Security readout for executives and security teams
BusyBox before 1.30.0 has a DHCP parsing flaw that can expose sensitive stack memory to a remote attacker. The issue affects udhcp code used by BusyBox DHCP server, client, and relay components. The main business risk is information disclosure from embedded Linux systems and network devices that still ship vulnerable BusyBox builds. Exposure is most likely on Linux appliances, routers, embedded devices, or servers using BusyBox before 1.30.0 with udhcpd, udhcpc, or udhcprelay enabled. The provided CVE data does not enumerate affected CPEs, so product exposure must be confirmed through firmware, package, or vendor advisory review. Treat this as high priority where vulnerable BusyBox is present on network-facing or embedded systems. It is not currently KEV-listed in the provided data, so urgency is strongest for internet-managed appliances, exposed network devices, and environments with weak segmentation rather than as an emergency across all assets. Mitigation focus: Upgrade BusyBox to 1.30.0 or a vendor-patched downstream package.; Apply relevant OS or firmware updates from affected device vendors.; Review Ubuntu USN-3935-1 if using Ubuntu BusyBox packages..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-125: Exact CWE lookup
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Open ATT&CK lookupCVE-2018-20679 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://git.busybox.net/busybox/commit/?id=6d3b4bb24da9a07c263f3c1acf8df85382ff562cCVE reference · x_refsource_MISC
- https://busybox.net/news.htmlCVE reference · x_refsource_MISC
- https://bugs.busybox.net/show_bug.cgi?id=11506CVE reference · x_refsource_MISC
- USN-3935-1CVE reference · vendor-advisory, x_refsource_UBUNTU
- 20190904 SEC Consult SA-20190904-0 :: Multiple vulnerabilities in Cisco router series RV34X, RV26X and RV16XCVE reference · mailing-list, x_refsource_BUGTRAQ
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.