Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-42550 |
CWE-ID | CWE-94 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
Logback Server applications / Other server solutions |
Vendor | QOS.ch |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU59053
Risk: Medium
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-42550
CWE-ID:
CWE-94 - Improper Control of Generation of Code ('Code Injection')
Exploit availability: No
DescriptionThe vulnerability allows a remote user to execute arbitrary code on the target system.
The vulnerability exists due to improper input validation. A remote user can send a specially crafted request to the application and execute arbitrary code on the target system by tricking the application to load a malicious configuration from a remote LDAP server.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsLogback: 1.2.0 - 1.3.0 alpha10
External linkshttp://github.com/cn-panda/logbackRceDemo
http://jira.qos.ch/browse/LOGBACK-1591
http://logback.qos.ch/news.html
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.