Sign-up

ID

VAR-202104-1032


CVE

CVE-2021-27246


TITLE

TP-Link AC1750 sync-server Stack-based Buffer Overflow Remote Code Execution Vulnerability

Trust: 0.7

sources: ZDI: ZDI-21-215

DESCRIPTION

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link Archer A7 AC1750 1.0.15 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of MAC addresses by the tdpServer endpoint. A crafted TCP message can write stack pointers to the stack. An attacker can leverage this vulnerability to execute code in the context of the root user. Was ZDI-CAN-12306

Trust: 1.62

sources: NVD: CVE-2021-27246 // ZDI: ZDI-21-215 // VULMON: CVE-2021-27246

AFFECTED PRODUCTS

vendor:tp linkmodel:ac1750scope:eqversion:1.0.15

Trust: 1.0

vendor:tp linkmodel:ac1750scope: - version: -

Trust: 0.7

sources: ZDI: ZDI-21-215 // NVD: CVE-2021-27246

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov: CVE-2021-27246
value: HIGH

Trust: 1.0

zdi-disclosures@trendmicro.com: CVE-2021-27246
value: HIGH

Trust: 1.0

ZDI: CVE-2021-27246
value: HIGH

Trust: 0.7

CNNVD: CNNVD-202104-1075
value: HIGH

Trust: 0.6

VULMON: CVE-2021-27246
value: HIGH

Trust: 0.1

nvd@nist.gov: CVE-2021-27246
severity: HIGH
baseScore: 7.9
vectorString: AV:A/AC:M/AU:N/C:C/I:C/A:C
accessVector: ADJACENT_NETWORK
accessComplexity: MEDIUM
authentication: NONE
confidentialityImpact: COMPLETE
integrityImpact: COMPLETE
availabilityImpact: COMPLETE
exploitabilityScore: 5.5
impactScore: 10.0
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 1.1

nvd@nist.gov: CVE-2021-27246
baseSeverity: HIGH
baseScore: 8.0
vectorString: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
attackVector: ADJACENT
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: REQUIRED
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
availabilityImpact: HIGH
exploitabilityScore: 2.1
impactScore: 5.9
version: 3.1

Trust: 1.0

zdi-disclosures@trendmicro.com: CVE-2021-27246
baseSeverity: HIGH
baseScore: 8.0
vectorString: CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
attackVector: ADJACENT
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: REQUIRED
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
availabilityImpact: HIGH
exploitabilityScore: 2.1
impactScore: 5.9
version: 3.0

Trust: 1.0

ZDI: CVE-2021-27246
baseSeverity: HIGH
baseScore: 8.0
vectorString: AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
attackVector: ADJACENT
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: REQUIRED
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
availabilityImpact: HIGH
exploitabilityScore: 2.1
impactScore: 5.9
version: 3.0

Trust: 0.7

sources: ZDI: ZDI-21-215 // VULMON: CVE-2021-27246 // CNNVD: CNNVD-202104-1075 // NVD: CVE-2021-27246 // NVD: CVE-2021-27246

PROBLEMTYPE DATA

problemtype:CWE-121

Trust: 1.0

sources: NVD: CVE-2021-27246

THREAT TYPE

remote or local

Trust: 0.6

sources: CNNVD: CNNVD-202104-1075

TYPE

other

Trust: 0.6

sources: CNNVD: CNNVD-202104-1075

PATCH

title:TP-Link Archer A7 AC1750 Security vulnerabilitiesurl:http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=147457

Trust: 0.6

title:CVE-2021-27246_Pwn2Own2020url:https://github.com/synacktiv/CVE-2021-27246_Pwn2Own2020

Trust: 0.1

title:PoC-in-GitHuburl:https://github.com/developer3000S/PoC-in-GitHub

Trust: 0.1

sources: VULMON: CVE-2021-27246 // CNNVD: CNNVD-202104-1075

EXTERNAL IDS

db:NVDid:CVE-2021-27246

Trust: 2.4

db:ZDIid:ZDI-21-215

Trust: 2.4

db:ZDI_CANid:ZDI-CAN-12306

Trust: 0.7

db:CNNVDid:CNNVD-202104-1075

Trust: 0.6

db:VULMONid:CVE-2021-27246

Trust: 0.1

sources: ZDI: ZDI-21-215 // VULMON: CVE-2021-27246 // CNNVD: CNNVD-202104-1075 // NVD: CVE-2021-27246

REFERENCES

url:https://www.zerodayinitiative.com/advisories/zdi-21-215/

Trust: 1.8

url:https://nvd.nist.gov/vuln/detail/cve-2021-27246

Trust: 0.6

url:https://cwe.mitre.org/data/definitions/121.html

Trust: 0.1

url:https://github.com/synacktiv/cve-2021-27246_pwn2own2020

Trust: 0.1

url:https://nvd.nist.gov

Trust: 0.1

sources: VULMON: CVE-2021-27246 // CNNVD: CNNVD-202104-1075 // NVD: CVE-2021-27246

CREDITS

@0xMitsurugi (Synacktiv), @swapgs (Synacktiv)

Trust: 0.7

sources: ZDI: ZDI-21-215

SOURCES

db:ZDIid:ZDI-21-215
db:VULMONid:CVE-2021-27246
db:CNNVDid:CNNVD-202104-1075
db:NVDid:CVE-2021-27246

LAST UPDATE DATE

2024-11-23T23:11:06.062000+00:00


SOURCES UPDATE DATE

db:ZDIid:ZDI-21-215date:2021-03-19T00:00:00
db:VULMONid:CVE-2021-27246date:2021-04-22T00:00:00
db:CNNVDid:CNNVD-202104-1075date:2021-04-23T00:00:00
db:NVDid:CVE-2021-27246date:2024-11-21T05:57:40.697

SOURCES RELEASE DATE

db:ZDIid:ZDI-21-215date:2021-02-24T00:00:00
db:VULMONid:CVE-2021-27246date:2021-04-14T00:00:00
db:CNNVDid:CNNVD-202104-1075date:2021-04-14T00:00:00
db:NVDid:CVE-2021-27246date:2021-04-14T16:15:13.127