#VU18322 Incorrect calculation in libseccomp - CVE-2019-9893

Vulnerability identifier: #VU18322

Vulnerability risk: Low

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

CVE-ID: CVE-2019-9893

CWE-ID: CWE-682

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libseccomp
Universal components / Libraries / Libraries used by multiple products

Vendor: The libseccomp Project

Description

The vulnerability allows a local user to bypass certain security restrictions.

The vulnerability exists due to incorrect 64-bit syscall argument comparison when using arithmetic operators, such as LT, GT, LE, or GE. A local user can bypass seccomp filters and gain elevated privileges on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

libseccomp: 0.1.0 - 2.3.3

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External links
https://github.com/seccomp/libseccomp/issues/139
https://seclists.org/oss-sec/2019/q1/179
https://security.gentoo.org/glsa/201904-18

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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.