Critical severity · published Nov 7, 2019
CVE-2019-18805
An issue was discovered in net/ipv4/sysctl_net_ipv4.c in the Linux kernel before 5.0.11
9.8
CVSS
3.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.5% · higher than 89% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
4.4 before 4.4.180; 4.9 before 4.9.172; 4.14 before 4.14.115; 4.19 before 4.19.38; 5.0 before 5.0.11; 5.1; +6 more · source: NVD
AI
Active IQ Unified Manager · Netapp
All versions, or not specified · source: NVD
AA
Aff A400 Firmware · Netapp
All versions, or not specified · source: NVD
AA
Aff A700s Firmware · Netapp
All versions, or not specified · source: NVD
DA
Data Availability Services · Netapp
All versions, or not specified · source: NVD
ES
E-series Santricity OS Controller · Netapp
11.0.0 through 11.60.3 · source: NVD
EL
Enterprise Linux · Redhat
7.0 · source: NVD
FO
Fabric Operating System · Broadcom
All versions, or not specified · source: NVD
FF
Fas8300 Firmware · Netapp
All versions, or not specified · source: NVD
FF
Fas8700 Firmware · Netapp
All versions, or not specified · source: NVD
HF
H610s Firmware · Netapp
All versions, or not specified · source: NVD
HC
Hci Compute Node · Netapp
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-18805
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-18805
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00035.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00039.html
Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0740
Mailing List
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.11
Mailing List
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19fad20d15a6494f47f85d869f00b11343ee5c78
Third Party Advisory
https://security.netapp.com/advisory/ntap-20191205-0001/
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