Vulnerability Details : 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.
Vulnerability category: Memory Corruption
Products affected by CVE-2017-9445
- cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2017-9445
31.13%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 97 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2017-9445
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2017-9445
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-9445
-
http://openwall.com/lists/oss-security/2017/06/27/8
oss-security - CVE-2017-9445: Out-of-bounds write in systemd-resolved with crafted TCP payloadMailing List;Patch;Third Party Advisory
-
http://www.securitytracker.com/id/1038806
systemd resolved Buffer Overflow in dns_packet_new() Lets Remote Users Execute Arbitrary Code - SecurityTrackerThird Party Advisory;VDB Entry
-
http://www.securityfocus.com/bid/99302
systemd CVE-2017-9445 Out-Of-Bounds Write Remote Code Execution VulnerabilityThird Party Advisory;VDB Entry
-
https://launchpad.net/bugs/1695546
Bug #1695546 “Out of bounds write in resolved with crafted TCP r...” : Bugs : systemd package : UbuntuBroken Link
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