This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2021-36647 →

DEBIAN-CVE-2021-36647

Use of a Broken or Risky Cryptographic Algorithm in the function mbedtls_mpi_exp_mod() in lignum.c in Mbed TLS Mbed TLS all versions before 3.0.0, 2.2...

Original description

The description as published by the source.

Use of a Broken or Risky Cryptographic Algorithm in the function mbedtls_mpi_exp_mod() in lignum.c in Mbed TLS Mbed TLS all versions before 3.0.0, 2.27.0 or 2.16.11 allows attackers with access to precise enough timing and memory access information (typically an untrusted operating system attacking a secure enclave such as SGX or the TrustZone secure world) to recover the private keys used in RSA.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 mbedtls

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.16.11-0.1"}]}]

Debian:13 mbedtls

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.16.11-0.1"}]}]

Debian:14 mbedtls

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.16.11-0.1"}]}]

References

advisory security-tracker.debian.org