Contiki-NG up to 4.8 TCP MSS Option os/net/ipv6/uip6.c uip_buf out-of-bounds
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
6.3 | $0-$5k | 0.00 |
A vulnerability classified as problematic was found in Contiki-NG up to 4.8. This vulnerability affects an unknown code block of the file os/net/ipv6/uip6.c of the component TCP MSS Option Handler. The manipulation of the argument uip_buf
with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality. CVE summarizes:
Contiki-NG is an open-source, cross-platform operating system for IoT devices. When reading the TCP MSS option value from an incoming packet, the Contiki-NG OS does not verify that certain buffer indices to read from are within the bounds of the IPv6 packet buffer, uip_buf. In particular, there is a 2-byte buffer read in the module os/net/ipv6/uip6.c. The buffer is indexed using 'UIP_IPTCPH_LEN + 2 + c' and 'UIP_IPTCPH_LEN + 3 + c', but the uip_buf buffer may not have enough data, resulting in a 2-byte read out of bounds. The problem has been patched in the "develop" branch of Contiki-NG, and is expected to be included in release 4.9. Users are advised to watch for the 4.9 release and to upgrade when it becomes available. There are no workarounds for this vulnerability aside from manually patching with the diff in commit `cde4e9839`.
The weakness was released 06/09/2023 as GHSA-3v7c-jq9x-cmph. The advisory is available at github.com. This vulnerability was named CVE-2023-34100 since 05/25/2023. Technical details are known, but there is no available exploit.
Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.
Entries connected to this vulnerability are available at VDB-219357, VDB-223344, VDB-227523 and VDB-228266.
Product
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔒VulDB CVSS-BT Score: 🔒
VulDB Vector: 🔒
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 6.4VulDB Meta Temp Score: 6.3
VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍
NVD Base Score: 6.5
NVD Vector: 🔒
CNA Base Score: 7.3
CNA Vector (GitHub, Inc.): 🔒
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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unlock | unlock | unlock | unlock | unlock | unlock |
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unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Exploiting
Class: Out-of-boundsCWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒
Local: No
Remote: Yes
Availability: 🔒
Status: Not defined
EPSS Score: 🔒
EPSS Percentile: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒
0-Day | unlock | unlock | unlock | unlock |
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Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: PatchStatus: 🔍
0-Day Time: 🔒
Patch: github.com
Timeline
05/25/2023 CVE reserved06/09/2023 Advisory disclosed
06/09/2023 VulDB entry created
07/07/2023 VulDB entry last update
Sources
Advisory: GHSA-3v7c-jq9x-cmphStatus: Confirmed
CVE: CVE-2023-34100 (🔒)
See also: 🔒
Entry
Created: 06/09/2023 22:30Updated: 07/07/2023 19:06
Changes: 06/09/2023 22:30 (51), 07/07/2023 19:06 (12)
Complete: 🔍
Cache ID: 18:A2E:103
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