CVE & CISA-KEV Catalog

CVE-2017-5120

MEDIUM

6.5

CVSS v3

Description

Inappropriate use of www mismatch redirects in browser navigation in Google Chrome prior to 61.0.3163.79 for Mac, Windows, and Linux, and 61.0.3163.81 for Android, allowed a remote attacker to potentially downgrade HTTPS requests to HTTP via a crafted HTML page. In other words, Chrome could transmit cleartext even though the user had entered an https URL, because of a misdesigned workaround for cases where the domain name in a URL almost matches the domain name in an X.509 server certificate (but differs in the initial "www." substring).

How to fix

Remediation Available

Google ChromeWindows application

Affected:61.0.3163.79Fixed in:61.0.3163.79Google LLC

Affected:61.0.3163.81Fixed in:61.0.3163.81Google LLC

Google Chrome (EXE)Windows application

Affected:61.0.3163.79Fixed in:61.0.3163.79Google LLC

Affected:61.0.3163.81Fixed in:61.0.3163.81Google LLC

Google Chrome BetaWindows application

Affected:61.0.3163.81Fixed in:61.0.3163.81Google LLC

Affected:61.0.3163.79Fixed in:61.0.3163.79Google LLC

Google Chrome Beta (EXE)Windows application

Affected:61.0.3163.79Fixed in:61.0.3163.79Google LLC

Affected:61.0.3163.81Fixed in:61.0.3163.81Google LLC

Google Chrome CanaryWindows application

Affected:61.0.3163.81Fixed in:61.0.3163.81Google LLC

Affected:61.0.3163.79Fixed in:61.0.3163.79Google LLC

Google Chrome DevWindows application

Affected:61.0.3163.79Fixed in:61.0.3163.79Google LLC

Affected:61.0.3163.81Fixed in:61.0.3163.81Google LLC

Google Chrome Dev (EXE)Windows application

Affected:61.0.3163.81Fixed in:61.0.3163.81Google LLC

Affected:61.0.3163.79Fixed in:61.0.3163.79Google LLC

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 InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

1.13%probability of exploitation in 30 days

62ndpercentile

Moderate risk: more likely to be exploited than 62% of all known CVEs.

References

Other references7

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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 2026-05-13.