CVE-2019-19333: Buffer Overflow
First published: Wed Dec 04 2019(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/libyang | <1.0 | 1.0 |
| CESNET libyang | =0.11-r1 | |
| CESNET libyang | =0.11-r2 | |
| CESNET libyang | =0.12-r1 | |
| CESNET libyang | =0.12-r2 | |
| CESNET libyang | =0.13-r1 | |
| CESNET libyang | =0.13-r2 | |
| CESNET libyang | =0.14-r1 | |
| CESNET libyang | =0.15-r1 | |
| CESNET libyang | =0.16-r1 | |
| CESNET libyang | =0.16-r2 | |
| CESNET libyang | =0.16-r3 | |
| CESNET libyang | =1.0-r1 | |
| CESNET libyang | =1.0-r2 | |
| CESNET libyang | =1.0-r3 | |
| CESNET libyang | =1.0-r4 | |
| Red Hat Enterprise Linux | =8.0 |
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Reference Links
- https://access.redhat.com/errata/RHSA-2019:4360
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19333
- https://github.com/CESNET/libyang/commit/f6d684ade99dd37b21babaa8a856f64faa1e2e0d
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PETB6TVMFV5KUD4IKVP2JPLBCYHUGSAJ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RL54JMS7XW7PI6JC4BFSNNLSX5AINQUL/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1780495
- https://access.redhat.com/security/cve/cve-2019-19333
- https://bugzilla.redhat.com/show_bug.cgi?id=1779573
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PETB6TVMFV5KUD4IKVP2JPLBCYHUGSAJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RL54JMS7XW7PI6JC4BFSNNLSX5AINQUL/
Frequently Asked Questions
What is the severity of CVE-2019-19333?
CVE-2019-19333 is classified as a high severity vulnerability due to its potential to cause denial of service through a stack-based buffer overflow.
How do I fix CVE-2019-19333?
To fix CVE-2019-19333, update libyang to version 1.0-r5 or later.
Which versions of libyang are affected by CVE-2019-19333?
All versions of libyang prior to 1.0-r5 are affected by CVE-2019-19333.
What type of attack does CVE-2019-19333 enable?
CVE-2019-19333 enables an attacker to exploit stack-based buffer overflow vulnerabilities, potentially leading to denial of service.
Is CVE-2019-19333 specific to certain operating systems?
CVE-2019-19333 primarily affects applications using libyang across various operating systems where vulnerable versions are installed.
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- version/cesnet libyang/0.13-r1
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- version/cesnet libyang/0.15-r1
- version/cesnet libyang/0.16-r1
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