Virtuozzo 7 : readykernel-patch (VZA-2018-072)
high Nessus Plugin ID 121097
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Synopsis
The remote Virtuozzo host is missing a security update.Description
According to the version of the vzkernel package and the readykernel-patch installed, the Virtuozzo installation on the remote host is affected by the following vulnerabilities :- An integer overflow flaw was found in create_elf_tables(). An unprivileged local user with access to SUID (or otherwise privileged) binary could use this flaw to escalate their privileges on the system.
- The Linux kernel imposes a size limit on the memory needed to store the arguments and environment variables of a process, 1/4 of the maximum stack size (RLIMIT_STACK). However, the pointers to these data were not taken into account, which allowed attackers to bypass the limit and even exhaust the stack of the process.
Note that Tenable Network Security has extracted the preceding description block directly from the Virtuozzo security advisory.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
Solution
Update the readykernel patch.See Also
https://virtuozzosupport.force.com/s/article/VZA-2018-072
http://www.nessus.org/u?25adf1ad
http://www.nessus.org/u?f0832297
http://www.nessus.org/u?b724d89f
http://www.nessus.org/u?60fdd754
http://www.nessus.org/u?7388d379
http://www.nessus.org/u?a2c86afd
http://www.nessus.org/u?6402c427
http://www.nessus.org/u?b39b7926
Plugin Details
Severity: High
ID: 121097
File Name: Virtuozzo_VZA-2018-072.nasl
Version: 1.3
Type: local
Family: Virtuozzo Local Security Checks
Published: 1/11/2019
Updated: 1/4/2021
Dependencies: ssh_get_info.nasl
Risk Information
VPR
Risk Factor: High
Score: 8.4
CVSS v2
Risk Factor: High
Base Score: 7.2
Temporal Score: 5.6
Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C
Temporal Vector: E:POC/RL:OF/RC:C
CVSS v3
Risk Factor: High
Base Score: 7.8
Temporal Score: 7
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: E:P/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:virtuozzo:virtuozzo:readykernel, cpe:/o:virtuozzo:virtuozzo:7
Required KB Items: Host/local_checks_enabled, Host/Virtuozzo/release, Host/Virtuozzo/rpm-list, Host/readykernel-info
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 9/28/2018