CVE-2016-8745

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    CVE-2016-8745

    Published: 10 Aug 2017Last Modified: 8 Jul 2026

    Summary:

    Details: 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.

    References: https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3E, https://lists.apache.org/thread.html/37220405a377c0182d2afdbc36461c4783b2930fbeae3a17f1333113%40%3Cdev.tomcat.apache.org%3E, https://lists.apache.org/thread.html/388a323769f1dff84c9ec905455aa73fbcb20338e3c7eb131457f708%40%3Cdev.tomcat.apache.org%3E, https://lists.apache.org/thread.html/39ae1f0bd5867c15755a6f959b271ade1aea04ccdc3b2e639dcd903b%40%3Cdev.tomcat.apache.org%3E, https://lists.apache.org/thread.html/3d19773b4cf0377db62d1e9328bf9160bf1819f04f988315086931d7%40%3Cdev.tomcat.apache.org%3E, https://lists.apache.org/thread.html/4113c05d37f37c12b8033205684f04033c5f7a9bae117d4af23b32b4%40%3Cannounce.tomcat.apache.org%3E, https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3%40%3Cdev.tomcat.apache.org%3E, https://lists.apache.org/thread.html/845312a10aabbe2c499fca94003881d2c79fc993d85f34c1f5c77424%40%3Cdev.tomcat.apache.org%3E, https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org%3E, https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org%3E, https://lists.apache.org/thread.html/b84ad1258a89de5c9c853c7f2d3ad77e5b8b2930be9e132d5cef6b95%40%3Cdev.tomcat.apache.org%3E, https://lists.apache.org/thread.html/b8a1bf18155b552dcf9a928ba808cbadad84c236d85eab3033662cfb%40%3Cdev.tomcat.apache.org%3E, https://lists.apache.org/thread.html/r03c597a64de790ba42c167efacfa23300c3d6c9fe589ab87fe02859c%40%3Cdev.tomcat.apache.org%3E, https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d%40%3Cdev.tomcat.apache.org%3E, https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0%40%3Cdev.tomcat.apache.org%3E, https://lists.apache.org/thread.html/r587e50b86c1a96ee301f751d50294072d142fd6dc08a8987ae9f3a9b%40%3Cdev.tomcat.apache.org%3E, https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c%40%3Cdev.tomcat.apache.org%3E, http://rhn.redhat.com/errata/RHSA-2017-0457.html, http://rhn.redhat.com/errata/RHSA-2017-0527.html, http://www.debian.org/security/2017/dsa-3754, http://www.debian.org/security/2017/dsa-3755, http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html, http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html, http://www.securityfocus.com/bid/94828, http://www.securitytracker.com/id/1037432, https://access.redhat.com/errata/RHSA-2017:0455, https://access.redhat.com/errata/RHSA-2017:0456, https://access.redhat.com/errata/RHSA-2017:0935, https://security.gentoo.org/glsa/201705-09, https://security.netapp.com/advisory/ntap-20180607-0002/

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- e498667bd7811e846771a852b16ce9f1e524b81b
    Fixed -None

    Affected versions

    7.0.0
    7.0.1
    7.0.11
    7.0.12
    7.0.13
    7.0.14
    7.0.15
    7.0.16
    7.0.17
    7.0.18
    7.0.19
    7.0.2
    7.0.20
    7.0.21
    7.0.22
    7.0.23
    7.0.24
    7.0.25
    7.0.26
    7.0.27
    7.0.28
    7.0.29
    7.0.3
    7.0.30
    7.0.31
    7.0.32
    7.0.33
    7.0.34
    7.0.35
    7.0.36
    7.0.37
    7.0.38
    7.0.39
    7.0.4
    7.0.40
    7.0.41
    7.0.42
    7.0.43
    7.0.44
    7.0.45
    7.0.46
    7.0.47
    7.0.48
    7.0.49
    7.0.5
    7.0.50
    7.0.52
    7.0.53
    7.0.54
    7.0.55
    7.0.56
    7.0.57
    7.0.58
    7.0.59
    7.0.6
    7.0.60
    7.0.61
    7.0.62
    7.0.63
    7.0.64
    7.0.65
    7.0.66
    7.0.67
    7.0.68
    7.0.69
    7.0.7
    7.0.70
    7.0.71
    7.0.72
    7.0.73
    7.0.8
    7.0.9

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2016-8745 | CVE-DB