synced 14 MIN AGO
01 Record

CVE-2018-18584

In mspack/cab.h in libmspack before 0.8alpha and cabextract before 1.8, the CAB block input buffer is one byte too small for the maximal Quantum block, leading to an out-of-bounds write.

UnratedPUBLISHEDCNA: mitre
CNA base scoreUnratedNo CNA CVSS vector

02 Description

In mspack/cab.h in libmspack before 0.8alpha and cabextract before 1.8, the CAB block input buffer is one byte too small for the maximal Quantum block, leading to an out-of-bounds write.

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
2.66% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 85.5% of scored records. A rank, not a probability.
NVD base score
6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2018-10-23 00:00Z8 YR AGO
Last updated
2024-08-05 11:15Z2 YR AGO
Reserved
2018-10-22
Assigning CNA
mitre
Record state
PUBLISHED
Severity
Not rated by the issuing CNA
CNA CVSS vector
Not published by the issuing CNA
Weaknesses
Data version
5.1
Document digest
4f140bbe3671feda3b8d767f3edc28764226dd904f512bd6bd1a9994e43a03f5

05 Affected products

VendorProductVersionsPlatforms
cabextract_projectcabextractNot specified—
canonicalubuntu_linuxNot specified—
debiandebian_linuxNot specified—
libmspack_projectlibmspackNot specified—
redhatenterprise_linuxNot specified—
starwindsoftwarestarwind_virtual_sanNot specified—
suselinux_enterprise_serverNot specified—

06 References

07 Fixed in

Debian 12

  • cabextract
    Fixed in 1.4-5
  • libmspack
    Fixed in 0.8-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • cabextract
    Fixed in 1.4-5
  • libmspack
    Fixed in 0.8-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • cabextract
    Fixed in 1.4-5
  • libmspack
    Fixed in 0.8-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 14.04 LTS

  • clamav
    Fixed in 0.100.2+dfsg-1ubuntu0.14.04.2

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 16.04 LTS

  • libmspack
    Fixed in 0.5-1ubuntu0.16.04.3

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 18.04 LTS

  • libmspack
    Fixed in 0.6-3ubuntu0.2

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 14.04 LTS

  • cabextract
    Fixed in 1.4-4ubuntu0.1~esm1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • libmspack
    Fixed in 0.4-1ubuntu0.1~esm1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.