Vulnerability · Published Oct 4, 2021 · Assigned by GitHub_M
CVE-2021-32628Vulnerability in handling large ziplists
High 7.5
In plain English
A high-severity integer overflow in redis from redis. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 13.5% (higher than 96% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Redis is an open source, in-memory database that persists on disk. An integer overflow bug in the ziplist data structure used by all versions of Redis can be exploited to corrupt the heap and potentially result with remote code execution. The vulnerability involves modifying the default ziplist configuration parameters (hash-max-ziplist-entries, hash-max-ziplist-value, zset-max-ziplist-entries or zset-max-ziplist-value) to a very large value, and then constructing specially crafted commands to create very large ziplists. The problem is fixed in Redis versions 6.2.6, 6.0.16, 5.0.14. An additional workaround to mitigate the problem without patching the redis-server executable is to prevent users from modifying the above configuration parameters. This can be done using ACL to restrict unprivileged users from using the CONFIG SET command.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | redis | 5.0.3-5.module_el8.4.0+2583+b9845322 | ALSA-2021:3918 |
| AlmaLinux:8 | redis | 5.0.3-5.module_el8.5.0+66+fc19ec12 | ALSA-2021:3918 |
| AlmaLinux:8 | redis | 6.0.9-5.module_el8.5.0+67+a3c431d9 | ALSA-2021:3945 |
| AlmaLinux:8 | redis | 6.0.9-5.module_el8.4.0+2584+1bb0d2aa | ALSA-2021:3945 |
| AlmaLinux:8 | redis-devel | 6.0.9-5.module_el8.4.0+2584+1bb0d2aa | ALSA-2021:3945 |
| AlmaLinux:8 | redis-devel | 6.0.9-5.module_el8.5.0+67+a3c431d9 | ALSA-2021:3945 |
| AlmaLinux:8 | redis-devel | 5.0.3-5.module_el8.5.0+66+fc19ec12 | ALSA-2021:3918 |
| AlmaLinux:8 | redis-devel | 5.0.3-5.module_el8.4.0+2583+b9845322 | ALSA-2021:3918 |
| AlmaLinux:8 | redis-doc | 5.0.3-5.module_el8.4.0+2583+b9845322 | ALSA-2021:3918 |
| AlmaLinux:8 | redis-doc | 6.0.9-5.module_el8.4.0+2584+1bb0d2aa | ALSA-2021:3945 |
| Alpine:v3.20 | redis | 6.2.6-r0 | ALPINE-CVE-2021-32628 |
| Alpine:v3.21 | redis | 6.2.6-r0 | ALPINE-CVE-2021-32628 |
| Alpine:v3.22 | redis | 6.2.6-r0 | ALPINE-CVE-2021-32628 |
| Alpine:v3.23 | redis | 6.2.6-r0 | ALPINE-CVE-2021-32628 |
| Alpine:v3.24 | redis | 6.2.6-r0 | ALPINE-CVE-2021-32628 |
| Debian:12 | redis | 5:6.0.16-1 | DEBIAN-CVE-2021-32628 |
| Debian:13 | redis | 5:6.0.16-1 | DEBIAN-CVE-2021-32628 |
| Debian:14 | redis | 5:6.0.16-1 | DEBIAN-CVE-2021-32628 |
| Rocky Linux:8 | redis | 0:6.0.9-5.module+el8.4.0+660+a8447b97 | RLSA-2021:3945 |
| Rocky Linux:8 | redis | 0:6.0.9-5.module+el8.5.0+658+72172854 | RLSA-2021:3945 |
| Rocky Linux:8 | redis | 0:5.0.3-5.module+el8.4.0+659+cf535ef1 | RLSA-2021:3918 |
| Rocky Linux:8 | redis | 0:5.0.3-5.module+el8.5.0+657+2674830e | RLSA-2021:3918 |
Affected products (as reported)
Weakness: CWE-190, CWE-680 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/redis/redis/security/advisories/GHSA-vw22-qm3h-49pr x_refsource_CONFIRM
- https://github.com/redis/redis/commit/f6a40570fa63d5afdd596c78083d754081d80ae3 x_refsource_MISC
- FEDORA-2021-8913c7900c vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-61c487f241 vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-aa94492a09 vendor-advisory, x_refsource_FEDORA
- DSA-5001 vendor-advisory, x_refsource_DEBIAN
- https://www.oracle.com/security-alerts/cpuapr2022.html x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20211104-0003/ x_refsource_CONFIRM
- GLSA-202209-17 vendor-advisory, x_refsource_GENTOO