Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 18.04

Description

It was discovered that Ruby incorrectly handled certain files. An attacker could possibly use this issue to pass path matching what can lead to an unauthorized access. (CVE-2019-15845)

It was discovered that Ruby incorrectly handled certain regular expressions. An attacker could use this issue to cause a denial of service. (CVE-2019-16201)

It was discovered that Ruby incorrectly handled certain HTTP headers. An attacker could possibly use this issue to execute arbitrary code. (CVE-2019-16254)

It was discovered that Ruby incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. (CVE-2019-16255)

CVEs contained in this USN include: CVE-2019-15845, CVE-2019-16201, CVE-2019-16254, CVE-2019-16255

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• All versions of Cloud Foundry cflinuxfs3 prior to 0.148.0

Mitigation

Users of affected products are strongly encouraged to follow one of the mitigations below:

• The Cloud Foundry project recommends that Cloud Foundry deployments run with cflinuxfs3 version 0.148.0 or later.

References

• USN-4201-1
• CVE-2019-15845
• CVE-2019-16201
• CVE-2019-16254
• CVE-2019-16255