Vulnerability identifier: #VU30638
Vulnerability risk: High
CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-190
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor: Linux Foundation
Description
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
An issue was discovered in net/ipv4/sysctl_net_ipv4.c in the Linux kernel before 5.0.11. There is a net/ipv4/tcp_input.c signed integer overflow in tcp_ack_update_rtt() when userspace writes a very large integer to /proc/sys/net/ipv4/tcp_min_rtt_wlen, leading to a denial of service or possibly unspecified other impact, aka CID-19fad20d15a6.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Linux kernel: 5.0.0 - 5.0.10
External links
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00035.html
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00039.html
http://access.redhat.com/errata/RHSA-2020:0740
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.11
http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19fad20d15a6494f47f85d869f00b11343ee5c78
http://security.netapp.com/advisory/ntap-20191205-0001/
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.