CVE-2018-16471
Publication date 13 November 2018
Last updated 24 July 2024
Ubuntu priority
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
| Package | Ubuntu Release | Status |
|---|---|---|
| ruby-rack | 22.04 LTS jammy |
Not affected
|
| 20.04 LTS focal |
Not affected
|
|
| 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
|
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Get Ubuntu ProSeverity 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 |
References
Related Ubuntu Security Notices (USN)
- USN-4089-1
- Rack vulnerability
- 7 August 2019