Buffer overflow in Denx U-Boot
CVE-2022-30767
nfs_lookup_reply in net/nfs.c in Das U-Boot through 2022.04 (and through 2022.07-rc2) has an unbounded memcpy with a failed length check, leading to a buffer overflow. NOTE: this issue exists because of an incorrect fix for CVE-2019-14196.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.027 (85.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.027 · newest: 0.027 · change: +0.000
Affected products
- Denx U-Boot — versions 2022.07
- Fedoraproject Fedora — versions 36
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/u-boot/u-boot/commit/5d14ee4e53a81055d34ba280cb8fd90330f22a96 (Patch, Third Party Advisory)
- lists.denx.de/pipermail/u-boot/2022-May/483952.html (Mailing List, Third Party Advisory)
- securitylab.github.com/research/uboot-rce-nfs-vulnerability/ (Exploit, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- source.denx.de/u-boot/u-boot/-/commit/bdbf7a05e26f3c5fd437c99e2755ffde186ddc80 (Patch, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2022-30767?
- CVE-2022-30767 is a critical-severity vulnerability in Denx U-Boot, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2022-05-16.
- How severe is CVE-2022-30767?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2022-30767 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.