CVE-2021-35247 on CISA KEV

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 ignor

01What CISA says about this 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…

02Required action — verbatim from CISA

Apply updates per vendor instructions.

03Notes & references

• www.solarwinds.com — https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35247
• documentation.solarwinds.com — https://documentation.solarwinds.com/en/success_center/servu/content/release_not…

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

Vendor	Product	Versions
SolarWinds	Serv	U — 15.2.5 and previous versions

06Detection

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection:

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