CVE-2017-9445

Description

In systemd through 233, certain sizes passed to dns_packet_new in systemd-resolved can cause it to allocate a buffer that's too small. A malicious DNS server can exploit this via a response with a specially crafted TCP payload to trick systemd-resolved into allocating a buffer that's too small, and subsequently write arbitrary data beyond the end of it.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 4.71% Top 15%
Third-Party Advisory openwall.com Third-Party Advisory securityfocus.com Third-Party Advisory securitytracker.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://launchpad.net/bugs/1695546 broken link
http://www.securitytracker.com/id/1038806 vdb entry third party advisory
http://www.securityfocus.com/bid/99302 vdb entry third party advisory
http://openwall.com/lists/oss-security/2017/06/27/8 mailing list third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2017-9445?
CVE-2017-9445 has been scored as a high severity vulnerability.
How to fix CVE-2017-9445?
To fix CVE-2017-9445, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-9445 being actively exploited in the wild?
It is possible that CVE-2017-9445 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~5% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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