2 vector" changed from "CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:C" to "CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C") Plugin Feed: 202309251420
Version 1.1 Sep 13, 2023, 4:22 PM CVSS metrics ("CVSSv2 score" changed from 6.8 to 5.6. "CVSSv2 vector" changed from "CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C" to "CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:C") Plugin Feed: 202309131622
Version 1.0 Sep 6, 2023, 5:59 PM New Plugin Feed: 202309061759