Security readout for executives and security teams
Plain-English summary
CVE-2017-15874 is a BusyBox 1.27.2 flaw in LZMA decompression. A local, low-privileged user could trigger an integer underflow that causes invalid read behavior when a crafted archive is processed. Business urgency is moderate because exploitation requires local access and user interaction, and the supplied sources do not show active exploitation.
Executive priority
Treat this as a moderate-priority remediation item for embedded and appliance-heavy environments. It is not supported as actively exploited by the supplied sources, but BusyBox is widely embedded and version visibility is often poor. Focus on inventory and vendor-supported updates.
Technical view
The issue is CWE-191 in archival/libarchive/decompress_unlzma.c. The CVSS 3.1 vector is AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N with score 5.0. Public affected metadata is incomplete, but the title identifies BusyBox 1.27.2. Sources do not name a fix or vendor mitigation.
Likely exposure
Exposure is most likely in Linux systems, embedded firmware, appliances, or containers that include BusyBox 1.27.2 and process LZMA archives through BusyBox. The source bundle does not provide CPEs or a complete affected-version range.
Exploitation context
The CVSS vector indicates local access, low attack complexity, low privileges, and required user interaction. The provided sources do not report active exploitation, and KEV status is false. Avoid assuming remote exposure unless local deployment workflows make BusyBox process untrusted archives.
Researcher notes
Evidence is sparse. The bundle identifies BusyBox 1.27.2 and CWE-191, but affected CPEs, exploit maturity, and fix details are not provided. The CVSS confidentiality impact is high, while integrity and availability are none; validate this against vendor details before escalating risk.
Mitigation direction
- Inventory BusyBox versions across hosts, firmware, containers, and appliance SBOMs.
- Check BusyBox or device-vendor guidance for fixed builds or backported patches.
- Update affected BusyBox packages or firmware when vendor-approved fixes are available.
- Limit processing of untrusted LZMA archives on systems using affected BusyBox builds.
- Prioritize vendor-maintained firmware over manual BusyBox replacement on appliances.
Validation and detection
- Confirm whether BusyBox 1.27.2 is present in target images or firmware.
- Verify whether BusyBox unlzma code is reachable in operational workflows.
- Review vendor advisories for affected-version ranges and fixed release details.
- Check vulnerability management results against actual embedded BusyBox versions.
- Document systems where affected metadata is uncertain or vendor guidance is absent.
Public sources used
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-191: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2017-15874 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
- Medium
- CVSS
- 5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/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:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N1.33.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://bugs.busybox.net/show_bug.cgi?id=10436CVE reference · x_refsource_MISC
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.
Integer Underflow (Wrap or Wraparound)
Integer Underflow (Wrap or Wraparound) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.