PT-2021-4689 · Uclibc-Ng+1 · Uclibc-Ng+1

Published 2021-05-02 · Updated 2022-05-12 · CVE-2021-27419

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions uClibc-ng versions prior to 1.0.37

Description The issue is related to an integer overflow vulnerability in the uClibc library for Linux operating systems. This vulnerability can be exploited by a remote attacker to execute arbitrary code. The improper memory assignment in functions such as malloc-simple can lead to unexpected behavior, including crashes or remote code injection/execution.

Recommendations For versions prior to 1.0.37, update to version 1.0.37 or later to resolve the issue. As a temporary workaround, consider restricting access to the malloc-simple function to minimize the risk of exploitation.

Fix

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

BDU:2021-05386

CVE-2021-27419

Affected Products

Debian

Uclibc-Ng

References · 13

• https://osv.dev/vulnerability/DEBIAN-CVE-2021-27419 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-05386 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-27419 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-27419 · Vendor Advisory
• https://downloads.uclibc-ng.org/releases · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-27419 · Security Note
• https://cisecurity.org/advisory/multiple-vulnerabilities-in-real-time-operating-systems-rtos-could-allow-for-remote-code-execution_2021-058 · Note
• https://global.medical.canon/service-support/securityinformation/memory-allocation-vulnerabilities · Note
• https://avertium.com/blog/overview-badalloc-vulnerabilities · Note
• https://auscert.org.au/bulletins/ESB-2021.1489.2 · Note
• https://cisa.gov/uscert/ics/advisories/icsa-21-119-04 · Note
• https://hivepro.com/wp-content/uploads/2021/05/Threat-Advisory-TA212109.pdf · Note
• https://t.me/cvenotify/29658 · Telegram Post