| Name | CVE-2022-28737 |
| Description | There's a possible overflow in handle_image() when shim tries to load and execute crafted EFI executables; The handle_image() function takes into account the SizeOfRawData field from each section to be loaded. An attacker can leverage this to perform out-of-bound writes into memory. Arbitrary code execution is not discarded in such scenario. |
| 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 |
|---|
| shim (PTS) | buster | 15.4-7~deb10u1 | vulnerable |
| buster (security) | 15.7-1~deb10u1 | fixed |
| bullseye | 15.7-1~deb11u1 | fixed |
| sid, trixie, bookworm | 15.7-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| shim | source | bullseye | 15.6-1~deb11u1 | | | |
| shim | source | (unstable) | 15.6-1 | | | |
Notes
[buster] - shim <no-dsa> (Fix via point update)
https://www.openwall.com/lists/oss-security/2022/06/07/5
https://github.com/rhboot/shim/commit/e99bdbb827a50cde019393d3ca1e89397db221a7 (15.6)
https://github.com/rhboot/shim/commit/159151b6649008793d6204a34d7b9c41221fb4b0 (15.6)