HIGH
CVE-2018-1100
CWE-120Published: April 11, 2018· Updated: Jun 17, 2026
7.8
CVSS v3.1
Official Description
zsh through version 5.4.2 is vulnerable to a stack-based buffer overflow in the utils.c:checkmailpath function. A local attacker could exploit this to execute arbitrary code in the context of another user.
Technical Analysis
CVE-2018-1100 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Vendors & Products
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
ADVISORYhttps://usn.ubuntu.com/3764-1/
ADVISORYhttps://usn.ubuntu.com/3764-1/
All References (14)
→
https://access.redhat.com/errata/RHSA-2018:1932Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2018:3073Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1563395Issue Tracking · Third Party Advisory
→
https://security.gentoo.org/glsa/201805-10Third Party Advisory
→
https://usn.ubuntu.com/3764-1/Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2018:1932Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2018:3073Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1563395Issue Tracking · Third Party Advisory
→
https://security.gentoo.org/glsa/201805-10Third Party Advisory
→
https://usn.ubuntu.com/3764-1/Third Party Advisory
Quick Facts
CVE IDCVE-2018-1100
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-120
CISA KEVNo
Affected3 vendor(s)
PublishedApr 11, 2018
Related CVEs (CWE-120)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2018-1100 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.