Multiple vulnerabilities in Linux kernel



Published: 2020-02-25 | Updated: 2020-03-08
Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2020-9383
CVE-2020-2732
CWE-ID CWE-125
CWE-200
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU25813

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2020-9383

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition within the set_fdc() function in drivers/block/floppy.c file in Linux kernel due to the FDC index is not checked for errors before assigning it. A local user can use a specially crafted application to trigger out-of-bounds read error and read contents of memory on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 5.5 - 5.5.6


CPE2.3 External links

http://github.com/torvalds/linux/commit/2e90ca68b0d2f5548804f22f0dd61145516171e3

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Information disclosure

EUVDB-ID: #VU25814

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2020-2732

CWE-ID: CWE-200 - Information Exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to incomplete implementation of vmx_check_intercept on Intel processors in KVM in Linux kernel, which leads to  I/O or MSR interception bitmaps are not checked. A remote attacker with access to guest operating system (e.g. L2 guest) can trick the L0 hypervisor into accessing sensitive information on the L1 hypervisor.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 5.0 - 5.5.13


CPE2.3 External links

http://security.archlinux.org/advisory/ASA-202003-6
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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