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CVE-2018-1000021

18
FAUCET Score

CVE-2018-1000021 is an input validation error in Git versions 2.15.1 and earlier, affecting the git-scm client. This vulnerability carries a medium severity CVSS score of 5.0, indicating that an attacker could exploit it remotely with high attack complexity, requiring user interaction with a malicious Git server or a Man-in-the-Middle attack to achieve impacts ranging from terminal configuration issues to Remote Code Execution. Currently, there is 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
<= 2.15.1CPE matchmatch criteria
cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.0MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
1.6
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.07%
Probability of exploitation in next 30 days
EPSS Percentile
61.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0107 is in the 75th percentile among its peer group of 707 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.2 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (4)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: git
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: git
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: git
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-git29-git

Vendor Advisories (1)

redhatCVE-2018-1000021Moderate

git: client prints server-sent ANSI escape codes to the terminal, allowing for unverified messages to potentially execute arbitrary commands

Jan 6, 2018

References

batterystapl.es / 2018/01/security-implications-of-ansi-escape.html
Third Party Advisory