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Bug 1357803 - (CVE-2016-2775) CVE-2016-2775 bind: Too long query name causes segmentation fault in lwresd
CVE-2016-2775 bind: Too long query name causes segmentation fault in lwresd
Status: ASSIGNED
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20160718,repor...
: Security
Depends On: 1306504 1349329 1349331 1357804 1357805 1482441 1482442
Blocks: 1357806
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Reported: 2016-07-19 04:24 EDT by Adam Mariš
Modified: 2018-03-29 18:00 EDT (History)
10 users (show)

See Also:
Fixed In Version: bind 9.9.9-P2, bind 9.10.4-P2, bind 9.11.0b2, bind 9.9.9-S3
Doc Type: If docs needed, set a value
Doc Text:
It was found that the lightweight resolver protocol implementation in BIND could enter an infinite recursion and crash when asked to resolve a query name which, when combined with a search list entry, exceeds the maximum allowable length. A remote attacker could use this flaw to crash lwresd or named when using the "lwres" statement in named.conf.
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RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:2533 normal SHIPPED_LIVE Moderate: bind security update 2017-08-24 05:24:22 EDT

  None (edit)
Description Adam Mariš 2016-07-19 04:24:10 EDT 
It was found that if the lightweight resolver is asked to resolve a query name which, when combined with a search list entry, exceeds the maximum allowable length, the server can terminate due to an error. If configured to use lwres lightweight resolver protocol accepting remote client connections, remote attacker can cause DoS by submitting large query.

External Reference:

https://kb.isc.org/article/AA-01393/
Comment 1 Adam Mariš 2016-07-19 04:24:47 EDT 
Created bind tracking bugs for this issue:

Affects: fedora-all [bug 1357804]
Comment 2 Adam Mariš 2016-07-19 04:24:54 EDT 
Created bind99 tracking bugs for this issue:

Affects: fedora-all [bug 1357805]
Comment 6 Fedora Update System 2016-07-30 14:23:13 EDT 
bind99-9.9.9-1.P2.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
Comment 7 Fedora Update System 2016-07-30 14:23:29 EDT 
bind-9.10.4-1.P2.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
Comment 8 Fedora Update System 2016-08-08 19:55:19 EDT 
bind99-9.9.9-1.P2.fc23, dhcp-4.3.3-10.P1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
Comment 11 Fedora Update System 2016-08-17 20:51:14 EDT 
bind-9.10.4-1.P2.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
Comment 14 Dhiru Kholia 2017-08-08 04:14:00 EDT 
This flaw in BIND was fixed for RHEL 6.9 in RHBA-2017:0651.

https://access.redhat.com/errata/RHBA-2017:0651
Comment 17 errata-xmlrpc 2017-08-24 01:25:03 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.3 Extended Update Support
  Red Hat Enterprise Linux 7.2 Extended Update Support

Via RHSA-2017:2533 https://access.redhat.com/errata/RHSA-2017:2533
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