Information disclosure in sudo (Alpine package)

1) Information disclosure

EUVDB-ID: #VU32438

Risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2014-9680

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a local authenticated user to gain access to sensitive information.

sudo before 1.8.12 does not ensure that the TZ environment variable is associated with a zoneinfo file, which allows local users to open arbitrary files for read access (but not view file contents) by running a program within an sudo session, as demonstrated by interfering with terminal output, discarding kernel-log messages, or repositioning tape drives.

Mitigation

Install update from vendor's website.

Vulnerable software versions

sudo (Alpine package): 1.8.1p1-r0 - 1.8.11_p2-r0

External links

http://git.alpinelinux.org/aports/commit/?id=b1df3371d233b3c91a9e14e1ff2650f07e2d38d3
http://git.alpinelinux.org/aports/commit/?id=484e6f932c3ce72e6de3242d9ac39bf3447056aa
http://git.alpinelinux.org/aports/commit/?id=cc5152318c70bce1404f00830e652a389338da8b
http://git.alpinelinux.org/aports/commit/?id=6a6fde0b6ddc9eb00d12e9b4a02294bdc2845053

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.