Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-28965 |
CWE-ID | CWE-611 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software |
Ubuntu Operating systems & Components / Operating system ruby2.7 (Ubuntu package) Operating systems & Components / Operating system package or component libruby2.7 (Ubuntu package) Operating systems & Components / Operating system package or component ruby2.5 (Ubuntu package) Operating systems & Components / Operating system package or component libruby2.5 (Ubuntu package) Operating systems & Components / Operating system package or component ruby2.3 (Ubuntu package) Operating systems & Components / Operating system package or component libruby2.3 (Ubuntu package) Operating systems & Components / Operating system package or component |
Vendor | Canonical Ltd. |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU52000
Risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2021-28965
CWE-ID:
CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to insufficient validation of user-supplied XML input. A remote attacker can pass a specially crafted XML code to the affected application and view contents of arbitrary files on the system or initiate requests to external systems.
Successful exploitation of the vulnerability may allow an attacker to view contents of arbitrary file on the server or perform network scanning of internal and external infrastructure.
MitigationUpdate the affected package ruby2.3 to the latest version.
Vulnerable software versionsUbuntu: 16.04 - 20.10
ruby2.7 (Ubuntu package): before 2.7.0-5ubuntu1.4
libruby2.7 (Ubuntu package): before 2.7.0-5ubuntu1.4
ruby2.5 (Ubuntu package): before 2.5.1-1ubuntu1.9
libruby2.5 (Ubuntu package): before 2.5.1-1ubuntu1.9
ruby2.3 (Ubuntu package): before 2.3.1-2~ubuntu16.04.16
libruby2.3 (Ubuntu package): before 2.3.1-2~ubuntu16.04.16
CPE2.3https://ubuntu.com/security/notices/USN-4922-1
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.