Vulnerability in Denx (CVE-2022-2347)
Summary
Vulnerability in Denx (CVE-2022-2347). Successful exploitation can lead to full system takeover. Exploitable via wLength.
Original description
The description as published by the source.
There exists an unchecked length field in UBoot. The U-Boot DFU implementation does not bound the length field in USB DFU download setup packets, and it does not verify that the transfer direction corresponds to the specified command. Consequently, if a physical attacker crafts a USB DFU download setup packet with a wLength greater than 4096 bytes, they can write beyond the heap-allocated request buffer.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2022-2347 has been found in Denx.
Attackers can target a specific entry point like wLength over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: 7.7/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Denx CVE-2022-2347" on the vendor's site.
CVE-2022-2347 (Denx) — CWE-122 / CVSS v3 7.7
Attack vector: local / unauthenticated
Attack surface: wLength
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-122) exists in Denx. Attackers reach the vulnerable code path via wLength without authentication.
Check the vendor advisory for the affected versions of Denx. Attack surface: wLength.
Severity: High (CVSS 7.7/10). Successful exploitation can lead to full system takeover.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'Denx' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'Denx' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
Denxを grep し、稼働しているサービス・バージョンを把握する。 -
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2022-2347 u-boot Fixed in: 2021.01+dfsg-5+deb11u1
- Ubuntu UBUNTU-CVE-2022-2347 u-boot
References
- advisory nvd.nist.gov
- advisory github.com
- web seclists.org
- web lists.debian.org
- web cert-portal.siemens.com
- web github.com