SB2018020127 - Ubuntu update for w3m
Published: February 1, 2018
Security Bulletin ID
SB2018020127
Severity
Low
Patch available
YES
Number of vulnerabilities
3
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Denial of service (CVE-ID: CVE-2018-6196)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists due to the feed_table_block_tag function in table.c does not prevent a negative indent value. A remote attacker can trigger an infinite recursion flaw in HTMLlineproc0 and cause the service to crash.
2) Denial of service (CVE-ID: CVE-2018-6197)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists due to NULL pointer dereference flaw in formUpdateBuffer in form.c. A remote attacker can cause the service to crash.
3) Security restrictions bypass (CVE-ID: CVE-2018-6198)
The vulnerability allows a local attacker to cause DoS condition on the target system.The weakness exists due to improper handling of temporary files when the ~/.w3m directory is unwritable. A local attacker can craft a symlink attack to bypass security restrictions and overwrite arbitrary files.
Remediation
Install update from vendor's website.