SB2022100727 - Fedora 35 update for mod_security, mod_security_crs
Published: October 7, 2022
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 vulnerabilities.
1) Input validation error (CVE-ID: CVE-2022-39955)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to bypass filtration rules.
The vulnerability exists due to insufficient validation of user-supplied input when parsing HTTP Content-Type header field that indicates multiple character encoding schemes. A remote attacker send a specially crafted HTTP request and bypass the configurable CRS Content-Type header "charset" allow list.
2) Input validation error (CVE-ID: CVE-2022-39956)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
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.
3) Input validation error (CVE-ID: CVE-2022-39957)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to bypass filtration rules.
The vulnerability exists due to insufficient validation of HTTP Accept header field containing an optional "charset" parameter. A remote attacker can send a specially crafted HTTP request and bypass WAF detection.
4) Input validation error (CVE-ID: CVE-2022-39958)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to bypass filtration rules.
The vulnerability exists due to insufficient validation of the HTTP Range header field with a small byte range. A remote attacker can exfiltrate small and undetectable sections of data by repeatedly submitting an HTTP Range header field with a small byte range.
Remediation
Install update from vendor's website.