PT-2021-3660 · Unknown+7 · Libarchive+7

Florian Weimer + 1 · Published 2021-03-22 · Updated 2024-11-11 · CVE-2021-36976

Positive Technologies (AI Summary)

CVSS v2.0

7.1

High

Base vector

AV:N/AC:M/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions libarchive versions 3.4.1 through 3.5.1

Description The issue is related to a use-after-free in the copy string function, which is called from do uncompress block and process block functions. This can allow a remote attacker to execute arbitrary code and affect the system, potentially leading to a denial of service. The vulnerability is associated with the use of memory after it has been freed.

Recommendations For libarchive versions 3.4.1 through 3.5.1, consider disabling the copy string function as a temporary workaround until a patch is available. Restrict access to the do uncompress block and process block functions to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

ALT-PU-2022-1454

ALT-PU-2022-1524

ALT-PU-2022-3332

AZL-6614

BDU:2021-03887

CVE-2021-36976

DLA-3950-1

MGASA-2022-0060

OESA-2021-1398

OPENSUSE-SU-2022:0944-1

OPENSUSE-SU-2022_0944-1

OPENSUSE-SU-2022_1930-1

OPENSUSE-SU-2024:11894-1

SUSE-SU-2022:0944-1

SUSE-SU-2022:0944-2

SUSE-SU-2022:1930-1

USN-5291-1

Affected Products

Alt Linux

Astra Linux

Linuxmint

Apple Macos

Suse

Ubuntu

Windows

Libarchive

References · 69

• https://osv.dev/vulnerability/SUSE-SU-2022:0944-2 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-36976 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-36976 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2021-36976 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se17-bulletin-2022-0819SE17 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-3950-1 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se47-bulletin-2022-0926SE47 · Vendor Advisory
• https://osv.dev/vulnerability/USN-5291-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:0944-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:11894-1 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se16-bulletin-20220829SE16 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2022-0060 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2022-0060.html · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-36976 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2021-36976 · Vendor Advisory