Description
Fastjson before 1.2.48 mishandles autoType because, when an @type key is in a JSON document, and the value of that key is the name of a Java class, there may be calls to certain public methods of that class. Depending on the behavior of those methods, there may be JNDI injection with an attacker-supplied payload located elsewhere in that JSON document. This was exploited in the wild in 2023 through 2025. NOTE: this issue exists because of an incomplete fix for CVE-2017-18349. Also, a later bypass is covered by CVE-2022-25845.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Alibaba | Fastjson | < 1.2.48 | 1.2.48 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | com.alibaba:fastjson | < 1.2.48 | 1.2.48 | GHSA-jm7w-5684-pvh8 |
References
- https://github.com/alibaba/fastjson/compare/1.2.47...1.2.48
- https://www.seebug.org/vuldb/ssvid-98020
- https://www.cnvd.org.cn/flaw/show/CNVD-2019-22238
- https://www.freebuf.com/vuls/208339.html
- https://github.com/vulhub/vulhub/tree/master/fastjson/1.2.47-rce
- https://www.cloudsek.com/blog/androxgh0st-continues-exploitation-operators-compromise-a-us-university-for-hosting-c2-logger
- https://cert.360.cn/warning/detail?id=7240aeab581c6dc2c9c5350756079955