Vulnerability Details : CVE-2019-7307
Potential exploit
Apport before versions 2.14.1-0ubuntu3.29+esm1, 2.20.1-0ubuntu2.19, 2.20.9-0ubuntu7.7, 2.20.10-0ubuntu27.1, 2.20.11-0ubuntu5 contained a TOCTTOU vulnerability when reading the users ~/.apport-ignore.xml file, which allows a local attacker to replace this file with a symlink to any other file on the system and so cause Apport to include the contents of this other file in the resulting crash report. The crash report could then be read by that user either by causing it to be uploaded and reported to Launchpad, or by leveraging some other vulnerability to read the resulting crash report, and so allow the user to read arbitrary files on the system.
Products affected by CVE-2019-7307
- cpe:2.3:a:apport_project:apport:2.14.1:*:*:*:*:*:*:*
- cpe:2.3:a:apport_project:apport:2.20.9:*:*:*:*:*:*:*
- cpe:2.3:a:apport_project:apport:2.20.1:*:*:*:*:*:*:*
- cpe:2.3:a:apport_project:apport:2.20.10:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-7307
0.03%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-7307
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.4
|
MEDIUM | AV:L/AC:M/Au:N/C:P/I:P/A:P |
3.4
|
6.4
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
2.0
|
4.0
|
Canonical Ltd. | |
|
7.0
|
HIGH | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.0
|
5.9
|
NIST |
CWE ids for CVE-2019-7307
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The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state.Assigned by:
- nvd@nist.gov (Primary)
- security@ubuntu.com (Secondary)
References for CVE-2019-7307
-
http://packetstormsecurity.com/files/172858/Ubuntu-Apport-Whoopsie-DoS-Integer-Overflow.html
Ubuntu Apport / Whoopsie DoS / Integer Overflow ≈ Packet Storm
-
https://bugs.launchpad.net/ubuntu/%2Bsource/apport/%2Bbug/1830858
Bug #1830858 “TOCTOU vulnerability in _get_ignore_dom (report.py...” : Bugs : apport package : UbuntuExploit;Issue Tracking;Vendor Advisory
-
https://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-7307.html
CVE-2019-7307 in UbuntuVendor Advisory
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