CVE-2020-28928
MEDIUMCVSS 5.5/10EPSS 0.64%
Last modified
CVE-2020-28928 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. In musl libc through 1.2.1, wcsnrtombs mishandles particular combinations of destination buffer size and source character limit, as demonstrated by an invalid write access (buffer overflow).. EPSS estimates a 0.64% chance of exploitation in the next 30 days.
Description
In musl libc through 1.2.1, wcsnrtombs mishandles particular combinations of destination buffer size and source character limit, as demonstrated by an invalid write access (buffer overflow).
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Musl-Libc | Musl | <= 1.2.1 |
| Debian | Debian Linux | 9.0 |
| Fedoraproject | Fedora | 33 |
| Fedoraproject | Fedora | 34 |
| Oracle | Graalvm | 20.3.2 |
| Oracle | Graalvm | 21.1.0 |
References
- http://www.openwall.com/lists/oss-security/2020/11/20/4Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/11/msg00050.htmlMailing List, Third Party Advisory
- https://musl.libc.org/releases.htmlRelease Notes, Vendor Advisory
- https://www.oracle.com//security-alerts/cpujul2021.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/11/20/4Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/11/msg00050.htmlMailing List, Third Party Advisory
- https://musl.libc.org/releases.htmlRelease Notes, Vendor Advisory
- https://www.oracle.com//security-alerts/cpujul2021.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-28928?
In musl libc through 1.2.1, wcsnrtombs mishandles particular combinations of destination buffer size and source character limit, as demonstrated by an invalid write access (buffer overflow).
How severe is CVE-2020-28928?
CVE-2020-28928 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.64% probability of exploitation in the next 30 days.
How do I fix CVE-2020-28928?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2020-28928?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST