CVE-2021-42374
MEDIUM
5.3
CVSS Score
Published: November 15, 2021 at 12:00 AM UTC
Updated: June 17, 2026 at 04:09 AM UTC
19 products affected across 3 vendorsFedoraCloud BackupH700S Firmware
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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.6%
SSVC
PoC
Description
An out-of-bounds heap read in Busybox's unlzma applet leads to information leak and denial of service when crafted LZMA-compressed input is decompressed. This can be triggered by any applet/format that
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 1.34.01.27.0 ≤ v ≤ 1.33.1
Affected range stops below 1.34.0, so it looks safe — our inference, not a vendor statement
Cloud Backup· NetAppdrupal
95%All versions
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (6)
ExploitThird Party Advisory
Source: [email protected]
https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/Third Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20211223-0002/Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.debian.org/debian-lts-announce/2025/01/msg00012.htmlSSVC — Action Prioritization
SSVCPoCNot automatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
5.3MEDIUMCISA-ADP
- Attack Vector
- LOCAL
- Complexity
- HIGH
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- LOW
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-125
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