A bug in the error handling of the send file code for the NIO HTTP connector in Apache Tomcat 9.0.0.M1 to 9.0.0.M13, 8.5.0 to 8.5.8, 8.0.0.RC1 to 8.0.39, 7.0.0 to 7.0.73 and 6.0.16 to 6.0.48 resulted in the current Processor object being added to the Processor cache multiple times. This in turn meant that the same Processor could be used for concurrent requests. Sharing a Processor can result in information leakage between requests including, not not limited to, session ID and the response body. The bug was first noticed in 8.5.x onwards where it appears the refactoring of the Connector code for 8.5.x onwards made it more likely that the bug was observed. Initially it was thought that the 8.5.x refactoring introduced the bug but further investigation has shown that the bug is present in all currently supported Tomcat versions.
2017-08-10T22:29:00.267
2025-04-20T01:37:25.860
Deferred
CVSSv3.0: 7.5 (HIGH)
AV:N/AC:L/Au:N/C:P/I:N/A:N
10.0
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | apache | tomcat | 7.0.0 | Yes |
| Application | apache | tomcat | 7.0.1 | Yes |
| Application | apache | tomcat | 7.0.2 | Yes |
| Application | apache | tomcat | 7.0.3 | Yes |
| Application | apache | tomcat | 7.0.4 | Yes |
| Application | apache | tomcat | 7.0.5 | Yes |
| Application | apache | tomcat | 7.0.6 | Yes |
| Application | apache | tomcat | 7.0.7 | Yes |
| Application | apache | tomcat | 7.0.8 | Yes |
| Application | apache | tomcat | 7.0.9 | Yes |
| Application | apache | tomcat | 7.0.11 | Yes |
| Application | apache | tomcat | 7.0.12 | Yes |
| Application | apache | tomcat | 7.0.13 | Yes |
| Application | apache | tomcat | 7.0.14 | Yes |
| Application | apache | tomcat | 7.0.15 | Yes |
| Application | apache | tomcat | 7.0.16 | Yes |
| Application | apache | tomcat | 7.0.17 | Yes |
| Application | apache | tomcat | 7.0.18 | Yes |
| Application | apache | tomcat | 7.0.19 | Yes |
| Application | apache | tomcat | 7.0.20 | Yes |
| Application | apache | tomcat | 7.0.21 | Yes |
| Application | apache | tomcat | 7.0.22 | Yes |
| Application | apache | tomcat | 7.0.23 | Yes |
| Application | apache | tomcat | 7.0.24 | Yes |
| Application | apache | tomcat | 7.0.25 | Yes |
| Application | apache | tomcat | 7.0.26 | Yes |
| Application | apache | tomcat | 7.0.27 | Yes |
| Application | apache | tomcat | 7.0.28 | Yes |
| Application | apache | tomcat | 7.0.29 | Yes |
| Application | apache | tomcat | 7.0.30 | Yes |
| Application | apache | tomcat | 7.0.31 | Yes |
| Application | apache | tomcat | 7.0.32 | Yes |
| Application | apache | tomcat | 7.0.33 | Yes |
| Application | apache | tomcat | 7.0.34 | Yes |
| Application | apache | tomcat | 7.0.35 | Yes |
| Application | apache | tomcat | 7.0.36 | Yes |
| Application | apache | tomcat | 7.0.37 | Yes |
| Application | apache | tomcat | 7.0.38 | Yes |
| Application | apache | tomcat | 7.0.39 | Yes |
| Application | apache | tomcat | 7.0.40 | Yes |
| Application | apache | tomcat | 7.0.41 | Yes |
| Application | apache | tomcat | 7.0.42 | Yes |
| Application | apache | tomcat | 7.0.43 | Yes |
| Application | apache | tomcat | 7.0.44 | Yes |
| Application | apache | tomcat | 7.0.45 | Yes |
| Application | apache | tomcat | 7.0.46 | Yes |
| Application | apache | tomcat | 7.0.47 | Yes |
| Application | apache | tomcat | 7.0.48 | Yes |
| Application | apache | tomcat | 7.0.49 | Yes |
| Application | apache | tomcat | 7.0.50 | Yes |
| Application | apache | tomcat | 7.0.52 | Yes |
| Application | apache | tomcat | 7.0.53 | Yes |
| Application | apache | tomcat | 7.0.54 | Yes |
