#VU37732 Buffer overflow in Debian Linux - CVE-2017-17852

Vulnerability identifier: #VU37732

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-17852

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

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

Vendor: Debian

Description

The vulnerability allows a local authenticated user to execute arbitrary code.

kernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local users to cause a denial of service (memory corruption) or possibly have unspecified other impact by leveraging mishandling of 32-bit ALU ops.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Debian Linux: 9.0

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External links
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=468f6eafa6c44cb2c5d8aad35e12f06c240a812a
https://www.openwall.com/lists/oss-security/2017/12/21/2
https://github.com/torvalds/linux/commit/468f6eafa6c44cb2c5d8aad35e12f06c240a812a

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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.