Vulnerability · Published Oct 4, 2021 · Assigned by GitHub_M
CVE-2021-41099Integer overflow issue with strings in Redis
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 3.6% (higher than 90% 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 underlying string library can be used to corrupt the heap and potentially result with denial of service or remote code execution. The vulnerability involves changing the default proto-max-bulk-len configuration parameter to a very large value and constructing specially crafted network payloads or commands. The problem is fixed in Redis versions 6.2.6, 6.0.16 and 5.0.14. 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.
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-2021-41099 |
| Alpine:v3.21 | redis | 6.2.6-r0 | ALPINE-CVE-2021-41099 |
| Alpine:v3.22 | redis | 6.2.6-r0 | ALPINE-CVE-2021-41099 |
| Alpine:v3.23 | redis | 6.2.6-r0 | ALPINE-CVE-2021-41099 |
| Alpine:v3.24 | redis | 6.2.6-r0 | ALPINE-CVE-2021-41099 |
| Debian:12 | redis | 5:6.0.16-1 | DEBIAN-CVE-2021-41099 |
| Debian:13 | redis | 5:6.0.16-1 | DEBIAN-CVE-2021-41099 |
| Debian:14 | redis | 5:6.0.16-1 | DEBIAN-CVE-2021-41099 |
| 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-j3cr-9h5g-6cph x_refsource_CONFIRM
- https://github.com/redis/redis/commit/c6ad876774f3cc11e32681ea02a2eead00f2c521 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