CVE-2021-32627

Common vulnerabilities & exposures (CVE)

CVE database CVE database blogpost Release & EoL database

Published at: - 04-10-2021 08:15

Last modified: - 13-05-2022 07:21

Total changes: - 6

Description

Redis is an open source, in-memory database that persists on disk. In affected versions an integer overflow bug in Redis can be exploited to corrupt the heap and potentially result with remote code execution. The vulnerability involves changing the default proto-max-bulk-len and client-query-buffer-limit configuration parameters to very large values and constructing specially crafted very large stream elements. The problem is fixed in Redis 6.2.6, 6.0.16 and 5.0.14. For users unable to upgrade an additional workaround to mitigate the problem without patching the redis-server executable is to prevent users from modifying the proto-max-bulk-len configuration parameter. This can be done using ACL to restrict unprivileged users from using the CONFIG SET command.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

High

Attack complexity

Network

Attack vector

High

Availability

High

Confidentiality

High

Integrity

Low

Privileges required

Unchanged

Scope

None

User interaction

7.5

Base score

1.6

5.9

Exploitability score

Impact score

Verification logic

vendor=redis AND product=redis AND versionStartIncluding=6.2.0 AND versionEndExcluding=6.2.6

vendor=redis AND product=redis AND versionStartIncluding=6.0.0 AND versionEndExcluding=6.0.16

vendor=redis AND product=redis AND versionStartIncluding=5.0.0 AND versionEndExcluding=5.0.14

vendor=fedoraproject AND product=fedora AND version=33

vendor=fedoraproject AND product=fedora AND version=34

vendor=fedoraproject AND product=fedora AND version=35

vendor=Debian AND product=debian_linux AND version=10.0

vendor=Debian AND product=debian_linux AND version=11.0

vendor=netapp AND product=management_services_for_element_software AND version=-

vendor=netapp AND product=management_services_for_netapp_hci AND version=-

vendor=oracle AND product=communications_operations_monitor AND version=4.3

vendor=oracle AND product=communications_operations_monitor AND version=4.4

vendor=oracle AND product=communications_operations_monitor AND version=5.0

Reference

https://github.com/redis/redis/commit/f6a40570fa63d5afdd596c78083d754081d80ae3
https://github.com/redis/redis/security/advisories/GHSA-f434-69fm-g45v
FEDORA-2021-8913c7900c-Mailing List, Third Party Advisory
FEDORA-2021-61c487f241-Mailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20211104-0003/
FEDORA-2021-aa94492a09-Mailing List, Third Party Advisory
DSA-5001-Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html

Keywords

CVE-2021-32627

Common vulnerabilities & exposures (CVE)

Description

Common Vulnerability Scoring System (CVSS)

Verification logic

Reference

NVD

CVE-2021-32627

CVE

Common vulnerabilities & exposures

CVSS

Common vulnerability scoring system

Security

Vulnerabilities

Exposures