Bug 1507515 (CVE-2017-15908) - CVE-2017-15908 systemd: Infinite loop in the dns_packet_read_type_window() function
Summary: CVE-2017-15908 systemd: Infinite loop in the dns_packet_read_type_window() fu...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2017-15908
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-10-30 13:26 UTC by Andrej Nemec
Modified: 2021-02-17 01:19 UTC (History)
8 users (show)

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Last Closed: 2017-10-30 13:28:50 UTC
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Description Andrej Nemec 2017-10-30 13:26:40 UTC 
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 13:28:57 UTC 
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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