#VU7238 Security restrictions bypass in Linux kernel - CVE-2017-7895

Vulnerability identifier: #VU7238

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-7895

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description
The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The weakness exists due to boundary error when handling a user-supplied input. A remote attacker can send a specially crafted request, trigger pointer-arithmetic errors or possibly have unspecified other impact related to fs/nfsd/nfs3xdr.c and fs/nfsd/nfsxdr.c.

Successful exploitation of the vulnerability results in access to the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 4.0.1 - 4.0.9, 4.1 - 4.10.13, 4.2.0 - 4.2.8, 4.3 - 4.3.6, 4.4.0 - 4.4.75, 4.5.0 - 4.5.7, 4.6 rc1 - 4.6.7, 4.7.0 - 4.7.10, 4.8.0 - 4.8.17, 4.9 - 4.9.34

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External links
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=13bf9fbff0e5e099e2b6f0...

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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.