USN-3817-1: Python vulnerabilities
Severity
Medium
Vendor
Canonical Ubuntu
Versions Affected
- Canonical Ubuntu 14.04
- Canonical Ubuntu 16.04
- Canonical Ubuntu 18.04
Description
It was discovered that Python incorrectly handled large amounts of data. A remote attacker could use this issue to cause Python to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2018-1000030)
It was discovered that Python incorrectly handled running external commands in the shutil module. A remote attacker could use this issue to cause Python to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2018-1000802)
It was discovered that Python incorrectly used regular expressions vulnerable to catastrophic backtracking. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2018-1060, CVE-2018-1061)
It was discovered that Python failed to initialize Expat’s hash salt. A remote attacker could possibly use this issue to cause hash collisions, leading to a denial of service. (CVE-2018-14647)
CVEs contained in this USN include: CVE-2018-1000030, CVE-2018-1000802, CVE-2018-1060, CVE-2018-1061, CVE-2018-14647
Affected Cloud Foundry Products and Versions
Severity is medium unless otherwise noted.
- Cloud Foundry BOSH trusty-stemcells are vulnerable, including:
- 3586.x versions prior to 3586.56
- 3541.x versions prior to 3541.60
- 3468.x versions prior to 3468.86
- 3445.x versions prior to 3445.82
- 3421.x versions prior to 3421.99
- All other stemcells not listed.
- Cloud Foundry BOSH xenial-stemcells are vulnerable, including:
- 170.x versions prior to 170.6
- 97.x versions prior to 97.33
- All other stemcells not listed.
- All versions of Cloud Foundry cflinuxfs2 prior to 1.249.0
- All versions of Cloud Foundry cflinuxfs3 prior to 0.38.0
Mitigation
Users of affected products are strongly encouraged to follow one of the mitigations below:
- The Cloud Foundry project recommends upgrading the following BOSH trusty-stemcells:
- Upgrade 3586.x versions to 3586.56
- Upgrade 3541.x versions to 3541.60
- Upgrade 3468.x versions to 3468.86
- Upgrade 3445.x versions to 3445.82
- Upgrade 3421.x versions to 3421.99
- All other stemcells should be upgraded to the latest version available on bosh.io.
- The Cloud Foundry project recommends upgrading the following BOSH xenial-stemcells:
- Upgrade 170.x versions to 170.6
- Upgrade 97.x versions to 97.33
- All other stemcells should be upgraded to the latest version available on bosh.io.
- The Cloud Foundry project recommends that Cloud Foundry deployments run with cflinuxfs2 version 1.249.0 or later.
- The Cloud Foundry project recommends that Cloud Foundry deployments run with cflinuxfs3 version 0.38.0 or later.
