SB2016050218 - Division by zero in Linux kernel ipv4
Published: May 2, 2016
Security Bulletin ID
SB2016050218
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Division by zero (CVE-ID: CVE-2016-2070)
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a division by zero error within the tcp_cwnd_reduction() function in net/ipv4/tcp_input.c. A remote non-authenticated attacker can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8b8a321ff72c785ed5e8b4cf6eda20b35d427390
- https://bugzilla.redhat.com/show_bug.cgi?id=1302219
- https://github.com/torvalds/linux/commit/8b8a321ff72c785ed5e8b4cf6eda20b35d427390
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.5
- http://www.openwall.com/lists/oss-security/2016/01/25/5