Upstream information
Description
An issue was discovered in Contiki through 3.0 and Contiki-NG through 4.5. The code for parsing Type A domain name answers in ip64-dns64.c doesn't verify whether the address in the answer's length is sane. Therefore, when copying an address of an arbitrary length, a buffer overflow can occur. This bug can be exploited whenever NAT64 is enabled.SUSE information
Overall state of this security issue: Does not affect SUSE products
This issue is currently rated as having critical severity.
| CVSS detail | National Vulnerability Database |
|---|---|
| Base Score | 7.5 |
| Vector | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| Access Vector | Network |
| Access Complexity | Low |
| Authentication | None |
| Confidentiality Impact | Partial |
| Integrity Impact | Partial |
| Availability Impact | Partial |
| CVSS detail | National Vulnerability Database |
|---|---|
| Base Score | 9.8 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality Impact | High |
| Integrity Impact | High |
| Availability Impact | High |
| CVSSv3 Version | 3.1 |
Note from the SUSE Security Team
SUSE does not ship the uIP stack, also the affected code is not in open-iscsi, so SUSE is not affected by this problem. SUSE Bugzilla entry: 1179907 [NEW] No SUSE Security Announcements cross referenced.SUSE Timeline for this CVE
CVE page created: Thu Dec 10 17:28:55 2020CVE page last modified: Mon Oct 6 19:26:34 2025