Vulnerability CVE-2016-8745


Published: 2017-08-10   Modified: 2017-11-03

Description:
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.

Vendor: Apache
Product: Tomcat 
Version:
9.0.0
8.5.8
8.5.7
8.5.6
8.5.5
8.5.4
8.5.3
8.5.2
8.5.1
8.5.0
8.0.9
8.0.8
8.0.7
8.0.6
8.0.5
8.0.4
8.0.39
8.0.38
8.0.37
8.0.36
8.0.35
8.0.34
8.0.33
8.0.32
8.0.31
8.0.30
8.0.3
8.0.29
8.0.28
8.0.27
8.0.26
8.0.25
8.0.24
8.0.23
8.0.22
8.0.21
8.0.20
8.0.2
8.0.19
8.0.18
8.0.17
8.0.16
8.0.15
8.0.14
8.0.13
8.0.12
8.0.11
8.0.10
8.0.1
8.0.0
8.0
7.0.9
7.0.8
7.0.73
7.0.72
7.0.71
7.0.70
7.0.7
7.0.69
7.0.68
7.0.67
7.0.66
7.0.65
7.0.64
7.0.63
7.0.62
7.0.61
7.0.60
7.0.6
7.0.59
7.0.58
7.0.57
7.0.56
7.0.55
7.0.54
7.0.53
7.0.52
7.0.50
7.0.5
7.0.49
7.0.48
7.0.47
7.0.46
7.0.45
7.0.44
7.0.43
7.0.42
7.0.41
7.0.40
7.0.4
7.0.39
7.0.38
7.0.37
7.0.36
7.0.35
7.0.34
7.0.33
7.0.32
7.0.31
7.0.30
See more versions on NVD

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None

 References:
http://www.debian.org/security/2017/dsa-3754
http://www.debian.org/security/2017/dsa-3755
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
http://www.securityfocus.com/bid/94828
http://www.securitytracker.com/id/1037432
https://lists.apache.org/thread.html/4113c05d37f37c12b8033205684f04033c5f7a9bae117d4af23b32b4@%3Cannounce.tomcat.apache.org%3E
https://security.gentoo.org/glsa/201705-09

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