SB2001010901 - Multiple vulnerabilities in Linux kernel

Description

This security bulletin contains information about 2 vulnerabilities.

1) (CVE-ID: CVE-2015-1838)

CWE-ID: CWE-19 - Data Handling

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local authenticated user to read and manipulate data.

modules/serverdensity_device.py in SaltStack before 2014.7.4 does not properly handle files in /tmp.

2) Symlink attack (CVE-ID: CVE-2000-1134)

CWE-ID: CWE-61 - UNIX Symbolic Link (Symlink) Following

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to escalate privileges on the system.

Multiple shell programs on various Unix systems, including (1) tcsh, (2) csh, (3) sh, and (4) bash, follow symlinks when processing << redirects (aka here-documents or in-here documents), which allows local users to overwrite files of other users via a symlink attack.

Remediation

Install update from vendor's website.

References

• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.85
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.166
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.142