CVE-2018-16471

Publication date 13 November 2018

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

There is a possible XSS vulnerability in Rack before 2.0.6 and 1.6.11. Carefully crafted requests can impact the data returned by the `scheme` method on `Rack::Request`. Applications that expect the scheme to be limited to 'http' or 'https' and do not escape the return value could be vulnerable to an XSS attack. Note that applications using the normal escaping mechanisms provided by Rails may not impacted, but applications that bypass the escaping mechanisms, or do not use them may be vulnerable.

From the Ubuntu Security Team

It was discovered that Rack incorrectly handled carefully crafted requests. A remote attacker could use this issue to execute a cross-site scripting (XSS) attack.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
ruby-rack	22.04 LTS jammy	Not affected
	21.10 impish	Not affected
	21.04 hirsute	Not affected
	20.10 groovy	Not affected
	20.04 LTS focal	Not affected
	19.10 eoan	Not affected
	19.04 disco	Not affected
	18.10 cosmic	Ignored end of life
	18.04 LTS bionic	Fixed 1.6.4-4ubuntu0.1
	16.04 LTS xenial	Fixed 1.6.4-3ubuntu0.1
	14.04 LTS trusty	Fixed 1.5.2-3+deb8u3 Ubuntu Pro

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Severity score breakdown

Parameter	Value
Base score	6.1 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Changed
Confidentiality	Low
Integrity impact	Low
Availability impact	None
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVE-2018-16471

Cvss 3 Severity Score

From the Ubuntu Security Team

Status

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Severity score breakdown

References

Related Ubuntu Security Notices (USN)

Other references