Citrix License Server update for Apache HTTP Server
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2023-43622 CVE-2023-45802 CVE-2023-31122 |
| CWE-ID | CWE-399 CWE-125 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Citrix License Server Server applications / Application servers |
| Vendor | Citrix |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Resource management error
EUVDB-ID: #VU82247
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-2023-43622
CWE-ID:
CWE-399 - Resource Management Errors
Exploit availability: No
DescriptionThe 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.
MitigationInstall update from vendor's website.
Vulnerable software versionsCitrix License Server: before 11.17.2.0 45000
External linkshttp://support.citrix.com/article/CTX583758
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: #VU82245
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-2023-45802
CWE-ID:
CWE-399 - Resource Management Errors
Exploit availability: No
DescriptionThe 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.
MitigationInstall update from vendor's website.
Vulnerable software versionsCitrix License Server: before 11.17.2.0 45000
External linkshttp://support.citrix.com/article/CTX583758
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) Out-of-bounds read
EUVDB-ID: #VU82248
Risk: Medium
CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-31122
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe 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.
Install update from vendor's website.
Vulnerable software versionsCitrix License Server: before 11.17.2.0 45000
External linkshttp://support.citrix.com/article/CTX583758
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.
