CVE-2019-18805

HIGH

Description

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.

References

http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00035.html

http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00039.html

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.11

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19fad20d15a6494f47f85d869f00b11343ee5c78

Details

Source: MITRE

Published: 2019-11-07

Updated: 2019-11-14

Type: CWE-190

Risk Information

CVSS v2.0

Base Score: 7.5

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

Impact Score: 6.4

Exploitability Score: 10

Severity: HIGH

CVSS v3.0

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 3.9

Severity: CRITICAL

Vulnerable Software

Configuration 1

OR

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Tenable Plugins

View all (20 total)

IDNameProductFamilySeverity
145850CentOS 8 : kernel (CESA-2020:1769)NessusCentOS Local Security Checks
high
144731EulerOS Virtualization for ARM 64 3.0.2.0 : kernel (EulerOS-SA-2021-1039)NessusHuawei Local Security Checks
high
138766NewStart CGSL MAIN 6.01 : kernel Multiple Vulnerabilities (NS-SA-2020-0030)NessusNewStart CGSL Local Security Checks
high
136116RHEL 8 : kernel-rt (RHSA-2020:1567)NessusRed Hat Local Security Checks
high
136115RHEL 8 : kernel (RHSA-2020:1769)NessusRed Hat Local Security Checks
high
135525EulerOS 2.0 SP3 : kernel (EulerOS-SA-2020-1396)NessusHuawei Local Security Checks
critical
134735EulerOS Virtualization 3.0.2.2 : kernel (EulerOS-SA-2020-1269)NessusHuawei Local Security Checks
high
134387EulerOS 2.0 SP8 : kernel (EulerOS-SA-2020-1186)NessusHuawei Local Security Checks
critical
134361RHEL 7 : kernel-alt (RHSA-2020:0740)NessusRed Hat Local Security Checks
high
132925SUSE SLES12 Security Update : kernel (SUSE-SU-2020:0093-1)NessusSuSE Local Security Checks
critical
132394SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2019:3381-1)NessusSuSE Local Security Checks
critical
132390SUSE SLES12 Security Update : kernel (SUSE-SU-2019:3379-1)NessusSuSE Local Security Checks
high
132389SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2019:3371-1)NessusSuSE Local Security Checks
high
132237SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2019:3317-1)NessusSuSE Local Security Checks
critical
132071SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2019:3295-1)NessusSuSE Local Security Checks
high
131833SUSE SLES12 Security Update : kernel (SUSE-SU-2019:3200-1)NessusSuSE Local Security Checks
high
131120SUSE SLES12 Security Update : kernel (SUSE-SU-2019:2984-1)NessusSuSE Local Security Checks
critical
131061openSUSE Security Update : the Linux Kernel (openSUSE-2019-2507)NessusSuSE Local Security Checks
high
131057openSUSE Security Update : the Linux Kernel (openSUSE-2019-2503)NessusSuSE Local Security Checks
high
130951SUSE SLES12 Security Update : kernel (SUSE-SU-2019:2953-1)NessusSuSE Local Security Checks
high