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CVE-2018-1071

16
FAUCET Score

CVE-2018-1071 describes a stack-based buffer overflow vulnerability in zsh versions up to 5.4.2, specifically within the hashcmd() function in exec.c, affecting distributions like Canonical, Debian, and Red Hat. This vulnerability has a CVSS score of 5.5 (Medium), indicating a local attacker could exploit it with low complexity to cause a denial of service. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.4.2CPE matchmatch criteria
cpe:2.3:a:zsh:zsh:*:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
17.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.43%
Probability of exploitation in next 30 days
EPSS Percentile
35.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0043 is in the 90th percentile among its peer group of 15,940 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 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 (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: zsh-0:5.0.2-31.el7
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: zsh
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: zsh

Vendor Advisories (1)

redhatCVE-2018-1071Low

zsh: Stack-based buffer overflow in exec.c:hashcmd()

Mar 9, 2018

References

access.redhat.com / errata/RHSA-2018:3073
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
lists.debian.org / debian-lts-announce/2018/03/msg00038.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2020/12/msg00000.html
security.gentoo.org / glsa/201805-10
Third Party Advisory
usn.ubuntu.com / 3608-1
Third Party Advisory
securityfocus.com / bid/103359
Third Party AdvisoryVDB Entry