#VU22933 Buffer Over-read in Oniguruma - CVE-2019-19204

Vulnerability identifier: #VU22933

Vulnerability risk: Medium

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

CVE-ID: CVE-2019-19204

CWE-ID: CWE-126

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
Oniguruma

Software vendor:
K.Kosako

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists in the "fetch_interval_quantifier" function (formerly known as fetch_range_quantifier) in "regparse.c" file due to the PFETCH is called without checking PEND. A remote attacker can cause a denial of service condition on the target system.

Install updates from vendor's website.

• https://github.com/kkos/oniguruma/issues/162
• https://github.com/kkos/oniguruma/releases/tag/v6.9.4_rc2