PT-2021-5556 · Unknown+10 · Gnu C Library+10

Published 2020-07-09 · Updated 2024-08-15 · CVE-2020-27618

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 GNU C Library (glibc) versions 2.32 and earlier

Description The issue is related to the iconv function in the GNU C Library, which fails to advance the input state when processing invalid multi-byte input sequences in certain encodings, such as IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399. This could lead to an infinite loop in applications, resulting in a denial of service.

Recommendations For GNU C Library (glibc) versions 2.32 and earlier, consider updating to a version later than 2.32 to resolve the issue. As a temporary workaround, consider restricting the use of the iconv function with the affected encodings until a patch is available.

Exploit

Fix

DoS

Infinite Loop

Weakness Enumeration

CWE-835

Related Identifiers

ALSA-2021:1585

ALT-PU-2020-3524

ALT-PU-2021-2862

ALT-PU-2021-2880

ALT-PU-2021-3034

BDU:2021-06406

CESA-2021_1585

CVE-2020-27618

DLA-3152-1

MGASA-2021-0150

OPENSUSE-SU-2021:0358-1

OPENSUSE-SU-2021_0358-1

OPENSUSE-SU-2024:10792-1

RHSA-2021:1585

RHSA-2021_1585

RLSA-2021:1585

SUSE-SU-2021:0653-1

SUSE-SU-2021:1165-1

SUSE-SU-2021_1165-1

SUSE-SU-2022:2886-1

SUSE-SU-2024:0759-1

USN-5310-1

USN-5768-1

Affected Products

Alt Linux

Almalinux

Astra Linux

Centos

Gnu C Library

Linuxmint

Red Hat

Red Os

Rocky Linux

Suse

Ubuntu

References · 130

• 🔥 https://sourceware.org/bugzilla/show_bug.cgi?id=26224 · Exploit
• https://ubuntu.com/security/CVE-2020-29562 · Vendor Advisory
• http://repo.red-soft.ru/redos/7.3c/x86_64/updates · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:0653-1 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2021-1585.html · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2021:1585 · Vendor Advisory
• https://osv.dev/vulnerability/USN-5768-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-27618 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-27618 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-6096 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2021-0150.html · Security Note
• https://osv.dev/vulnerability/RLSA-2021:1585 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-25013 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-10228 · Vendor Advisory
• https://sourceware.org/bugzilla/show_bug.cgi?id=19519#c21 · Patch