Vulnerability · Published May 28, 2021 · Assigned by redhat
CVE-2020-35504
Medium 6.0
In plain English
A medium-severity null pointer dereference in QEMU. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.0Medium
Exploit odds (30 days)0.3%top 72.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
A NULL pointer dereference flaw was found in the SCSI emulation support of QEMU in versions before 6.0.0. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | qemu | 6.0.0-r2 | ALPINE-CVE-2020-35504 |
| Alpine:v3.21 | qemu | 6.0.0-r2 | ALPINE-CVE-2020-35504 |
| Alpine:v3.22 | qemu | 6.0.0-r2 | ALPINE-CVE-2020-35504 |
| Alpine:v3.23 | qemu | 6.0.0-r2 | ALPINE-CVE-2020-35504 |
| Alpine:v3.24 | qemu | 6.0.0-r2 | ALPINE-CVE-2020-35504 |
| Debian:12 | qemu | 1:6.0+dfsg-3 | DEBIAN-CVE-2020-35504 |
| Debian:13 | qemu | 1:6.0+dfsg-3 | DEBIAN-CVE-2020-35504 |
| Debian:14 | qemu | 1:6.0+dfsg-3 | DEBIAN-CVE-2020-35504 |
Affected products (as reported)
Weakness: CWE-476
References
- [oss-security] 20210416 QEMU: ESP security fixes mailing-list, x_refsource_MLIST
- https://bugzilla.redhat.com/show_bug.cgi?id=1909766 x_refsource_MISC
- https://www.openwall.com/lists/oss-security/2021/04/16/3 x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20210713-0006/ x_refsource_CONFIRM
- GLSA-202208-27 vendor-advisory, x_refsource_GENTOO
- [debian-lts-announce] 20220905 [SECURITY] [DLA 3099-1] qemu security update mailing-list, x_refsource_MLIST