Multiple vulnerabilities in Linux kernel



Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2020-12888
CVE-2020-13143
CWE-ID CWE-125
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper Handling of Exceptional Conditions

EUVDB-ID: #VU28159

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-12888

CWE-ID: N/A

Exploit availability: No

Description

The vulnerability allows a local user to perform a deinal of service (DoS) attack.

The vulnerability exists due to the VFIO PCI driver mishandles attempts to access disabled memory space. A local user can cause a denial of service condition on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 5.6 - 5.6.13

CPE2.3 External links

https://www.openwall.com/lists/oss-security/2020/05/19/6
https://lore.kernel.org/kvm/158871401328.15589.17598154478222071285.stgit@gimli.home/
https://lore.kernel.org/kvm/158871570274.15589.10563806532874116326.stgit@gimli.home/


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Out-of-bounds read

EUVDB-ID: #VU28157

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-13143

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

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition in "gadget_dev_desc_UDC_store" in "drivers/usb/gadget/configfs.c" file. A remote attacker can trigger out-of-bounds read error and cause a denial of service on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 5.6 - 5.6.13

CPE2.3 External links

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=15753588bcd4bbffae1cca33c8ced5722477fe1f
https://www.spinics.net/lists/linux-usb/msg194331.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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