Vulnerability record · CVE-2023-41104 · published 23 August 2023
CVE-2023-41104: Varnish-software varnish enterprise memory buffer overflow vulnerability
Varnish Software · Varnish Enterprise
libvmod-digest before 1.0.3, as used in Varnish Enterprise 6.0.x before 6.0.11r5, has an out-of-bounds memory access during base64 decoding, leading to both authentication bypass and information disclosure; however, the exact attack surface will depend on the particular VCL (Varnish Configuration Language) configuration in use.
Description
libvmod-digest before 1.0.3, as used in Varnish Enterprise 6.0.x before 6.0.11r5, has an out-of-bounds memory access during base64 decoding, leading to both authentication bypass and information disclosure; however, the exact attack surface will depend on the particular VCL (Varnish Configuration Language) configuration in use.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Affected products
2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.
References
| Link | Tags |
|---|---|
| https://docs.varnish-software.com/security/VSV00012/ | MitigationVendor Advisory |
| https://github.com/varnish/libvmod-digest/releases/tag/libvmod-digest-1.0.3 | Release Notes |
| https://www.varnish-cache.org/security/VSV00012.html | PatchVendor Advisory |
| https://docs.varnish-software.com/security/VSV00012/ | MitigationVendor Advisory |
| https://github.com/varnish/libvmod-digest/releases/tag/libvmod-digest-1.0.3 | Release Notes |
| https://www.varnish-cache.org/security/VSV00012.html | PatchVendor Advisory |
Track CVE-2023-41104 inside VULONE
Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.
Related vulnerabilities
Same products first, then exploited flaws of the same weakness class.
Source: NIST National Vulnerability Database (record CVE-2023-41104), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.
