Ubuntu update for apache2



| Updated: 2024-05-31
Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2023-31122
CVE-2023-43622
CVE-2023-45802
CWE-ID CWE-125
CWE-399
Exploitation vector Network
Public exploit Public exploit code for vulnerability #2 is available.
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

apache2 (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU82248

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-31122

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

The vulnerability exists due to a boundary condition within mod_macro module. A remote attacker can send specially crafted requests to the server, trigger an out-of-bounds read error and perform a denial of service (DoS) attack.

Mitigation

Update the affected package apache2 to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 23.10

apache2 (Ubuntu package): before 2.4.41-4ubuntu3.15

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6506-1


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) Resource management error

EUVDB-ID: #VU82247

Risk: Medium

CVSSv4.0: 7.7 [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:P/U:Green]

CVE-ID: CVE-2023-43622

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: Yes

Description

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

The vulnerability exists due to improper management of internal resources within the server when processing HTTP/2 connections with window size of 0. A remote attacker can exhaust available workers on the server and perform a denial of service (DoS) attack.

Mitigation

Update the affected package apache2 to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 23.10

apache2 (Ubuntu package): before 2.4.41-4ubuntu3.15

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6506-1


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. However, proof of concept for this vulnerability is available.

3) Resource management error

EUVDB-ID: #VU82245

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-2023-45802

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists due to improper management of internal resources within the server when handling HTTP/2 requests. A remote attacker can send multiple requests to the server and perform a denial of service (DoS) attack.

Mitigation

Update the affected package apache2 to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 23.10

apache2 (Ubuntu package): before 2.4.41-4ubuntu3.15

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6506-1


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.



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