CVE-2018-17456

CRITICALEPSS 100th pctl

9.8

CVSS v3

Description

Git before 2.14.5, 2.15.x before 2.15.3, 2.16.x before 2.16.5, 2.17.x before 2.17.2, 2.18.x before 2.18.1, and 2.19.x before 2.19.1 allows remote code execution during processing of a recursive "git clone" of a superproject if a .gitmodules file has a URL field beginning with a '-' character.

CWE-88

How to fix

Remediation Available

gitDebian

Fixed in:1:2.19.1-1CVE-2018-17456

gitUbuntu

Fixed in:1:1.9.1-1ubuntu0.9USN-3791-1

Fixed in:1:2.7.4-0ubuntu1.5USN-3791-1

Fixed in:1:2.17.1-1ubuntu0.3USN-3791-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

97.36%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

References

Patch2

Exploit2

Third-Party Advisory12

Other references2

Related Vulnerabilities

Other CWE-88 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2016-10033	Critical	9.8	100%	KEV	Fix
CVE-2022-36804	High	8.8	99%	KEV	Fix
CVE-2026-24061	Critical	9.8	98%	KEV	Fix
CVE-2007-0882	High	10.0	98%	-	-
CVE-2018-19518	High	7.5	95%	-	Fix
CVE-2021-33564	Critical	9.8	72%	-	Fix

Common questions

How do I fix CVE-2018-17456?

Published advisories record a fix for 2 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2018-17456 being actively exploited?

Not that we know of. CVE-2018-17456 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 97.4% is the estimated probability that it will be exploited in the next 30 days. That is higher than 100% of all scored CVEs.

How severe is CVE-2018-17456?

CVE-2018-17456 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2018-17456 affect?

Published advisories record a fix for git (Debian), git (Ubuntu). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.