Published: 02/05/2016 Updated: 17/01/2023

CVSS v2 Base Score: 7.8 | Impact Score: 6.9 | Exploitability Score: 10

CVSS v3 Base Score: 7.5 | Impact Score: 3.6 | Exploitability Score: 3.9

VMScore: 694

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C

The tcp_cwnd_reduction function in net/ipv4/tcp_input.c in the Linux kernel prior to 4.3.5 allows remote malicious users to cause a denial of service (divide-by-zero error and system crash) via crafted TCP traffic.

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A divide-by-zero vulnerability was found in a way the kernel processes TCP connections The error can occur if a connection starts another cwnd reduction phase by setting tp->prior_cwnd to the current cwnd (0) in tcp_init_cwnd_reduction() A remote, unauthenticated attacker could use this flaw to crash the kernel (denial of service) ...

CWE-189 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 https://nvd.nist.gov https://access.redhat.com/security/cve/cve-2016-2070

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CVE-2016-2070

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