Description
An issue was discovered in Mbed TLS 3.6 before 3.6.1. A stack buffer overflow in mbedtls_ecdsa_der_to_raw() and mbedtls_ecdsa_raw_to_der() can occur when the bits parameter is larger than the largest supported curve. In some configurations with PSA disabled, all values of bits are affected. (This never happens in internal library calls, but can affect applications that call these functions directly.)
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | mbedtls +1 | 3.6.1-r0 | — |
| Alpine v3.23 | mbedtls | 3.6.1-r0 | — |
| Alpine v3.22 | mbedtls | 3.6.1-r0 | — |
| Alpine v3.21 | mbedtls | 3.6.1-r0 | — |
| Alpine v3.20 | mbedtls | 3.6.1-r0 | — |