Vulnerability Details : CVE-2020-1747
A vulnerability was discovered in the PyYAML library in versions before 5.3.1, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_load method or with the FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this flaw. An attacker could use this flaw to execute arbitrary code on the system by abusing the python/object/new constructor.
Vulnerability category: Input validationExecute code
Products affected by CVE-2020-1747
- Oracle » Communications Cloud Native Core Network Function Cloud Native Environment » Version: 22.1.0cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:22.1.0:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
- cpe:2.3:a:pyyaml:pyyaml:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-1747
0.54%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 77 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-1747
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
10.0
|
HIGH | AV:N/AC:L/Au:N/C:C/I:C/A:C |
10.0
|
10.0
|
NIST | |
|
9.8
|
CRITICAL | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
Red Hat, Inc. | |
|
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-2020-1747
-
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 (Secondary)
- secalert@redhat.com (Primary)
References for CVE-2020-1747
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7PPAS6C4SZRDQLR7C22A5U3QOLXY33JX/
[SECURITY] Fedora 32 Update: PyYAML-5.4.1-1.fc32 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://github.com/yaml/pyyaml/pull/386
Prevents arbitrary code execution during python/object/new constructor by ret2libc · Pull Request #386 · yaml/pyyaml · GitHubPatch;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/K5HEPD7LEVDPCITY5IMDYWXUMX37VFMY/
[SECURITY] Fedora 32 Update: PyYAML-5.3.1-1.fc32 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1747
1807367 – (CVE-2020-1747) CVE-2020-1747 PyYAML: arbitrary command execution through python/object/new when FullLoader is usedIssue Tracking;Patch;Third Party Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00017.html
[security-announce] openSUSE-SU-2020:0630-1: important: Security updateMailing List;Third Party Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00017.html
[security-announce] openSUSE-SU-2020:0507-1: important: Security updateMailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MMQXSZXNJT6ERABJZAAICI3DQSQLCP3D/
[SECURITY] Fedora 33 Update: PyYAML-5.4.1-1.fc33 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WORRFHPQVAFKKXXWLSSW6XKUYLWM6CSH/
[SECURITY] Fedora 30 Update: PyYAML-5.3.1-1.fc30 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://www.oracle.com/security-alerts/cpujul2022.html
Oracle Critical Patch Update Advisory - July 2022Patch;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZBJA3SGNJKCAYPSHOHWY3KBCWNM5NYK2/
[SECURITY] Fedora 31 Update: PyYAML-5.3.1-1.fc31 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
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