CVE-2018-6198 - Improper Link Resolution Before File Access ('Link Following')

Severity

32%

Complexity

34%

Confidentiality

81%

w3m through 0.5.3 does not properly handle temporary files when the ~/.w3m directory is unwritable, which allows a local attacker to craft a symlink attack to overwrite arbitrary files.

w3m through 0.5.3 does not properly handle temporary files when the ~/.w3m directory is unwritable, which allows a local attacker to craft a symlink attack to overwrite arbitrary files.

CVSS 3.0 Base Score 4.7. CVSS Attack Vector: local. CVSS Attack Complexity: high. CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N).

CVSS 2.0 Base Score 3.3. CVSS Attack Vector: local. CVSS Attack Complexity: medium. CVSS Vector: (AV:L/AC:M/Au:N/C:N/I:P/A:P).

Overview

Type

Canonical Ubuntu Linux

First reported 7 years ago

2018-01-25 03:29:00

Last updated 5 years ago

2019-10-03 00:03:00

Affected Software

Canonical Ubuntu Linux 12.04 ESM (Extended Security Maintenance)

12.04

Canonical Ubuntu Linux 14.04 LTS (Long-Term Support)

14.04

Canonical Ubuntu Linux 16.04 LTS (Long-Term Support)

16.04

Canonical Ubuntu Linux 17.10

17.10

References

openSUSE-SU-2019:1142

102855

Third Party Advisory, VDB Entry

https://bugs.debian.org/888097

Issue Tracking, Patch, Third Party Advisory

https://github.com/tats/w3m/commit/18dcbadf2771cdb0c18509b14e4e73505b242753

Patch, Third Party Advisory

https://salsa.debian.org/debian/w3m/commit/18dcbadf2771cdb0c18509b14e4e73505b242753

Patch, Third Party Advisory

USN-3555-1

Third Party Advisory

USN-3555-2

Third Party Advisory

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