Vulnerability Monitor

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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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.5, indicating it can be exploited remotely over the network with relatively low complexity though user interaction is required and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 7 products from cabextract_project, from libmspack_project, from debian and 4 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2018, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2018-10-23T02:29:00.263

Last Modified

2024-11-21T03:56:12.317

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.5 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
CWE-787

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	cabextract_project	cabextract	< 1.8	Yes
Application	libmspack_project	libmspack	0.3	Yes
Application	libmspack_project	libmspack	0.4	Yes
Application	libmspack_project	libmspack	0.5	Yes
Application	libmspack_project	libmspack	0.6	Yes
Application	libmspack_project	libmspack	0.7	Yes
Application	libmspack_project	libmspack	0.7.1	Yes
Operating System	debian	debian_linux	8.0	Yes
Operating System	redhat	enterprise_linux	7.0	Yes
Operating System	canonical	ubuntu_linux	12.04	Yes
Operating System	canonical	ubuntu_linux	14.04	Yes
Operating System	canonical	ubuntu_linux	16.04	Yes
Operating System	canonical	ubuntu_linux	18.04	Yes
Operating System	canonical	ubuntu_linux	18.10	Yes
Operating System	suse	linux_enterprise_server	11	Yes
Operating System	suse	linux_enterprise_server	12	Yes
Operating System	suse	linux_enterprise_server	12	Yes
Operating System	suse	linux_enterprise_server	12	Yes
Application	starwindsoftware	starwind_virtual_san	-	Yes

References

https://access.redhat.com/errata/RHSA-2019:2049 Third Party Advisory ([email protected])
https://bugs.debian.org/911640 Mailing List, Third Party Advisory ([email protected])
https://github.com/kyz/libmspack/commit/40ef1b4093d77ad3a5cfcee1f5cb6108b3a3bcc2 Patch, Third Party Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2018/10/msg00017.html Mailing List, Third Party Advisory ([email protected])
https://security.gentoo.org/glsa/201903-20 Third Party Advisory ([email protected])
https://usn.ubuntu.com/3814-1/ Third Party Advisory ([email protected])
https://usn.ubuntu.com/3814-2/ Third Party Advisory ([email protected])
https://usn.ubuntu.com/3814-3/ Third Party Advisory ([email protected])
https://www.cabextract.org.uk/#changes Product, Vendor Advisory ([email protected])
https://www.openwall.com/lists/oss-security/2018/10/22/1 Mailing List, Third Party Advisory ([email protected])
https://www.starwindsoftware.com/security/sw-20181213-0001/ Third Party Advisory ([email protected])
https://access.redhat.com/errata/RHSA-2019:2049 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugs.debian.org/911640 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/kyz/libmspack/commit/40ef1b4093d77ad3a5cfcee1f5cb6108b3a3bcc2 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2018/10/msg00017.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/201903-20 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://usn.ubuntu.com/3814-1/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://usn.ubuntu.com/3814-2/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://usn.ubuntu.com/3814-3/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.cabextract.org.uk/#changes Product, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.openwall.com/lists/oss-security/2018/10/22/1 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.starwindsoftware.com/security/sw-20181213-0001/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cabextract_project's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.