CVE-2019-18805
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.43%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.43% probability · 88th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-190
- Affected
- linux/linux kernel · opensuse/leap · redhat/enterprise linux · netapp/active iq unified manager · netapp/data availability services · netapp/e-series santricity os controller · netapp/hci management node · netapp/solidfire · netapp/steelstore cloud integrated storage · netapp/hci compute node · netapp/hci storage node · broadcom/fabric operating system · netapp/aff a700s firmware · netapp/fas8300 firmware · netapp/fas8700 firmware · netapp/aff a400 firmware · netapp/h610s firmware
- Source
- cve@mitre.org
References
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00035.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00039.htmlMailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0740Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.11Mailing List, Patch, Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19fad20d15a6494f47f85d869f00b11343ee5c78Mailing List, Patch, Vendor Advisory
- https://security.netapp.com/advisory/ntap-20191205-0001/Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00035.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00039.htmlMailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0740Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.11Mailing List, Patch, Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19fad20d15a6494f47f85d869f00b11343ee5c78Mailing List, Patch, Vendor Advisory
- https://security.netapp.com/advisory/ntap-20191205-0001/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.