Zetetic SQLCipher 4.x before 4.4.1 has a use-after-free, related to sqlcipher_codec_pragma and sqlite3Strlen30 in sqlite3.c. A remote denial of service attack can be performed. For example, a SQL injection can be used to execute the crafted SQL command sequence. After that, some unexpected RAM data is read.
Weakness
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Sqlcipher | Zetetic | 4.0 (including) | 4.4.1 (excluding) |
| Sqlcipher | Ubuntu | bionic | * |
| Sqlcipher | Ubuntu | focal | * |
| Sqlcipher | Ubuntu | groovy | * |
| Sqlcipher | Ubuntu | hirsute | * |
| Sqlcipher | Ubuntu | impish | * |
| Sqlcipher | Ubuntu | kinetic | * |
| Sqlcipher | Ubuntu | lunar | * |
| Sqlcipher | Ubuntu | mantic | * |
| Sqlcipher | Ubuntu | trusty | * |
| Sqlcipher | Ubuntu | upstream | * |
| Sqlcipher | Ubuntu | xenial | * |
Potential Mitigations
References
- https://github.com/sqlcipher/sqlcipher/compare/v4.4.0...v4.4.1
- https://www.telekom.com/en/corporate-responsibility/data-protection-data-security/security/details/advisories-504842
- https://www.telekom.com/resource/blob/612796/9f221708832a465f03585a45d7f59b45/dl-201112-denial-of-serviceen-data.pdf
- https://github.com/sqlcipher/sqlcipher/compare/v4.4.0...v4.4.1
- https://www.telekom.com/en/corporate-responsibility/data-protection-data-security/security/details/advisories-504842
- https://www.telekom.com/resource/blob/612796/9f221708832a465f03585a45d7f59b45/dl-201112-denial-of-serviceen-data.pdf