| Application | apache | tomcat | 7.0.55 | Yes |
| Application | apache | tomcat | 7.0.56 | Yes |
| Application | apache | tomcat | 7.0.57 | Yes |
| Application | apache | tomcat | 7.0.58 | Yes |
| Application | apache | tomcat | 7.0.59 | Yes |
| Application | apache | tomcat | 7.0.60 | Yes |
| Application | apache | tomcat | 7.0.61 | Yes |
| Application | apache | tomcat | 7.0.62 | Yes |
| Application | apache | tomcat | 7.0.63 | Yes |
| Application | apache | tomcat | 7.0.64 | Yes |
| Application | apache | tomcat | 7.0.65 | Yes |
| Application | apache | tomcat | 7.0.66 | Yes |
| Application | apache | tomcat | 7.0.67 | Yes |
| Application | apache | tomcat | 7.0.68 | Yes |
| Application | apache | tomcat | 7.0.69 | Yes |
| Application | apache | tomcat | 7.0.70 | Yes |
| Application | apache | tomcat | 7.0.71 | Yes |
| Application | apache | tomcat | 7.0.72 | Yes |
| Application | apache | tomcat | 7.0.73 | Yes |
| Application | apache | tomcat | 8.0 | Yes |
| Application | apache | tomcat | 8.0.0 | Yes |
| Application | apache | tomcat | 8.0.0 | Yes |
| Application | apache | tomcat | 8.0.0 | Yes |
| Application | apache | tomcat | 8.0.0 | Yes |
| Application | apache | tomcat | 8.0.1 | Yes |
| Application | apache | tomcat | 8.0.2 | Yes |
| Application | apache | tomcat | 8.0.3 | Yes |
| Application | apache | tomcat | 8.0.4 | Yes |
| Application | apache | tomcat | 8.0.5 | Yes |
| Application | apache | tomcat | 8.0.6 | Yes |
| Application | apache | tomcat | 8.0.7 | Yes |
| Application | apache | tomcat | 8.0.8 | Yes |
| Application | apache | tomcat | 8.0.9 | Yes |
| Application | apache | tomcat | 8.0.10 | Yes |
| Application | apache | tomcat | 8.0.11 | Yes |
| Application | apache | tomcat | 8.0.12 | Yes |
| Application | apache | tomcat | 8.0.13 | Yes |
| Application | apache | tomcat | 8.0.14 | Yes |
| Application | apache | tomcat | 8.0.15 | Yes |
| Application | apache | tomcat | 8.0.16 | Yes |
| Application | apache | tomcat | 8.0.17 | Yes |
| Application | apache | tomcat | 8.0.18 | Yes |
| Application | apache | tomcat | 8.0.19 | Yes |
| Application | apache | tomcat | 8.0.20 | Yes |
| Application | apache | tomcat | 8.0.21 | Yes |
| Application | apache | tomcat | 8.0.22 | Yes |
| Application | apache | tomcat | 8.0.23 | Yes |
| Application | apache | tomcat | 8.0.24 | Yes |
| Application | apache | tomcat | 8.0.25 | Yes |
| Application | apache | tomcat | 8.0.26 | Yes |
| Application | apache | tomcat | 8.0.27 | Yes |
| Application | apache | tomcat | 8.0.28 | Yes |
| Application | apache | tomcat | 8.0.29 | Yes |
| Application | apache | tomcat | 8.0.30 | Yes |
| Application | apache | tomcat | 8.0.31 | Yes |
| Application | apache | tomcat | 8.0.32 | Yes |
| Application | apache | tomcat | 8.0.33 | Yes |
| Application | apache | tomcat | 8.0.34 | Yes |
| Application | apache | tomcat | 8.0.35 | Yes |
| Application | apache | tomcat | 8.0.36 | Yes |
| Application | apache | tomcat | 8.0.37 | Yes |
| Application | apache | tomcat | 8.0.38 | Yes |
| Application | apache | tomcat | 8.0.39 | Yes |
| Application | apache | tomcat | 8.5.0 | Yes |
| Application | apache | tomcat | 8.5.1 | Yes |
| Application | apache | tomcat | 8.5.2 | Yes |
| Application | apache | tomcat | 8.5.3 | Yes |
| Application | apache | tomcat | 8.5.4 | Yes |
| Application | apache | tomcat | 8.5.5 | Yes |
| Application | apache | tomcat | 8.5.6 | Yes |
| Application | apache | tomcat | 8.5.7 | Yes |
| Application | apache | tomcat | 8.5.8 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |