8.6 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
9.3 High
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
0.004 Low
EPSS
Percentile
74.6%
The cumulative Virtuozzo ReadyKernel patch was updated with a security fix. The patch applies to all supported Virtuozzo kernels and that of Virtuozzo Infrastructure Platform 2.5.
Vulnerability id: PSBM-91042
It was discovered that a malicious user logged in to a Virtuozzo container could potentially overwrite the ‘vzctl’ binary on the host. The attacker could replace executables in that container with symlinks to ‘/proc/self/exe’. After that, ‘vzctl exec’ called from the host to run one of such executables would try to run the host’s ‘vzctl’ there instead. If the attacker managed to intercept that, they would be able to change the contents of the host’s ‘vzctl’ binary. The issue is similar to CVE-2019-5736, but affects ‘vzctl’ rather than ‘runc’.
readykernel.com/patch/Virtuozzo-7/readykernel-patch-37.30-72.0-1.vl7/
readykernel.com/patch/Virtuozzo-7/readykernel-patch-40.4-72.0-1.vl7/
readykernel.com/patch/Virtuozzo-7/readykernel-patch-43.10-72.0-1.vl7/
readykernel.com/patch/Virtuozzo-7/readykernel-patch-46.7-72.0-1.vl7/
readykernel.com/patch/Virtuozzo-7/readykernel-patch-48.2-72.0-1.vl7/
readykernel.com/patch/Virtuozzo-7/readykernel-patch-63.3-72.0-1.vl7/
readykernel.com/patch/Virtuozzo-7/readykernel-patch-64.7-72.0-1.vl7/
readykernel.com/patch/Virtuozzo-7/readykernel-patch-73.24-72.0-1.vl7/
8.6 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
9.3 High
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
0.004 Low
EPSS
Percentile
74.6%