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TI-2026-39414 Aliases CVE-2026-54579

mport mirror-selection ping accepts insufficiently validated ICMP replies

Priority LOW 11CWE-125Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-345.

Summary

mport is the MidnightBSD Package Manager. Prior to 2.7.8, ping() in libmport/ping.c accepted ICMP replies without validating icmp_id or icmp_seq and parsed the reply using a fixed IP-header offset instead of ip_hl. A network attacker able to inject or spoof visible ICMP replies could influence mirror latency selection, while a malformed packet carrying IP options could shift the ICMP header and trigger an out-of-bounds read. This issue is fixed in version 2.7.8.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00159 5th percentileScored 2026-11-07
Fix Fixed mport (MidnightBSD): 2.7.8

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MidnightBSDmportbefore 2.7.82.7.8Patch availableCNA
  • mport VendorMidnightBSD Affected before 2.7.8 Fixed in 2.7.8 Patch available CNA

Remediation

  • Fix · CNA mport (MidnightBSD) Fixed in 2.7.8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-54579

References

Other 1

  • TI-2008-04392 The TCP implementation in (1) Linux, (2) platforms based on BSD Unix, (3) Microsoft… CVSS 2.0HIGH 7.1
  • TI-2009-00656 The pf_test_rule function in OpenBSD Packet Filter (PF), as used in OpenBSD 4.2 through… CVSS 2.0HIGH 7.8
  • TI-2026-39418 mport package bundle downloads allow unsafe destination filenames CVSS 4.0HIGH 8.3
  • TI-2026-39415 mport index decompression can leave partial or corrupt index data after zstd failures CVSS 4.0HIGH 8.3
  • TI-2026-39416 mport bootstrap index fetch can continue after hash verification failure CVSS 4.0HIGH 8.3
  • TI-2026-39421 mport permits repository and package mirror fetches over insecure transport CVSS 4.0MEDIUM 6.0
See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences