Vulnerabilities > CVE-2021-32761

CVSS 7.5 - HIGH

Attack vector

NETWORK

Attack complexity

HIGH

Privileges required

LOW

Confidentiality impact

HIGH

Integrity impact

HIGH

Availability impact

HIGH

network

high complexity

redislabs

debian

fedoraproject

NVD

Published: 2021-07-21

Updated: 2024-11-21

Summary

Redis is an in-memory database that persists on disk. A vulnerability involving out-of-bounds read and integer overflow to buffer overflow exists starting with version 2.2 and prior to versions 5.0.13, 6.0.15, and 6.2.5. On 32-bit systems, Redis `*BIT*` command are vulnerable to integer overflow that can potentially be exploited to corrupt the heap, leak arbitrary heap contents or trigger remote code execution. The vulnerability involves changing the default `proto-max-bulk-len` configuration parameter to a very large value and constructing specially crafted commands bit commands. This problem only affects Redis on 32-bit platforms, or compiled as a 32-bit binary. Redis versions 5.0.`3m 6.0.15, and 6.2.5 contain patches for this issue. 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.

Vulnerable Configurations

Part	Description	Count
Application	Redislabs Redislabs Redis 6.2.0 Redislabs Redis 6.2.1 Redislabs Redis 6.2.2 Redislabs Redis 6.2.3 Redislabs Redis 6.2.4 Redislabs Redis 6.0 Redislabs Redis 6.0.0 Redislabs Redis 6.0.1 Redislabs Redis 6.0.2 Redislabs Redis 6.0.3 Redislabs Redis 6.0.4 Redislabs Redis 6.0.5 Redislabs Redis 6.0.6 Redislabs Redis 6.0.7 Redislabs Redis 6.0.8 Redislabs Redis 6.0.9 Redislabs Redis 6.0.10 Redislabs Redis 6.0.11 Redislabs Redis 6.0.12 Redislabs Redis 2.2.0 Redislabs Redis 2.2.1 Redislabs Redis 2.2.2 Redislabs Redis 2.2.3 Redislabs Redis 2.2.4 Redislabs Redis 2.2.5 Redislabs Redis 2.2.6 Redislabs Redis 2.2.7 Redislabs Redis 2.2.8 Redislabs Redis 2.2.9 Redislabs Redis 2.2.10 Redislabs Redis 2.2.11 Redislabs Redis 2.2.12 Redislabs Redis 2.2.13 Redislabs Redis 2.2.14 Redislabs Redis 2.2.15 Redislabs Redis 2.2.105 Redislabs Redis 2.2.106 Redislabs Redis 2.2.107 Redislabs Redis 2.2.110 Redislabs Redis 2.2.111 Redislabs Redis 2.3 Redislabs Redis 2.4.0 Redislabs Redis 2.4.1 Redislabs Redis 2.4.2 Redislabs Redis 2.4.3 Redislabs Redis 2.4.4 Redislabs Redis 2.4.5 Redislabs Redis 2.4.6 Redislabs Redis 2.4.7 Redislabs Redis 2.4.8 Redislabs Redis 2.4.9 Redislabs Redis 2.4.10 Redislabs Redis 2.4.11 Redislabs Redis 2.4.12 Redislabs Redis 2.4.13 Redislabs Redis 2.4.14 Redislabs Redis 2.4.15 Redislabs Redis 2.4.16 Redislabs Redis 2.4.17 Redislabs Redis 2.4.18 Redislabs Redis 2.6.0 Redislabs Redis 2.6.1 Redislabs Redis 2.6.2 Redislabs Redis 2.6.3 Redislabs Redis 2.6.4 Redislabs Redis 2.6.5 Redislabs Redis 2.6.6 Redislabs Redis 2.6.7 Redislabs Redis 2.6.7-1 Redislabs Redis 2.6.8 Redislabs Redis 2.6.8-1 Redislabs Redis 2.6.9 Redislabs Redis 2.6.9-1 Redislabs Redis 2.6.10 Redislabs Redis 2.6.10-1 Redislabs Redis 2.6.10-2 Redislabs Redis 2.6.10-3 Redislabs Redis 2.6.11 Redislabs Redis 2.6.12 Redislabs Redis 2.6.13 Redislabs Redis 2.6.14 Redislabs Redis 2.6.14-1 Redislabs Redis 2.6.14-2 Redislabs Redis 2.6.15 Redislabs Redis 2.6.16 Redislabs Redis 2.6.17 Redislabs Redis 2.8.0 Redislabs Redis 2.8.1 Redislabs Redis 2.8.2 Redislabs Redis 2.8.3 Redislabs Redis 2.8.4 Redislabs Redis 2.8.5 Redislabs Redis 2.8.6 Redislabs Redis 2.8.7 Redislabs Redis 2.8.8 Redislabs Redis 2.8.9 Redislabs Redis 2.8.10 Redislabs Redis 2.8.11 Redislabs Redis 2.8.12 Redislabs Redis 2.8.13 Redislabs Redis 2.8.14 Redislabs Redis 2.8.15 Redislabs Redis 2.8.16 Redislabs Redis 2.8.17 Redislabs Redis 2.8.18 Redislabs Redis 2.8.19 Redislabs Redis 2.8.20 Redislabs Redis 2.8.21 Redislabs Redis 2.8.22 Redislabs Redis 2.8.23 Redislabs Redis 2.8.24 Redislabs Redis 3.0 Redislabs Redis 3.0.0 Redislabs Redis 3.0.1 Redislabs Redis 3.0.2 Redislabs Redis 3.0.3 Redislabs Redis 3.0.4 Redislabs Redis 3.0.5 Redislabs Redis 3.0.6 Redislabs Redis 3.0.7 Redislabs Redis 3.2 Redislabs Redis 3.2.0 Redislabs Redis 3.2.1 Redislabs Redis 3.2.2 Redislabs Redis 3.2.3 Redislabs Redis 3.2.4 Redislabs Redis 3.2.5 Redislabs Redis 3.2.6 Redislabs Redis 3.2.7 Redislabs Redis 3.2.8 Redislabs Redis 3.2.9 Redislabs Redis 3.2.10 Redislabs Redis 3.2.11 Redislabs Redis 3.2.12 Redislabs Redis 3.2.13 Redislabs Redis 4.0 Redislabs Redis 4.0.0 Redislabs Redis 4.0.1 Redislabs Redis 4.0.2 Redislabs Redis 4.0.3 Redislabs Redis 4.0.4 Redislabs Redis 4.0.5 Redislabs Redis 4.0.6 Redislabs Redis 4.0.7 Redislabs Redis 4.0.8 Redislabs Redis 4.0.9 Redislabs Redis 4.0.10 Redislabs Redis 4.0.11 Redislabs Redis 4.0.12 Redislabs Redis 4.0.13 Redislabs Redis 4.0.14 Redislabs Redis 5.0 Redislabs Redis 5.0.0 Redislabs Redis 5.0.1 Redislabs Redis 5.0.2 Redislabs Redis 5.0.3 Redislabs Redis 5.0.4 Redislabs Redis 5.0.5 Redislabs Redis 5.0.6 Redislabs Redis 5.0.7 Redislabs Redis 5.0.8 Redislabs Redis 5.0.9 Redislabs Redis 5.0.10 Redislabs Redis 5.0.11 Redislabs Redis 5.0.12	228
OS	Debian Debian Debian Linux 9.0 Debian Debian Linux 10.0 Debian Debian Linux 11.0	3
OS	Fedoraproject Fedoraproject Fedora 33 Fedoraproject Fedora 34	2

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Summary

Vulnerable Configurations

References

Vulnerabilities > CVE-2021-32761