Fedora 36 update for mod_security, mod_security_crs



Risk Medium
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2022-39955
CVE-2022-39956
CVE-2022-39957
CVE-2022-39958
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Fedora
Operating systems & Components / Operating system

mod_security_crs
Operating systems & Components / Operating system package or component

mod_security
Operating systems & Components / Operating system package or component

Vendor Fedoraproject

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU72087

Risk: Medium

CVSSv4.0: 2.7 [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]

CVE-ID: CVE-2022-39955

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 36

mod_security_crs: before 3.3.4-1.fc36

mod_security: before 2.9.6-1.fc36

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2022-90708b46e3


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.

2) Input validation error

EUVDB-ID: #VU72089

Risk: Medium

CVSSv4.0: 2.7 [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]

CVE-ID: CVE-2022-39956

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 36

mod_security_crs: before 3.3.4-1.fc36

mod_security: before 2.9.6-1.fc36

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2022-90708b46e3


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.

3) Input validation error

EUVDB-ID: #VU72090

Risk: Medium

CVSSv4.0: 2.7 [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]

CVE-ID: CVE-2022-39957

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 36

mod_security_crs: before 3.3.4-1.fc36

mod_security: before 2.9.6-1.fc36

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2022-90708b46e3


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.

4) Input validation error

EUVDB-ID: #VU72091

Risk: Medium

CVSSv4.0: 2.7 [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]

CVE-ID: CVE-2022-39958

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 36

mod_security_crs: before 3.3.4-1.fc36

mod_security: before 2.9.6-1.fc36

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2022-90708b46e3


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.



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