Debian update for modsecurity-apache



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-42717
CWE-ID CWE-674
Exploitation vector Network
Public exploit N/A
Vulnerable software
 modsecurity-apache (Debian package)
Operating systems & Components / Operating system package or component

Vendor Debian

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Uncontrolled Recursion

EUVDB-ID: #VU59052

Risk: Medium

CVSSv4.0: 6.6 [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:U/U:Green]

CVE-ID: CVE-2021-42717

CWE-ID: CWE-674 - Uncontrolled Recursion

Exploit availability: No

Description

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

The vulnerability exists due to uncontrolled recursion when processing excessively nested JSON objects. A remote attacker can send a specially crafted HTTP request and consume all available worker processes and CPU resources.

Mitigation

Update modsecurity-apache package to one of the following versions: 2.9.3-1+deb10u1, 2.9.3-3+deb11u1.

Vulnerable software versions

modsecurity-apache (Debian package): 2.9.0-1 - 2.9.3-2

CPE2.3 External links

https://www.debian.org/security/2021/dsa-5023


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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