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[email protected]NVD:CVE-2021-27853

HistorySep 27, 2022 - 6:15 p.m.

CVE-2021-27853

2022-09-2718:15:09

CWE-290

[email protected]

web.nvd.nist.gov

4.7 Medium

CVSS3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

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

0.001 Low

EPSS

Percentile

26.4%

JSON

Layer 2 network filtering capabilities such as IPv6 RA guard or ARP inspection can be bypassed using combinations of VLAN 0 headers and LLC/SNAP headers.

Affected configurations

NVD

Node

ieeeieee_802.2Range≤802.2h-1997

Node

ietfp802.1qRange≤d1.0

Node

ciscocatalyst_6503-eMatch-

AND

ciscocatalyst_6503-e_firmwareMatch15.5\(01.01.85\)sy07

Node

ciscocatalyst_6504-eMatch-

AND

ciscocatalyst_6504-e_firmwareMatch15.5\(01.01.85\)sy07

Node

ciscocatalyst_6506-eMatch-

AND

ciscocatalyst_6506-e_firmwareMatch15.5\(01.01.85\)sy07

Node

ciscocatalyst_6509-eMatch-

AND

ciscocatalyst_6509-e_firmwareMatch15.5\(01.01.85\)sy07

Node

ciscocatalyst_6509-neb-aMatch-

AND

ciscocatalyst_6509-neb-a_firmwareMatch15.5\(01.01.85\)sy07

Node

ciscocatalyst_6509-v-eMatch-

AND

ciscocatalyst_6509-v-e_firmwareMatch15.5\(01.01.85\)sy07

Node

ciscocatalyst_6513-eMatch-

AND

ciscocatalyst_6513-e_firmwareMatch15.5\(01.01.85\)sy07

Node

ciscocatalyst_6807-xl_firmwareMatch15.5\(01.01.85\)sy07

AND

ciscocatalyst_6807-xlMatch-

Node

ciscocatalyst_6840-x_firmwareMatch15.5\(01.01.85\)sy07

AND

ciscocatalyst_6840-xMatch-

Node

ciscocatalyst_6880-x_firmwareMatch15.5\(01.01.85\)sy07

AND

ciscocatalyst_6880-xMatch-

Node

ciscocatalyst_c6816-x-le_firmwareMatch15.5\(01.01.85\)sy07

AND

ciscocatalyst_c6816-x-leMatch-

Node

ciscocatalyst_c6824-x-le-40g_firmwareMatch15.5\(01.01.85\)sy07

AND

ciscocatalyst_c6824-x-le-40gMatch-

Node

ciscocatalyst_c6832-x-le_firmwareMatch15.5\(01.01.85\)sy07

AND

ciscocatalyst_c6832-x-leMatch-

Node

ciscocatalyst_c6840-x-le-40g_firmwareMatch15.5\(01.01.85\)sy07

AND

ciscocatalyst_c6840-x-le-40gMatch-

Node

ciscocatalyst_6800ia_firmwareMatch15.5\(01.01.85\)sy07

AND

ciscocatalyst_6800iaMatch-

Node

ciscoios_xeMatch17.3.3

ciscoios_xeMatch15.2\(07\)e02

ciscoios_xeMatch15.2\(07\)e03

ciscoios_xeMatch17.4.1

ciscoios_xeMatch17.6.1

AND

ciscocatalyst_3650-12x48fd-eMatch-

ciscocatalyst_3650-12x48fd-lMatch-

ciscocatalyst_3650-12x48fd-sMatch-

ciscocatalyst_3650-12x48uq-eMatch-

ciscocatalyst_3650-12x48uq-lMatch-

ciscocatalyst_3650-12x48uq-sMatch-

ciscocatalyst_3650-12x48ur-eMatch-

