Vulnerability Details : CVE-2019-19333
In all versions of libyang before 1.0-r5, a stack-based buffer overflow was discovered in the way libyang parses YANG files with a leaf of type "bits". An application that uses libyang to parse untrusted YANG files may be vulnerable to this flaw, which would allow an attacker to cause a denial of service or possibly gain code execution.
Vulnerability category: OverflowMemory CorruptionDenial of service
Products affected by CVE-2019-19333
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:0.11:r1:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:0.11:r2:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:0.12:r1:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:0.12:r2:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:0.13:r1:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:0.13:r2:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:0.14:r1:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:0.15:r1:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:0.16:r1:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:0.16:r2:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:0.16:r3:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:1.0:r1:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:1.0:r2:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:1.0:r3:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:1.0:r4:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-19333
0.28%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 51 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-19333
| 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 | |
|
8.1
|
HIGH | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
2.2
|
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-2019-19333
-
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).Assigned by: secalert@redhat.com (Secondary)
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-19333
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RL54JMS7XW7PI6JC4BFSNNLSX5AINQUL/
[SECURITY] Fedora 30 Update: libyang-1.0.101-1.fc30 - package-announce - Fedora Mailing-Lists
-
https://github.com/CESNET/libyang/commit/f6d684ade99dd37b21babaa8a856f64faa1e2e0d
parser BUGFIX long identity name buffer overflow · CESNET/libyang@f6d684a · GitHubPatch;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PETB6TVMFV5KUD4IKVP2JPLBCYHUGSAJ/
[SECURITY] Fedora 31 Update: libyang-1.0.101-1.fc31 - package-announce - Fedora Mailing-Lists
-
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19333
1779573 – (CVE-2019-19333) CVE-2019-19333 libyang: stack-based buffer overflow in make_canonical when bits leaf type is usedIssue Tracking;Third Party Advisory
-
https://access.redhat.com/errata/RHSA-2019:4360
RHSA-2019:4360 - Security Advisory - Red Hat Customer Portal
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