Vulnerability Monitor

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CVE-2017-9445

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.

Published

2017-06-28T06:29:00.190

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-787

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	systemd_project	systemd	≤ 233	Yes

References

http://openwall.com/lists/oss-security/2017/06/27/8 Mailing List, Patch, Third Party Advisory ([email protected])
http://www.securityfocus.com/bid/99302 Third Party Advisory, VDB Entry ([email protected])
http://www.securitytracker.com/id/1038806 Third Party Advisory, VDB Entry ([email protected])
https://launchpad.net/bugs/1695546 Broken Link ([email protected])
http://openwall.com/lists/oss-security/2017/06/27/8 Mailing List, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/99302 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1038806 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://launchpad.net/bugs/1695546 Broken Link (af854a3a-2127-422b-91ae-364da2661108)