ciscocatalyst_3650-12x48ur-lMatch-

ciscocatalyst_3650-12x48ur-sMatch-

ciscocatalyst_3650-12x48uz-eMatch-

ciscocatalyst_3650-12x48uz-lMatch-

ciscocatalyst_3650-12x48uz-sMatch-

ciscocatalyst_3650-24pd-eMatch-

ciscocatalyst_3650-24pd-lMatch-

ciscocatalyst_3650-24pd-sMatch-

ciscocatalyst_3650-24pdm-eMatch-

ciscocatalyst_3650-24pdm-lMatch-

ciscocatalyst_3650-24pdm-sMatch-

ciscocatalyst_3650-24ps-eMatch-

ciscocatalyst_3650-24ps-lMatch-

ciscocatalyst_3650-24ps-sMatch-

ciscocatalyst_3650-24td-eMatch-

ciscocatalyst_3650-24td-lMatch-

ciscocatalyst_3650-24td-sMatch-

ciscocatalyst_3650-24ts-eMatch-

ciscocatalyst_3650-24ts-lMatch-

ciscocatalyst_3650-24ts-sMatch-

ciscocatalyst_3650-48fd-eMatch-

ciscocatalyst_3650-48fd-lMatch-

ciscocatalyst_3650-48fd-sMatch-

ciscocatalyst_3650-48fq-eMatch-

ciscocatalyst_3650-48fq-lMatch-

ciscocatalyst_3650-48fq-sMatch-

ciscocatalyst_3650-48fqm-eMatch-

ciscocatalyst_3650-48fqm-lMatch-

ciscocatalyst_3650-48fqm-sMatch-

ciscocatalyst_3650-48fs-eMatch-

ciscocatalyst_3650-48fs-lMatch-

ciscocatalyst_3650-48fs-sMatch-

ciscocatalyst_3650-48pd-eMatch-

ciscocatalyst_3650-48pd-lMatch-

ciscocatalyst_3650-48pd-sMatch-

ciscocatalyst_3650-48pq-eMatch-

ciscocatalyst_3650-48pq-lMatch-

ciscocatalyst_3650-48pq-sMatch-

ciscocatalyst_3650-48ps-eMatch-

ciscocatalyst_3650-48ps-lMatch-

ciscocatalyst_3650-48ps-sMatch-

ciscocatalyst_3650-48td-eMatch-

ciscocatalyst_3650-48td-lMatch-

ciscocatalyst_3650-48td-sMatch-

ciscocatalyst_3650-48tq-eMatch-

ciscocatalyst_3650-48tq-lMatch-

ciscocatalyst_3650-48tq-sMatch-

ciscocatalyst_3650-48ts-eMatch-

ciscocatalyst_3650-48ts-lMatch-

ciscocatalyst_3650-48ts-sMatch-

ciscocatalyst_3650-8x24pd-eMatch-

ciscocatalyst_3650-8x24pd-lMatch-

ciscocatalyst_3650-8x24pd-sMatch-

ciscocatalyst_3650-8x24uq-eMatch-

ciscocatalyst_3650-8x24uq-lMatch-

ciscocatalyst_3650-8x24uq-sMatch-

ciscocatalyst_3850-12s-eMatch-

ciscocatalyst_3850-12s-sMatch-

ciscocatalyst_3850-12xs-eMatch-

ciscocatalyst_3850-12xs-sMatch-

ciscocatalyst_3850-16xs-eMatch-

ciscocatalyst_3850-16xs-sMatch-

ciscocatalyst_3850-24p-eMatch-

ciscocatalyst_3850-24p-lMatch-

ciscocatalyst_3850-24pw-sMatch-

ciscocatalyst_3850-24s-eMatch-

ciscocatalyst_3850-24s-sMatch-

ciscocatalyst_3850-24t-eMatch-

ciscocatalyst_3850-24t-lMatch-

ciscocatalyst_3850-24t-sMatch-

ciscocatalyst_3850-24u-eMatch-

ciscocatalyst_3850-24u-lMatch-

ciscocatalyst_3850-24u-sMatch-

ciscocatalyst_3850-24xs-eMatch-

ciscocatalyst_3850-24xs-sMatch-

ciscocatalyst_3850-24xu-eMatch-

ciscocatalyst_3850-24xu-lMatch-

