#VU24804 Improper Output Neutralization for Logs in SimpleSAMLphp - CVE-2020-5225
Vulnerability identifier: #VU24804
Vulnerability risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2020-5225
CWE-ID:
CWE-117
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
SimpleSAMLphp
Web applications /
Other software
Vendor: SimpleSAMLphp
Description
The vulnerability allows a remote attacker to inject new log lines with arbitrary content.
The vulnerability exists due to the "www/erroreport.php" script, which receives error reports and sends them via email to the system administrator, does not properly sanitize the report identifier obtained from the request. A remote attacker can manually craft this report ID and inject logs messages into a SimpleSAMLphp log file, trying to trick or confuse system administrators.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
SimpleSAMLphp: 1.18.0 - 1.18.3
External links
https://github.com/simplesamlphp/simplesamlphp/security/advisories/GHSA-6gc6-m364-85ww
https://simplesamlphp.org/security/202001-02
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.
