Ubuntu update for modsecurity-apache
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2021-42717 CVE-2022-48279 CVE-2023-24021 |
| CWE-ID | CWE-674 CWE-20 CWE-119 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Ubuntu Operating systems & Components / Operating system libapache2-modsecurity (Ubuntu package) Operating systems & Components / Operating system package or component libapache2-mod-security2 (Ubuntu package) Operating systems & Components / Operating system package or component |
| Vendor | Canonical Ltd. |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Uncontrolled Recursion
EUVDB-ID: #VU59052
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-42717
CWE-ID:
CWE-674 - Uncontrolled Recursion
Exploit availability: No
DescriptionThe 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.
Update the affected package modsecurity-apache to the latest version.
Vulnerable software versionsUbuntu: 14.04 - 22.04
libapache2-modsecurity (Ubuntu package): before Ubuntu Pro
libapache2-mod-security2 (Ubuntu package): before Ubuntu Pro
External linkshttp://ubuntu.com/security/notices/USN-6370-1
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: #VU72085
Risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-48279
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to insufficient validation of user-supplied input when parsing HTTP multipart requests. A remote attacker can send specially crafted input to the application and bypass the Web Application Firewall.
MitigationUpdate the affected package modsecurity-apache to the latest version.
Vulnerable software versionsUbuntu: 14.04 - 22.04
libapache2-modsecurity (Ubuntu package): before Ubuntu Pro
libapache2-mod-security2 (Ubuntu package): before Ubuntu Pro
External linkshttp://ubuntu.com/security/notices/USN-6370-1
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) Buffer overflow
EUVDB-ID: #VU72086
Risk: High
CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-24021
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when executing rules that read the FILES_TMP_CONTENT collection. A remote attacker can upload a specially crafted file on the system, trigger memory corruption and execute arbitrary code on the target system or bypass implemented WAF protection rules.
MitigationUpdate the affected package modsecurity-apache to the latest version.
Vulnerable software versionsUbuntu: 14.04 - 22.04
libapache2-modsecurity (Ubuntu package): before Ubuntu Pro
libapache2-mod-security2 (Ubuntu package): before Ubuntu Pro
External linkshttp://ubuntu.com/security/notices/USN-6370-1
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.
