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virtuozzoVirtuozzoVZA-2018-026
HistoryMay 07, 2018 - 12:00 a.m.

Kernel security update: Virtuozzo ReadyKernel patch 49.1 for Virtuozzo 7.0.4 and 7.0.4 HF3

2018-05-0700:00:00
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44

0.0004 Low

EPSS

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9.8%

The cumulative Virtuozzo ReadyKernel patch was updated with security and stability fixes. The patch applies to Virtuozzo 7.0 kernels 3.10.0-514.16.1.vz7.30.10 (7.0.4) and 3.10.0-514.16.1.vz7.30.15 (7.0.4 HF3).
Vulnerability id: CVE-2017-17448
It was discovered that nfnl_cthelper_list structure was accessible to any user with CAP_NET_ADMIN capability in a network namespace. An unprivileged local user could exploit that to affect netfilter conntrack helpers on the host.

Vulnerability id: CVE-2017-17449
It was discovered that a nlmon link inside a child network namespace was not restricted to that namespace. An unprivileged local user could exploit that to monitor system-wide netlink activity.

Vulnerability id: CVE-2017-17450
It was discovered that xt_osf_fingers data structure was accessible from any network namespace. This allowed unprivileged local users to bypass intended access restrictions and modify the system-wide OS fingerprint list used by specific iptables rules.

Vulnerability id: CVE-2017-17807
The KEYS subsystem omitted an access-control check when writing a key to the default keyring of the current task, allowing a local user to bypass security checks for the keyring. This compromised the validity of the keyring for those who relied on it.

Vulnerability id: PSBM-83692
If โ€˜dccp_ipv6โ€™ module was loaded on the host, a local unprivileged user could trigger a kernel crash in dccp_write_xmit() or inet_csk_get_port() using a specially crafted sequence of system calls.