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CVE-2018-18585

19
FAUCET Score

CVE-2018-18585 is a vulnerability in libmspack versions prior to 0.8alpha, specifically within the chmd_read_headers function, which improperly handles filenames containing null characters. This flaw affects various distributions including Canonical, Debian, Red Hat, and SUSE. With a CVSS score of 4.3 (Medium), it can be exploited remotely with low attack complexity, requiring user interaction, and could lead to a denial of service. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
0.3CPE matchmatch criteria
cpe:2.3:a:kyzer:libmspack:0.3:alpha:*:*:*:*:*:*
0.4CPE matchmatch criteria
cpe:2.3:a:kyzer:libmspack:0.4:alpha:*:*:*:*:*:*
0.5CPE matchmatch criteria
cpe:2.3:a:kyzer:libmspack:0.5:alpha:*:*:*:*:*:*
0.6CPE matchmatch criteria
cpe:2.3:a:kyzer:libmspack:0.6:alpha:*:*:*:*:*:*
0.7CPE matchmatch criteria
cpe:2.3:a:kyzer:libmspack:0.7:alpha:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.06%
Probability of exploitation in next 30 days
EPSS Percentile
86.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0306 is in the 94th percentile among its peer group of 26,219 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 (1)

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-2018-18585Low

libmspack: chmd_read_headers() fails to reject filenames containing NULL bytes

Oct 17, 2018

References

access.redhat.com / errata/RHSA-2019:2049
Third Party Advisory
bugs.debian.org / 911637
Issue TrackingMailing ListThird Party Advisory
github.com / kyz/libmspack/commit/8759da8db6ec9e866cb8eb143313f397f925bb4f
ExploitThird 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
openwall.com / lists/oss-security/2018/10/22/1
Mailing ListPatchThird Party Advisory
starwindsoftware.com / security/sw-20181213-0002
Third Party Advisory