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Bug 1507515 - (CVE-2017-15908) CVE-2017-15908 systemd: Infinite loop in the dns_packet_read_type_window() function
CVE-2017-15908 systemd: Infinite loop in the dns_packet_read_type_window() fu...
Status: CLOSED NOTABUG
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=20171026,repor...
: Security
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Reported: 2017-10-30 09:26 EDT by Andrej Nemec
Modified: 2018-02-12 03:57 EST (History)
8 users (show)

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Last Closed: 2017-10-30 09:28:50 EDT
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Description Andrej Nemec 2017-10-30 09:26:40 EDT 
In systemd 223 through 235, a remote DNS server can respond with a custom crafted DNS NSEC resource record to trigger an infinite loop in the dns_packet_read_type_window() function of the 'systemd-resolved' service and cause a DoS of the affected service.

References:

https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1725351

Upstream pull request:

https://github.com/systemd/systemd/pull/7184

Upstream patch:

https://github.com/systemd/systemd/commit/8aeadf3052a2130b88d5bccf5439890e1034f28d
Comment 1 Andrej Nemec 2017-10-30 09:28:57 EDT 
Statement:

This issue did not affect the versions of systemd as shipped with Red Hat Enterprise Linux 7 as they did not include the vulnerable code.
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