How severe is CVE-2018-18585?

CVE-2018-18585 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2018-18585 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18585?

CVE-2018-18585 primarily affects Kyzer Libmspack. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-18585?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-18585 published?

CVE-2018-18585 was published on 2018-10-23 and last updated on 2026-06-17.

CVE-2018-18585

CVE-2018-18585 is a medium-severity vulnerability in Kyzer Libmspack with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.3
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Kyzer Libmspack
Published: 2018-10-23
Last modified: 2026-06-17

Description

chmd_read_headers in mspack/chmd.c in libmspack before 0.8alpha accepts a filename that has '\0' as its first or second character (such as the "/\0" name).

Frequently asked questions

What is CVE-2018-18585?: chmd_read_headers in mspack/chmd.c in libmspack before 0.8alpha accepts a filename that has '\0' as its first or second character (such as the "/\0" name).
How severe is CVE-2018-18585?: CVE-2018-18585 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2018-18585 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18585?: CVE-2018-18585 primarily affects Kyzer Libmspack. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-18585?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-18585 published?: CVE-2018-18585 was published on 2018-10-23 and last updated on 2026-06-17.

References

Affected products (19)

cpe:2.3:a:kyzer:libmspack:0.3:alpha:*:*:*:*:*:*
cpe:2.3:a:kyzer:libmspack:0.4:alpha:*:*:*:*:*:*
cpe:2.3:a:kyzer:libmspack:0.5:alpha:*:*:*:*:*:*
cpe:2.3:a:kyzer:libmspack:0.6:alpha:*:*:*:*:*:*
cpe:2.3:a:kyzer:libmspack:0.7:alpha:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
cpe:2.3:o:suse:linux_enterprise_server:11:sp3:*:*:ltss:*:*:*
cpe:2.3:o:suse:linux_enterprise_server:12:ga:*:*:ltss:*:*:*
cpe:2.3:o:suse:linux_enterprise_server:12:sp1:*:*:ltss:*:*:*
cpe:2.3:o:suse:linux_enterprise_server:12:sp2:*:*:ltss:*:*:*
cpe:2.3:a:starwindsoftware:starwind_virtual_san:-:*:*:*:*:vsphere:*:*

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