Contiki-NG up to 4.5 SNMP Agent snmp_oid_decode_oid SNMP Request out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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8.5$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Contiki-NG up to 4.5. Affected by this vulnerability is the function snmp_oid_decode_oid of the component SNMP Agent. Such manipulation as part of SNMP Request leads to out-of-bounds write. This vulnerability is listed as CVE-2020-14936. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Contiki-NG up to 4.5. It has been rated as critical. Affected by this issue is the function snmp_oid_decode_oid of the component SNMP Agent. The manipulation as part of a SNMP Request leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Buffer overflows were discovered in Contiki-NG 4.4 through 4.5, in the SNMP agent. Functions parsing the OIDs in SNMP requests lack sufficient allocated target-buffer capacity verification when writing parsed OID values. The function snmp_oid_decode_oid() may overwrite memory areas beyond the provided target buffer, when called from snmp_message_decode() upon an SNMP request reception. Because the content of the write operations is externally provided in the SNMP requests, it enables a remote overwrite of an IoT device's memory regions beyond the allocated buffer. This overflow may allow remote overwrite of stack and statically allocated variables memory regions by sending a crafted SNMP request.

The weakness was presented 08/18/2020. This vulnerability is handled as CVE-2020-14936 since 06/21/2020. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

See VDB-160029, VDB-160027 and VDB-160026 for similar entries. Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.5

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/21/2020 🔍
08/18/2020 +58 days 🔍
08/19/2020 +1 days 🔍
08/19/2020 +0 days 🔍

Sourcesinfo

Status: Not defined

CVE: CVE-2020-14936 (🔍)
GCVE (CVE): GCVE-0-2020-14936
GCVE (VulDB): GCVE-100-160028
See also: 🔍

Entryinfo

Created: 08/19/2020 06:28
Updated: 08/19/2020 06:33
Changes: 08/19/2020 06:28 (37), 08/19/2020 06:33 (17)
Complete: 🔍
Cache ID: 216::103

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