Integer signedness error in the base64_decode function in the HTTP authentication functionality (http_auth.c) in lighttpd 1.4 before 1.4.30 and 1.5 before SVN revision 2806 allows remote attackers to cause a denial of service (segmentation fault) via crafted base64 input that triggers an out-of-bounds read with a negative index.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Lighttpd | Lighttpd | 1.4.1 (including) | 1.4.30 (excluding) |
| Lighttpd | Lighttpd | 1.5.0 (including) | 1.5.0 (including) |