Vulnerability Details : CVE-2016-7795
Potential exploit
The manager_invoke_notify_message function in systemd 231 and earlier allows local users to cause a denial of service (assertion failure and PID 1 hang) via a zero-length message received over a notify socket.
Vulnerability category: Denial of service
Products affected by CVE-2016-7795
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
- cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2016-7795
0.15%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 32 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2016-7795
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.9
|
MEDIUM | AV:L/AC:L/Au:N/C:N/I:N/A:C |
3.9
|
6.9
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2016-7795
-
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.Assigned by: nvd@nist.gov (Primary)
References for CVE-2016-7795
-
http://www.ubuntu.com/usn/USN-3094-1
USN-3094-1: Systemd vulnerability | Ubuntu security noticesThird Party Advisory
-
http://rhn.redhat.com/errata/RHSA-2016-2694.html
RHSA-2016:2694 - Security Advisory - Red Hat Customer Portal
-
http://www.securityfocus.com/bid/93223
systemd 'manager_invoke_notify_message()' Function Local Denial of Service VulnerabilityThird Party Advisory;VDB Entry
-
https://www.agwa.name/blog/post/how_to_crash_systemd_in_one_tweet
How to Crash Systemd in One TweetExploit;Technical Description;Third Party Advisory
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http://www.securitytracker.com/id/1037320
systemd Zero-Length Notification Processing Flaw Lets Local Users Cause Denial of Service Conditions - SecurityTracker
-
https://github.com/systemd/systemd/issues/4234
Assertion failure when PID 1 receives a zero-length message over notify socket · Issue #4234 · systemd/systemd · GitHubExploit;Patch;Third Party Advisory
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http://www.openwall.com/lists/oss-security/2016/09/28/9
oss-security - CVE Request: systemd v209+: local denial-of-service attackThird Party Advisory
-
http://www.openwall.com/lists/oss-security/2016/09/30/1
oss-security - Re: CVE Request: systemd v209+: local denial-of-service attackThird Party Advisory
-
http://rhn.redhat.com/errata/RHSA-2016-2610.html
RHSA-2016:2610 - Security Advisory - Red Hat Customer Portal
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