| Name | CVE-2022-46392 |
| Description | An issue was discovered in Mbed TLS before 2.28.2 and 3.x before 3.3.0. An adversary with access to precise enough information about memory accesses (typically, an untrusted operating system attacking a secure enclave) can recover an RSA private key after observing the victim performing a single private-key operation, if the window size (MBEDTLS_MPI_WINDOW_SIZE) used for the exponentiation is 3 or smaller. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| mbedtls (PTS) | buster | 2.16.0-1 | vulnerable |
| buster (security) | 2.16.9-0~deb10u1 | vulnerable |
| bullseye | 2.16.9-0.1 | vulnerable |
| bookworm | 2.28.3-1 | fixed |
| trixie | 2.28.7-1 | fixed |
| sid | 2.28.8-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| mbedtls | source | (unstable) | 2.28.2-1 | | | |
Notes
[bullseye] - mbedtls <no-dsa> (Minor issue)
[buster] - mbedtls <postponed> (Minor issue)
https://github.com/Mbed-TLS/mbedtls/releases/tag/v2.28.2
Issue is most likely related to library/bignum.c and the mbedtls_mpi_exp_mod function.