| Name | CVE-2023-40550 |
| Description | An out-of-bounds read flaw was found in Shim when it tried to validate the SBAT information. This issue may expose sensitive data during the system's boot phase. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3813-1 |
| Debian Bugs | 1061519 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| shim (PTS) | bullseye | 15.8-1~deb11u1 | fixed |
| bookworm | 15.8-1~deb12u1 | fixed |
| sid, trixie | 15.8-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| shim | source | buster | 15.8-1~deb10u1 | | DLA-3813-1 | |
| shim | source | bullseye | 15.8-1~deb11u1 | | | |
| shim | source | bookworm | 15.8-1~deb12u1 | | | |
| shim | source | (unstable) | 15.8-1 | | | 1061519 |
Notes
https://bugzilla.redhat.com/show_bug.cgi?id=2259915
https://github.com/rhboot/shim/commit/93ce2552f3e9f71f888a672913bfc0eef255c56d (15.8)
Followup: https://github.com/rhboot/shim/commit/e7f5fdf53ee68025f3ef2688e2f27ccb0082db83 (15.8)