CVE-2022-42953

published 2022-12-25

CVE-2022-42953: Certain ZKTeco products (ZEM500-510-560-760, ZEM600-800, ZEM720, ZMM) allow access to sensitive information via direct requests for the form/DataApp?style=1…

Priority P2 77 high 7.5 CVSS 3.1

AV N AC L PR N UI N S U C H I N A N

ITW EXPLOIT VulnCheck KEV

Certain ZKTeco products (ZEM500-510-560-760, ZEM600-800, ZEM720, ZMM) allow access to sensitive information via direct requests for the form/DataApp?style=1 and form/DataApp?style=0 URLs. The affected versions may be before 8.88 (ZEM500-510-560-760, ZEM600-800, ZEM720) and 15.00 (ZMM200-220-210). The fixed versions are firmware version 8.88 (ZEM500-510-560-760, ZEM600-800, ZEM720) and firmware version 15.00 (ZMM200-220-210).

Affected

10 ranges

Vendor	Product	Version range	Fixed in
zkteco	zem500_firmware	< 8.88	8.88
zkteco	zem510_firmware	< 8.88	8.88
zkteco	zem560_firmware	< 8.88	8.88
zkteco	zem600_firmware	< 8.88	8.88
zkteco	zem720_firmware	< 8.88	8.88
zkteco	zem760_firmware	< 8.88	8.88
zkteco	zem800_firmware	< 8.88	8.88
zkteco	zmm200_firmware	< 15.00	15.00
zkteco	zmm210_firmware	< 15.00	15.00
zkteco	zmm220_firmware	< 15.00	15.00

Detection & IOCs extracted from sources · hover to see the quote

url http://192.0.2.1/form/DataApp?style=1↗

url http://192.0.2.1/form/DataApp?style=0↗

url http://192.0.2.1/csl/user?did=0&uid=123↗

path /form/DataApp↗

path /csl/user↗

cookie SessionID=1624553126↗

filename device.dat↗

filename data.dat↗

path mnt/mtdblock/ssruser.dat↗

path mnt/mtdblock/templatev10.dat↗

• → Detect unauthenticated GET requests to /form/DataApp with style=1 or style=0 parameters, which trigger backup file downloads without any authentication. ↗
• → The SessionID cookie value is approximately the Unix epoch timestamp at time of access; monitor for requests where SessionID is absent or where the cookie value is predictable/guessable (epoch-based). ↗
• → Monitor for unauthenticated access to /csl/user endpoint with did and uid parameters, which exposes individual user detail records. ↗
• → Alert on HTTP responses serving files named device.dat or data.dat from ZKTeco devices, as these are compressed tar archives containing sensitive employee credentials and fingerprint data. ↗

• · The exploit PoC uses a placeholder IP (192.0.2.1); in real deployments the device IP will differ. Detection rules should match on the URL paths /form/DataApp and /csl/user rather than a specific host IP. ↗
• · Affected firmware versions are potentially below 8.88 for ZEM500-510-560-760/ZEM600-800/ZEM720 and below 15.00 for ZMM200-220-210; fixed versions are 8.88 and 15.00 respectively. ↗

CVSS provenance

nvd v3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

vulncheck 7.5 HIGH

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