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CVE-2018-18584

24
FAUCET Score

CVE-2018-18584 is an out-of-bounds write vulnerability affecting libmspack before version 0.8alpha and cabextract before version 1.8, impacting various distributions including Debian, Red Hat, and SUSE. With a CVSS score of 6.5 (Medium), this vulnerability can be exploited remotely with low attack complexity, requiring user interaction, and could lead to a high impact on availability. While the EPSS score indicates a low probability of exploitation, there is currently no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.8CPE matchmatch criteria
cpe:2.3:a:cabextract_project:cabextract:*:*:*:*:*:*:*:*
0.3CPE matchmatch criteria
cpe:2.3:a:libmspack_project:libmspack:0.3:alpha:*:*:*:*:*:*
0.4CPE matchmatch criteria
cpe:2.3:a:libmspack_project:libmspack:0.4:alpha:*:*:*:*:*:*
0.5CPE matchmatch criteria
cpe:2.3:a:libmspack_project:libmspack:0.5:alpha:*:*:*:*:*:*
0.6CPE matchmatch criteria
cpe:2.3:a:libmspack_project:libmspack:0.6:alpha:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.09%
Probability of exploitation in next 30 days
EPSS Percentile
86.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0309 is in the 94th percentile among its peer group of 26,209 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libmspack-0:0.5-0.7.alpha.el7
View patch

Vendor Advisories (1)

redhatCVE-2018-18584Moderate

libmspack: Out-of-bounds write in mspack/cab.h

Oct 17, 2018

References

access.redhat.com / errata/RHSA-2019:2049
Third Party Advisory
bugs.debian.org / 911640
Mailing ListThird Party Advisory
github.com / kyz/libmspack/commit/40ef1b4093d77ad3a5cfcee1f5cb6108b3a3bcc2
PatchThird Party Advisory
lists.debian.org / debian-lts-announce/2018/10/msg00017.html
Mailing ListThird Party Advisory
security.gentoo.org / glsa/201903-20
Third Party Advisory
usn.ubuntu.com / 3814-1
Third Party Advisory
usn.ubuntu.com / 3814-2
Third Party Advisory
usn.ubuntu.com / 3814-3
Third Party Advisory
cabextract.org.uk
ProductVendor Advisory
openwall.com / lists/oss-security/2018/10/22/1
Mailing ListThird Party Advisory
starwindsoftware.com / security/sw-20181213-0001
Third Party Advisory