| 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) |
| Debian Bugs | 1061519 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| shim (PTS) | buster | 15.4-7~deb10u1 | vulnerable |
| buster (security) | 15.7-1~deb10u1 | vulnerable |
| bullseye | 15.7-1~deb11u1 | vulnerable |
| trixie, bookworm, sid | 15.7-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| shim | source | (unstable) | (unfixed) | | | 1061519 |
Notes
[bookworm] - shim <no-dsa> (Minor issue, fix with a point release)
[bullseye] - shim <no-dsa> (Minor issue, fix with a point release)
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)