Multiple vulnerabilities in Ruby cgi gem
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2021-41816 CVE-2021-41819 |
| CWE-ID | CWE-119 CWE-451 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
cgi Web applications / Modules and components for CMS |
| Vendor | Ruby |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Buffer overflow
EUVDB-ID: #VU58364
Risk: High
CVSSv3.1:
CVE-ID: CVE-2021-41816
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 in CGI.escape_html. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall updates from vendor's website.
Vulnerable software versionscgi: 0.1.0 - 0.3.0
CPE2.3 External links
http://www.ruby-lang.org/en/news/2021/11/24/buffer-overrun-in-cgi-escape_html-cve-2021-41816/
Q & A
Can this vulnerability be exploited remotely?
Is there known malware, which exploits this vulnerability?
2) Spoofing attack
EUVDB-ID: #VU58365
Risk: Medium
CVSSv3.1:
CVE-ID: CVE-2021-41819
CWE-ID:
CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to incorrect processing of user-supplied data in CGI::Cookie.parse. A remote attacker can spoof page content.
MitigationInstall updates from vendor's website.
Vulnerable software versionscgi: 0.1.0 - 0.3.0
CPE2.3 External links
Q & A
Can this vulnerability be exploited remotely?
Is there known malware, which exploits this vulnerability?
