5.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3 Medium
AI Score
Confidence
High
0.0005 Low
EPSS
Percentile
17.0%
Contiki-NG is an operating system for internet-of-things devices. In versions 4.9 and prior, when processing the various IPv6 header fields during IPHC header decompression, Contiki-NG confirms the received packet buffer contains enough data as needed for that field. But no similar check is done before decompressing the IPv6 address. Therefore, up to 16 bytes can be read out of bounds on the line with the statement memcpy(&ipaddr->u8[16 - postcount], iphc_ptr, postcount);
. The value of postcount
depends on the address compression used in the received packet and can be controlled by the attacker. As a result, an attacker can inject a packet that causes an out-of-bound read. As of time of publication, a patched version is not available. As a workaround, one can apply the changes in Contiki-NG pull request #2509 to patch the system.
Vendor | Product | Version | CPE |
---|---|---|---|
contiki\-ng | contiki\-ng\. | * | cpe:2.3:o:contiki\-ng:contiki\-ng\.:*:*:*:*:*:*:*:* |
[
{
"vendor": "contiki-ng",
"product": "contiki-ng",
"versions": [
{
"version": "<= 4.9",
"status": "affected"
}
]
}
]
5.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3 Medium
AI Score
Confidence
High
0.0005 Low
EPSS
Percentile
17.0%