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.
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
- CWE-787Out-of-bounds WriteBase
- Data version
- 5.1
- Document digest
- 4f140bbe3671feda3b8d767f3edc28764226dd904f512bd6bd1a9994e43a03f5
05 Affected products
06 References
- bugs.debian.orghttps://bugs.debian.org/911640
- www.cabextract.org.ukhttps://www.cabextract.org.uk/#changes
- usn.ubuntu.comUSN-3814-3https://usn.ubuntu.com/3814-3/
- usn.ubuntu.comUSN-3814-1https://usn.ubuntu.com/3814-1/
- usn.ubuntu.comUSN-3814-2https://usn.ubuntu.com/3814-2/
- www.openwall.comhttps://www.openwall.com/lists/oss-security/2018/10/22/1
- lists.debian.org[debian-lts-announce] 20181026 [SECURITY] [DLA 1555-1] libmspack security updatehttps://lists.debian.org/debian-lts-announce/2018/10/msg00017.html
- github.comhttps://github.com/kyz/libmspack/commit/40ef1b4093d77ad3a5cfcee1f5cb6108b3a3bcc2
- security.gentoo.orgGLSA-201903-20https://security.gentoo.org/glsa/201903-20
- access.redhat.comRHSA-2019:2049https://access.redhat.com/errata/RHSA-2019:2049
- www.starwindsoftware.comhttps://www.starwindsoftware.com/security/sw-20181213-0001/
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~esm1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- libmspack Fixed in 0.4-1ubuntu0.1~esm1Available 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.