Vulnerability Details : CVE-2019-20477
Potential exploit
PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.
Products affected by CVE-2019-20477
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
- cpe:2.3:a:pyyaml:pyyaml:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-20477
0.80%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 73 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-20477
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST | |
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2019-20477
-
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-20477
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/52N5XS73Z5S4ZN7I7R56ICCPCTKCUV4H/
[SECURITY] Fedora 31 Update: PyYAML-5.3-2.fc31 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://github.com/yaml/pyyaml/blob/master/CHANGES
pyyaml/CHANGES at master · yaml/pyyaml · GitHubRelease Notes;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/33VBUY73AA6CTTYL3LRWHNFDULV7PFPN/
[SECURITY] Fedora 30 Update: PyYAML-5.3-2.fc30 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://www.exploit-db.com/download/47655
Exploit;Third Party Advisory;VDB Entry
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