Contiki-NG up to 4.8 os/net/ipv6/uip-nd6.c uip_ds6_nbr_t null pointer dereference

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7.5$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Contiki-NG up to 4.8. Impacted is the function uip_ds6_nbr_t of the file os/net/ipv6/uip-nd6.c. Such manipulation leads to null pointer dereference. This vulnerability is documented as CVE-2023-31129. The attack can be executed remotely. There is not any exploit available. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability was found in Contiki-NG up to 4.8. It has been rated as problematic. Affected by this issue is the function uip_ds6_nbr_t of the file os/net/ipv6/uip-nd6.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. CVE summarizes:

The Contiki-NG operating system versions 4.8 and prior can be triggered to dereference a NULL pointer in the message handling code for IPv6 router solicitiations. Contiki-NG contains an implementation of IPv6 Neighbor Discovery (ND) in the module `os/net/ipv6/uip-nd6.c`. The ND protocol includes a message type called Router Solicitation (RS), which is used to locate routers and update their address information via the SLLAO (Source Link-Layer Address Option). If the indicated source address changes, a given neighbor entry is set to the STALE state. The message handler does not check for RS messages with an SLLAO that indicates a link-layer address change that a neighbor entry can actually be created for the indicated address. The resulting pointer is used without a check, leading to the dereference of a NULL pointer of type `uip_ds6_nbr_t`. The problem has been patched in the `develop` branch of Contiki-NG, and will be included in the upcoming 4.9 release. As a workaround, users can apply Contiki-NG pull request #2271 to patch the problem directly.

The weakness was released 05/09/2023 as GHSA-x29r-5qjg-75mq. The advisory is available at github.com. This vulnerability is handled as CVE-2023-31129 since 04/24/2023. 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.

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Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.5

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

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Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

04/24/2023 🔍
05/09/2023 +15 days 🔍
05/09/2023 +0 days 🔍
05/31/2023 +22 days 🔍

Sourcesinfo

Product: github.com

Advisory: GHSA-x29r-5qjg-75mq
Status: Confirmed

CVE: CVE-2023-31129 (🔍)
GCVE (CVE): GCVE-0-2023-31129
GCVE (VulDB): GCVE-100-228266

Entryinfo

Created: 05/09/2023 07:33
Updated: 05/31/2023 09:50
Changes: 05/09/2023 07:33 (51), 05/31/2023 09:50 (11)
Complete: 🔍
Cache ID: 216::103

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