Vulnerability identifier: #VU23097

Vulnerability risk: Low

CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-19246

CWE-ID: CWE-125

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 perform a denial of service (DoS) attack.

The vulnerability exists due to heap-based buffer over-read in str_lower_case_match in regexec.c, if used with PPH 7.3. A remote attacker can perform a denial of service attack or gain access to sensitive information.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Oniguruma: 6.9.0 - 6.9.3

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External links
http://bugs.php.net/bug.php?id=78559
http://github.com/kkos/oniguruma/commit/d3e402928b6eb3327f8f7d59a9edfa622fec557b

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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.