CVE-2020-9483

published 2020-06-30

CVE-2020-9483: **Resolved** When use H2/MySQL/TiDB as Apache SkyWalking storage, the metadata query through GraphQL protocol, there is a SQL injection vulnerability, which…

Priority P2 66 high 7.5 CVSS 3.1

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

EXPLOIT

**Resolved** When use H2/MySQL/TiDB as Apache SkyWalking storage, the metadata query through GraphQL protocol, there is a SQL injection vulnerability, which allows to access unpexcted data. Apache SkyWalking 6.0.0 to 6.6.0, 7.0.0 H2/MySQL/TiDB storage implementations don't use the appropriate way to set SQL parameters.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
apache	skywalking	—	—
apache	skywalking	6.0.0 – 6.6.0	—

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

url /graphql↗

command ') UNION SELECT 1,CONCAT('~','9999999999','~')-- ↗

other POST /graphql with body: {"query":"query SQLi($d: Duration!){globalP99:getLinearIntValues(metric: {name:\"all_p99\",id:\"') UNION SELECT 1,CONCAT('~','9999999999','~')-- \",}, duration: $d){values{value}}}","variables":{"d":{"start":"2021-11-11","end":"2021-11-12","step":"DAY"}}}↗

• → Exploit targets HTTP POST to /graphql endpoint with a GraphQL query containing a UNION-based SQL injection payload in the 'id' field of the metric parameter. ↗
• → Successful exploitation is indicated by the response body containing the injected UNION SELECT string or the error string 'Exception while fetching data', with HTTP 200 status and Content-Type: application/json. ↗
• → The vulnerability is exploited via the GraphQL protocol against Apache SkyWalking instances using H2, MySQL, or TiDB as storage backends (versions 6.0.0–6.6.0 and 7.0.0). ↗
• → GreyNoise observed IPs actively attempting to exploit CVE-2020-9483 (Apache SkyWalking GraphQL SQL Injection) with malicious intent; monitor for such IPs in network logs. ↗

• · The SQL injection payload uses the 'all_p99' metric name and a UNION SELECT in the 'id' field; other metric names may also be injectable but this is the confirmed PoC payload. ↗
• · The vulnerability only affects deployments using H2, MySQL, or TiDB storage backends; other storage backends are not impacted. ↗

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

nvd v2.0 5.0 MEDIUM AV:N/AC:L/Au:N/C:P/I:N/A:N

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