Denial of service in Linux kernel



Published: 2020-05-05 | Updated: 2020-05-21
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-12655
CWE-ID CWE-400
Exploitation vector Local
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 one low risk vulnerability.

1) Resource exhaustion

EUVDB-ID: #VU28165

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2020-12655

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources in "xfs_agf_verify" in "fs/xfs/libxfs/xfs_alloc.c" file. A local user can use an XFS v5 image with crafted metadata, trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 5.6 - 5.6.10


CPE2.3 External links

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d0c7feaf87678371c2c09b3709400be416b2dc62
http://github.com/torvalds/linux/commit/d0c7feaf87678371c2c09b3709400be416b2dc62
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ES5C6ZCMALBEBMKNNCTBSLLSYGFZG3FF/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IO5XIQSRI747P4RVVTNX7TUPEOCF4OPU/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IZ2X3TM6RGRUS3KZAS26IJO5XGU7TBBR/
http://lore.kernel.org/linux-xfs/20200221153803.GP9506@magnolia/

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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