CVE-2021-20255 — Infinite Loop in Qemu

CWE-835 — Infinite LoopCWE-674 — Uncontrolled Recursion6 documents6 sources
Severity
5.5MEDIUMNVD
EPSS
0.2%
top 60.21%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
9
QemuDebian QemuDebian Linux+6 more
Timeline
PublishedMar 9
Latest updateMay 24

Description

A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6

Affected Packages8 packages

▶debiandebian/qemu< qemu 1:8.1.0+ds-1 (forky)
▶Debianqemu/qemu< 1:8.1.0+ds-1+1

Also affects: Debian Linux 9.0

Patches

Patch: bugzilla.redhat.com ↗Patch: www.openwall.com ↗Patch: bugzilla.redhat.com ↗

🔴Vulnerability Details

2
GHSA
GHSA-v6w7-gq3g-fwvm: A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU↗2022-05-24
▶
OSV
CVE-2021-20255: A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU↗2021-03-09
▶

📋Vendor Advisories

3
Microsoft
A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. Th↗2021-03-09
▶
Red Hat
QEMU: net: eepro100: stack overflow via infinite recursion↗2021-02-18
▶
Debian
CVE-2021-20255: qemu - A stack overflow via an infinite recursion vulnerability was found in the eepro1...↗2021
▶