| Name | CVE-2021-32627 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-5001-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| redis (PTS) | jessie, jessie (lts) | 2:2.8.17-1+deb8u13 | fixed |
| stretch (security) | 3:3.2.6-3+deb9u9 | vulnerable |
| stretch (lts), stretch | 3:3.2.6-3+deb9u13 | vulnerable |
| buster, buster (lts) | 5:5.0.14-1+deb10u6 | fixed |
| buster (security) | 5:5.0.14-1+deb10u5 | fixed |
| bullseye | 5:6.0.16-1+deb11u2 | fixed |
| bullseye (security) | 5:6.0.16-1+deb11u4 | fixed |
| bookworm (security), bookworm | 5:7.0.15-1~deb12u1 | fixed |
| sid, trixie | 5:7.0.15-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| redis | source | jessie | (not affected) | | | |
| redis | source | buster | 5:5.0.14-1+deb10u1 | | DSA-5001-1 | |
| redis | source | bullseye | 5:6.0.16-1+deb11u1 | | DSA-5001-1 | |
| redis | source | (unstable) | 5:6.0.16-1 | | | |
Notes
[stretch] - redis <ignored> (Minor issue; invasive patch)
https://github.com/redis/redis/security/advisories/GHSA-f434-69fm-g45v
[jessie] - redis <not-affected> (Minor issue; invasive patch; parts not vulnerable)