CVE-2021-35247: SolarWinds Serv-U Improper Input Validation Vulnerability
Serv-U web login screen to LDAP authentication was allowing characters that were not sufficiently sanitized. SolarWinds has updated the input mechanism to perform additional validation and sanitization. Please Note: No downstream affect has been detected as the LDAP servers ignored improper characters. To insure proper input validation is completed in all environments. SolarWinds recommends scheduling an update to the latest version of Serv-U.
Other sources
SolarWinds Serv-U versions 15.2.5 and earlier contain an improper input validation vulnerability that allows attackers to build and send queries without sanitization.
— CISA
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
SolarWinds Serv-Uto a version that resolves this vulnerability.Fixed in 15.2.5 - Compensating control
Schedule an update to the latest version of SolarWinds Serv-U so input validation and sanitization are applied in all environments.
Event History
Frequently Asked Questions
What is CVE-2021-35247?
CVE-2021-35247 is a vulnerability in SolarWinds Serv-U that allows unauthorized characters in LDAP authentication, leading to improper input validation.
What is the severity of CVE-2021-35247?
The severity of CVE-2021-35247 is medium with a CVSS score of 5.3.
How does CVE-2021-35247 affect SolarWinds Serv-U?
CVE-2021-35247 affects SolarWinds Serv-U by allowing characters that were not sufficiently sanitized in the web login screen to LDAP authentication.
Has SolarWinds released a fix for CVE-2021-35247?
Yes, SolarWinds has updated the input mechanism in Serv-U to perform additional validation and sanitization to address CVE-2021-35247.
Are there any downstream effects of CVE-2021-35247?
No downstream effects have been detected as the LDAP servers ignored the improper characters.