ciscocatalyst_3850-24xu-sMatch-

ciscocatalyst_3850-32xs-eMatch-

ciscocatalyst_3850-32xs-sMatch-

ciscocatalyst_3850-48f-eMatch-

ciscocatalyst_3850-48f-lMatch-

ciscocatalyst_3850-48f-sMatch-

ciscocatalyst_3850-48p-eMatch-

ciscocatalyst_3850-48p-lMatch-

ciscocatalyst_3850-48p-sMatch-

ciscocatalyst_3850-48pw-sMatch-

ciscocatalyst_3850-48t-eMatch-

ciscocatalyst_3850-48t-lMatch-

ciscocatalyst_3850-48t-sMatch-

ciscocatalyst_3850-48u-eMatch-

ciscocatalyst_3850-48u-lMatch-

ciscocatalyst_3850-48u-sMatch-

ciscocatalyst_3850-48xs-eMatch-

ciscocatalyst_3850-48xs-f-eMatch-

ciscocatalyst_3850-48xs-f-sMatch-

ciscocatalyst_3850-48xs-sMatch-

ciscocatalyst_9200Match-

ciscocatalyst_9200cxMatch-

ciscocatalyst_9200lMatch-

ciscocatalyst_9300Match-

ciscocatalyst_9300lMatch-

ciscocatalyst_9300lmMatch-

ciscocatalyst_9300xMatch-

ciscocatalyst_9400Match-

ciscocatalyst_9500Match-

ciscocatalyst_9500hMatch-

ciscocatalyst_9600Match-

ciscocatalyst_9600xMatch-

ciscocatalyst_c3850-12x48u-eMatch-

ciscocatalyst_c3850-12x48u-lMatch-

ciscocatalyst_c3850-12x48u-sMatch-

Node

ciscomeraki_ms390_firmwareMatch-

AND

ciscomeraki_ms390Match-

Node

ciscomeraki_ms210_firmwareMatch-

AND

ciscomeraki_ms210Match-

Node

ciscomeraki_ms225_firmwareMatch-

AND

ciscomeraki_ms225Match-

Node

ciscomeraki_ms250_firmwareMatch-

AND

ciscomeraki_ms250Match-

Node

ciscomeraki_ms350_firmwareMatch-

AND

ciscomeraki_ms350Match-

Node

ciscomeraki_ms355_firmwareMatch-

AND

ciscomeraki_ms355Match-

Node

ciscomeraki_ms410_firmwareMatch-

AND

ciscomeraki_ms410Match-

Node

ciscomeraki_ms420_firmwareMatch-

AND

ciscomeraki_ms420Match-

Node

ciscomeraki_ms425_firmwareMatch-

AND

ciscomeraki_ms425Match-

Node

ciscomeraki_ms450_firmwareMatch-

AND

ciscomeraki_ms450Match-

Node

cisconexus_93180yc-ex_firmwareMatch9.3\(5\)

AND

cisconexus_93180yc-exMatch-

Node

cisconexus_93180yc-fx_firmwareMatch9.3\(5\)

AND

cisconexus_93180yc-fxMatch-

Node

cisconexus_93180yc-fx3_firmwareMatch9.3\(5\)

AND

cisconexus_93180yc-fx3Match-

Node

cisconexus_93240yc-fx2_firmwareMatch9.3\(5\)

AND

cisconexus_93240yc-fx2Match-

Node

cisconexus_93360yc-fx2_firmwareMatch9.3\(5\)

AND

cisconexus_93360yc-fx2Match-

Node

cisconexus_93120tx_firmwareMatch9.3\(5\)

AND

cisconexus_93120txMatch-

Node

cisconexus_93108tc-ex_firmwareMatch9.3\(5\)

AND

cisconexus_93108tc-exMatch-

Node

cisconexus_9348gc-fxp_firmwareMatch9.3\(5\)

AND

cisconexus_9348gc-fxpMatch-

Node

cisconexus_93108tc-fx_firmwareMatch9.3\(5\)

