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USN-3538-1: OpenSSH vulnerabilities


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USN-3538-1: OpenSSH vulnerabilities

Severity

Low

Vendor

Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 14.04

Description

Jann Horn discovered that OpenSSH incorrectly loaded PKCS#11 modules from untrusted directories. A remote attacker could possibly use this issue to execute arbitrary PKCS#11 modules. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-10009)

Jann Horn discovered that OpenSSH incorrectly handled permissions on Unix-domain sockets when privilege separation is disabled. A local attacker could possibly use this issue to gain privileges. This issue only affected Ubuntu 16.04 LTS. (CVE-2016-10010)

Jann Horn discovered that OpenSSH incorrectly handled certain buffer memory operations. A local attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-10011)

Guido Vranken discovered that OpenSSH incorrectly handled certain shared memory manager operations. A local attacker could possibly use issue to gain privileges. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-10012)

Michal Zalewski discovered that OpenSSH incorrectly prevented write operations in readonly mode. A remote attacker could possibly use this issue to create zero-length files, leading to a denial of service. (CVE-2017-15906)

Affected Cloud Foundry Products and Versions

Severity is low unless otherwise noted.

  • Cloud Foundry BOSH stemcells are vulnerable, including:
    • 3312.x versions prior to 3312.51
    • 3363.x versions prior to 3363.48
    • 3421.x versions prior to 3421.38
    • 3445.x versions prior to 3445.24
    • 3468.x versions prior to 3468.20
    • All other stemcells not listed.

Mitigation

OSS users are strongly encouraged to follow one of the mitigations below:

  • The Cloud Foundry project recommends upgrading the following BOSH stemcells:
    • Upgrade 3312.x versions to 3312.51
    • Upgrade 3363.x versions to 3363.48
    • Upgrade 3421.x versions to 3421.38
    • Upgrade 3445.x versions to 3445.24
    • Upgrade 3468.x versions to 3468.20
    • All other stemcells should be upgraded to the latest version available on bosh.io.

References

Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR

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