PT-2020-6698 · Musl Libc+4 · Musl Libc+4

Published 2020-11-18 · Updated 2024-10-17 · CVE-2020-28928

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions musl libc versions 1.2.1 and earlier

Description The issue is related to the wcsnrtombs function in musl libc, which mishandles certain combinations of destination buffer size and source character limit. This can lead to an invalid write access, resulting in a buffer overflow. The exploitation of this issue may allow an attacker to cause a denial of service.

Recommendations For musl libc versions 1.2.1 and earlier, consider updating to a version later than 1.2.1 to resolve the issue. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Infinite Loop

Memory Corruption

Weakness Enumeration

CWE-835

CWE-787

Related Identifiers

ALT-PU-2024-13885

BDU:2022-05187

CVE-2020-28928

DLA-2474-1

USN-5990-1

Affected Products

Alt Linux

Astra Linux

Linuxmint

Ubuntu

Musl Libc

References · 38

• https://musl.libc.org/releases.html · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-05187 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2020-28928 · Security Note
• https://oracle.com/security-alerts/cpuoct2021.html · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-28928 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2020-28928 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-28928 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-28928 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2020-28928 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-14697 · Vendor Advisory
• https://osv.dev/vulnerability/USN-5990-1 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/LKQ3RVSMVZNZNO4D65W2CZZ4DMYFZN2Q · Vendor Advisory
• https://oracle.com//security-alerts/cpujul2021.html · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-28928 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-5990-1 · Vendor Advisory