SB2025053064 - openEuler 20.03 LTS SP4 update for mod_security

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Input validation error (CVE-ID: CVE-2022-39956)

The vulnerability allows a remote attacker to bypass filtration rules.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can send a payload that uses a character encoding scheme via the Content-Type or the deprecated Content-Transfer-Encoding multipart MIME header fields that will not be decoded and inspected by the web application firewall engine and the rule set.

2) Resource exhaustion (CVE-ID: CVE-2025-47947)

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

The vulnerability exists due to application does not properly control consumption of internal resources when handling application/json payloads. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Successful exploitation of the vulnerability requires that at least one rule which does a sanitiseMatchedBytes action.

Remediation

Install update from vendor's website.

References

• https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2025-1559