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[email protected]CVE-2021-21257

HistoryJun 18, 2021 - 9:15 p.m.

CVE-2021-21257

2021-06-1821:15:07

CWE-787

[email protected]

web.nvd.nist.gov

contiki-ng

rpl-classic

rpl-lite

internet of things

security

vulnerability

patch

nvd

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

8.2 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

LOW

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

0.001 Low

EPSS

Percentile

43.1%

JSON

Contiki-NG is an open-source, cross-platform operating system for internet of things devices. The RPL-Classic and RPL-Lite implementations in the Contiki-NG operating system versions prior to 4.6 do not validate the address pointer in the RPL source routing header This makes it possible for an attacker to cause out-of-bounds writes with packets injected into the network stack. Specifically, the problem lies in the rpl_ext_header_srh_update function in the two rpl-ext-header.c modules for RPL-Classic and RPL-Lite respectively. The addr_ptr variable is calculated using an unvalidated CMPR field value from the source routing header. An out-of-bounds write can be triggered on line 151 in os/net/routing/rpl-lite/rpl-ext-header.c and line 261 in os/net/routing/rpl-classic/rpl-ext-header.c, which contain the following memcpy call with addr_ptr as destination. The problem has been patched in Contiki-NG 4.6. Users can apply a patch out-of-band as a workaround.

Affected configurations

Vulners

NVD

Node

contiki-ngcontiki-ng.Range<4.6

VendorProductVersionCPE
contiki\-ngcontiki\-ng\.*cpe:2.3:o:contiki\-ng:contiki\-ng\.:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
contiki\-ng	contiki\-ng\.	*	cpe:2.3:o:contiki\-ng:contiki\-ng\.::::::::

CNA Affected

[
  {
    "product": "contiki-ng",
    "vendor": "contiki-ng",
    "versions": [
      {
        "status": "affected",
        "version": "< 4.6"
      }
    ]
  }
]

References

github.com/contiki-ng/contiki-ng/pull/1431

github.com/contiki-ng/contiki-ng/security/advisories/GHSA-mvc7-9p4q-c5cm

Social References

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

8.2 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

LOW

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

0.001 Low

EPSS

Percentile

43.1%

JSON

Related for CVE-2021-21257

prion1 cvelist1 nvd1