medium
6.2
CWE
119 787
Advisory Published
Updated

CVE-2020-28928: Buffer Overflow

First published: Tue Nov 24 2020(Updated: )

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).

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
IBM Security Verify Bridge<=All
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

Remedy

https://www.oracle.com//security-alerts/cpujul2021.html

Remedy

https://www.oracle.com/security-alerts/cpuoct2021.html

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2020-28928?

    CVE-2020-28928 is a vulnerability in musl libc that allows a local attacker to cause a denial of service.

  • What is the severity of CVE-2020-28928?

    CVE-2020-28928 has a severity rating of 6.2 (Medium).

  • Which software versions are affected by CVE-2020-28928?

    musl libc 1.2.1, Debian Linux 9.0, Fedora 33, Fedora 34, Oracle GraalVM 20.3.2, Oracle GraalVM 21.1.0, and IBM Security Verify Bridge (all versions) are affected by CVE-2020-28928.

  • How can an attacker exploit CVE-2020-28928?

    A local attacker can exploit CVE-2020-28928 by sending specially-crafted input to the wcsnrtombs function, causing the application to enter into an infinite loop.

  • Are there any references for CVE-2020-28928?

    Yes, you can find more information about CVE-2020-28928 at the following references: [link1], [link2], [link3].

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