AND

cisconexus_93108tc-fxMatch-

Node

cisconexus_93108tc-fx3p_firmwareMatch9.3\(5\)

AND

cisconexus_93108tc-fx3pMatch-

Node

cisconexus_93216tc-fx2_firmwareMatch9.3\(5\)

AND

cisconexus_93216tc-fx2Match-

Node

ciscon9k-c9316d-gx_firmwareMatch9.3\(5\)

AND

ciscon9k-c9316d-gxMatch-

Node

ciscon9k-c93600cd-gx_firmwareMatch9.3\(5\)

AND

ciscon9k-c93600cd-gxMatch-

Node

ciscon9k-c9332d-gx2b_firmwareMatch9.3\(5\)

AND

ciscon9k-c9332d-gx2bMatch-

Node

ciscon9k-c9348d-gx2a_firmwareMatch9.3\(5\)

AND

ciscon9k-c9348d-gx2aMatch-

Node

ciscon9k-c9364d-gx2a_firmwareMatch9.3\(5\)

AND

ciscon9k-c9364d-gx2aMatch-

Node

ciscon9k-x97160yc-ex_firmwareMatch9.3\(5\)

AND

ciscon9k-x97160yc-exMatch-

Node

ciscon9k-x9788tc-fx_firmwareMatch9.3\(5\)

AND

ciscon9k-x9788tc-fxMatch-

Node

ciscon9k-x9564px_firmwareMatch9.3\(5\)

AND

ciscon9k-x9564pxMatch-

Node

ciscon9k-x9464px_firmwareMatch9.3\(5\)

AND

ciscon9k-x9464pxMatch-

Node

ciscon9k-x9564tx_firmwareMatch9.3\(5\)

AND

ciscon9k-x9564txMatch-

Node

ciscon9k-x9464tx2_firmwareMatch9.3\(5\)

AND

ciscon9k-x9464tx2Match-

Node

cisconexus_9636pq_firmwareMatch9.3\(5\)

AND

cisconexus_9636pqMatch-

Node

cisconexus_x9636q-r_firmwareMatch9.3\(5\)

AND

cisconexus_x9636q-rMatch-

Node

cisconexus_9536pq_firmwareMatch9.3\(5\)

AND

cisconexus_9536pqMatch-

Node

cisconexus_9432pq_firmwareMatch9.3\(5\)

AND

cisconexus_9432pqMatch-

Node

cisconexus_9736pq_firmwareMatch9.3\(5\)

AND

cisconexus_9736pqMatch-

Node

ciscon9k-x9736c-fx_firmwareMatch9.3\(5\)

AND

ciscon9k-x9736c-fxMatch-

Node

ciscon9k-x9732c-ex_firmwareMatch9.3\(5\)

AND

ciscon9k-x9732c-exMatch-

Node

ciscon9k-x9732c-fx_firmwareMatch9.3\(5\)

AND

ciscon9k-x9732c-fxMatch-

Node

ciscon9k-x9736c-ex_firmwareMatch9.3\(5\)

AND

ciscon9k-x9736c-exMatch-

Node

ciscon9k-x9636c-rx_firmwareMatch9.3\(5\)

AND

ciscon9k-x9636c-rxMatch-

Node

ciscon9k-x9636c-r_firmwareMatch9.3\(5\)

AND

ciscon9k-x9636c-rMatch-

Node

ciscon9k-x9432c-s_firmwareMatch9.3\(5\)

AND

ciscon9k-x9432c-sMatch-

Node

cisconexus_9716d-gx_firmwareMatch9.3\(5\)

AND

cisconexus_9716d-gxMatch-

Node

cisconexus_9504_firmwareMatch9.3\(5\)

AND

cisconexus_9504Match-

Node

cisconexus_9508_firmwareMatch9.3\(5\)

AND

cisconexus_9508Match-

Node

cisconexus_9516_firmwareMatch9.3\(5\)

AND

cisconexus_9516Match-

Node

cisconexus_92160yc-x_firmwareMatch9.3\(5\)

AND

cisconexus_92160yc-xMatch-

Node

cisconexus_9272q_firmwareMatch9.3\(5\)

AND

cisconexus_9272qMatch-

Node

cisconexus_92304qc_firmwareMatch9.3\(5\)

AND

cisconexus_92304qcMatch-

Node

cisconexus_9236c_firmwareMatch9.3\(5\)

AND

cisconexus_9236cMatch-

Node

cisconexus_92300yc_firmwareMatch9.3\(5\)

AND

cisconexus_92300ycMatch-

Node

cisconexus_92348gc-x_firmwareMatch9.3\(5\)

AND

cisconexus_92348gc-xMatch-

Node

cisconexus_9364c_firmwareMatch9.3\(5\)

AND

cisconexus_9364cMatch-

Node

cisconexus_9336c-fx2_firmwareMatch9.3\(5\)

AND

cisconexus_9336c-fx2Match-

Node

cisconexus_9336c-fx2-e_firmwareMatch9.3\(5\)

AND

cisconexus_9336c-fx2-eMatch-

Node

cisconexus_9332c_firmwareMatch9.3\(5\)

AND

cisconexus_9332cMatch-

Node

cisconexus_9364c-gx_firmwareMatch9.3\(5\)

AND

cisconexus_9364c-gxMatch-

Node

cisconexus_9800_firmwareMatch9.3\(5\)

AND

cisconexus_9800Match-

Node

ciscosf500-24_firmwareMatch3.0.0.61

AND

ciscosf500-24Match-

Node

ciscosf-500-24mp_firmwareMatch3.0.0.61

AND

ciscosf-500-24mpMatch-

Node

ciscosf500-24p_firmwareMatch3.0.0.61

AND

ciscosf500-24pMatch-

Node

ciscosf500-48_firmwareMatch3.0.0.61

AND

ciscosf500-48Match-

Node

ciscosf500-48mp_firmwareMatch3.0.0.61

AND

ciscosf500-48mpMatch-

Node

ciscosf500-18p_firmwareMatch3.0.0.61

AND

ciscosf500-18pMatch-

Node

ciscosg500-28_firmwareMatch3.0.0.61

AND

ciscosg500-28Match-

Node

ciscosg500-28mpp_firmwareMatch3.0.0.61

AND

ciscosg500-28mppMatch-

Node

ciscosg500-28p_firmwareMatch3.0.0.61

AND

ciscosg500-28pMatch-

Node

ciscosg500-52_firmwareMatch3.0.0.61

AND

ciscosg500-52Match-

Node

ciscosg500-52mp_firmwareMatch3.0.0.61

AND

ciscosg500-52mpMatch-

Node

ciscosg500-52p_firmwareMatch3.0.0.61

AND

ciscosg500-52pMatch-

Node

ciscosg500x-24_firmwareMatch3.0.0.61

AND

ciscosg500x-24Match-

Node

ciscosg500x-24mpp_firmwareMatch3.0.0.61

AND

ciscosg500x-24mppMatch-

Node

ciscosg500x-24p_firmwareMatch3.0.0.61

AND

ciscosg500x-24pMatch-

Node

ciscosg500x-48_firmwareMatch3.0.0.61

AND

ciscosg500x-48Match-

Node

ciscosg500x-48mpp_firmwareMatch3.0.0.61

AND

ciscosg500x-48mppMatch-

Node

ciscosg500x-48p_firmwareMatch3.0.0.61

AND

ciscosg500x-48pMatch-

References

blog.champtar.fr/VLAN0_LLC_SNAP/

datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08/

kb.cert.org/vuls/id/855201

standards.ieee.org/ieee/802.1Q/10323/

standards.ieee.org/ieee/802.2/1048/

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-VU855201-J3z8CKTX

4.7 Medium

CVSS3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

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

0.001 Low

EPSS

Percentile

26.4%

JSON

Related for NVD:CVE-2021-27853

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