CVE-2019-9183
A buffer overflow is present due to an integer underflow during 6LoWPAN fragment processing in the face of truncated fragments in os/net/ipv6/sicslowpan.c.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.31%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An issue was discovered in Contiki-NG through 4.3 and Contiki through 3.0. A buffer overflow is present due to an integer underflow during 6LoWPAN fragment processing in the face of truncated fragments in os/net/ipv6/sicslowpan.c. This results in accesses of unmapped memory, crashing the application. An attacker can cause a denial-of-service via a crafted 6LoWPAN frame.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.31% probability · 82th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-191, CWE-787
- Affected
- contiki-ng/contiki-ng · contiki-os/contiki
- Source
- cve@mitre.org
References
- https://github.com/contiki-ng/contiki-ng/pull/972Patch, Third Party Advisory
- https://github.com/contiki-ng/contiki-ng/releases/tag/release%2Fv4.4Release Notes, Third Party Advisory
- https://www.usenix.org/system/files/sec20summer_clements_prepub.pdfTechnical Description, Third Party Advisory
- https://github.com/contiki-ng/contiki-ng/pull/972Patch, Third Party Advisory
- https://github.com/contiki-ng/contiki-ng/releases/tag/release%2Fv4.4Release Notes, Third Party Advisory
- https://www.usenix.org/system/files/sec20summer_clements_prepub.pdfTechnical Description, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.