Description
openssl_encrypt versions before 1.4.9 fail to properly validate key derivation function costs in crafted files, allowing attackers to trigger unbounded memory and CPU exhaustion during pre-authentication processing. Attackers can supply malicious files with excessive KDF parameters to exhaust system resources and crash or wedge the process before password verification occurs.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| jahlives | openssl_encrypt | < 1.4.9 | 1.4.9 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | openssl-encrypt | < 1.4.9 | 1.4.9 | PYSEC-2026-3961 |
References
- GitHub Security Advisory (GHSA-phmr-p567-q5g6) vendor-advisory
- VulnCheck Advisory: openssl_encrypt before 1.4.9 Denial of Service via unbounded KDF cost third-party-advisory