#VU22814 Integer overflow in Oniguruma - CVE-2019-19012

Vulnerability identifier: #VU22814

Vulnerability risk: High

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2019-19012

CWE-ID: CWE-190

Exploitation vector: Network

Exploit availability: No

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

Vendor: K.Kosako

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to integer overflow in the "search_in_range" function in "regexec.c". A remote attacker can use a specially crafted regular expression, trigger out-of-bounds read and cause a denial-of-service or information disclosure on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Oniguruma: 6.0.0 - 6.9.4 rc1

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External links
https://github.com/kkos/oniguruma/issues/164
https://github.com/kkos/oniguruma/releases/tag/v6.9.4_rc2

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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. However, proof of concept for this vulnerability is available.