| Name | CVE-2021-20221 |
| Description | An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing an interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said issue while updating controller state fields and their subsequent processing. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario. |
| 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-2560-1, DLA-3099-1, ELA-364-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| qemu (PTS) | jessie, jessie (lts) | 1:2.1+dfsg-12+deb8u23 | fixed |
| stretch (security) | 1:2.8+dfsg-6+deb9u17 | fixed | |
| stretch (lts), stretch | 1:2.8+dfsg-6+deb9u19 | fixed | |
| buster | 1:3.1+dfsg-8+deb10u8 | vulnerable | |
| buster (security) | 1:3.1+dfsg-8+deb10u12 | fixed | |
| bullseye | 1:5.2+dfsg-11+deb11u3 | fixed | |
| bullseye (security) | 1:5.2+dfsg-11+deb11u2 | fixed | |
| bookworm | 1:7.2+dfsg-7+deb12u5 | fixed | |
| trixie | 1:8.2.1+ds-2 | fixed | |
| sid | 1:8.2.2+ds-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| qemu | source | jessie | 1:2.1+dfsg-12+deb8u19 | ELA-364-1 | ||
| qemu | source | stretch | 1:2.8+dfsg-6+deb9u13 | DLA-2560-1 | ||
| qemu | source | buster | 1:3.1+dfsg-8+deb10u9 | DLA-3099-1 | ||
| qemu | source | (unstable) | 1:5.2+dfsg-4 |
https://www.openwall.com/lists/oss-security/2021/02/05/1
https://gitlab.com/qemu-project/qemu/-/commit/edfe2eb4360cde4ed5d95bda7777edcb3510f76a (v6.0.0-rc0)