Buffer overflow in Denx U-Boot
CVE-2022-33967
squashfs filesystem implementation of U-Boot versions from v2020.10-rc2 to v2022.07-rc5 contains a heap-based buffer overflow vulnerability due to a defect in the metadata reading process. Loading a specially crafted squashfs image may lead to a denial-of-service (DoS) condition or arbitrary code execution.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (44.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000
Affected products
- Denx U-Boot — versions 2020.10, 2021.01, 2021.04
- Denx Software Engineering U-Boot — versions versions from v2020.10-rc2 to v2022.07-rc5
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.denx.de/project/u-boot/ (Product)
- lists.denx.de/pipermail/u-boot/2022-June/487467.html (Exploit, Mailing List, Vendor Advisory)
- source.denx.de/u-boot/u-boot/-/commit/7f7fb9937c6cb49dd35153bd6708872b390b0a44 (Patch, Third Party Advisory, Vendor Advisory)
- jvn.jp/en/vu/JVNVU97846460/index.html (Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2022-33967?
- CVE-2022-33967 is a high-severity vulnerability in Denx U-Boot, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-07-20.
- How severe is CVE-2022-33967?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2022-33967 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.