USN-3834-1: Perl vulnerabilities
Severity
Medium
Vendor
Canonical Ubuntu
Versions Affected
- Canonical Ubuntu 14.04
- Canonical Ubuntu 16.04
- Canonical Ubuntu 18.04
Description
Jayakrishna Menon discovered that Perl incorrectly handled Perl_my_setenv. An attacker could use this issue to cause Perl to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2018-18311)
Eiichi Tsukata discovered that Perl incorrectly handled certain regular expressions. An attacker could use this issue to cause Perl to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 18.10. (CVE-2018-18312)
Eiichi Tsukata discovered that Perl incorrectly handled certain regular expressions. An attacker could use this issue to cause Perl to crash, resulting in a denial of service. (CVE-2018-18313)
Jakub Wilk discovered that Perl incorrectly handled certain regular expressions. An attacker could use this issue to cause Perl to crash, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 18.10. (CVE-2018-18314)
CVEs contained in this USN include: CVE-2018-18311, CVE-2018-18312, CVE-2018-18313, CVE-2018-18314
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 3586.65
- 3541.x versions prior to 3541.69
- 3468.x versions prior to 3468.90
- 3445.x versions prior to 3445.87
- 3421.x versions prior to 3421.104
- All other stemcells not listed.
- Cloud Foundry BOSH xenial-stemcells are vulnerable, including:
- 170.x versions prior to 170.12
- 97.x versions prior to 97.39
- All other stemcells not listed.
- All versions of Cloud Foundry cflinuxfs2 prior to 1.253.0
- All versions of Cloud Foundry cflinuxfs3 prior to 0.44.0
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 3586.65
- Upgrade 3541.x versions to 3541.69
- Upgrade 3468.x versions to 3468.90
- Upgrade 3445.x versions to 3445.87
- Upgrade 3421.x versions to 3421.104
- 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 170.12
- Upgrade 97.x versions to 97.39
- 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 1.253.0 or later.
- The Cloud Foundry project recommends that Cloud Foundry deployments run with cflinuxfs3 version 0.44.0 or later.
