Integer overflow issue with Streams in Redis
CVE-2021-32627

7.5HIGH

Key Information:

Vendor
Redis
Status
Redis
Vendor
CVE Published:
4 October 2021

Summary

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.

Affected Version(s)

redis >= 5.0.0, < 5.0.14 < 5.0.0, 5.0.14

redis >= 6.0.0, < 6.0.16 < 6.0.0, 6.0.16

redis >= 6.2.0, < 6.2.6 < 6.2.0, 6.2.6

References

https://github.com/redis/redis/commit/f6a40570fa63d5afdd5...
x_refsource_MISC
https://github.com/redis/redis/security/advisories/GHSA-f...
x_refsource_CONFIRM
https://lists.fedoraproject.org/archives/list/package-ann...
vendor-advisoryx_refsource_FEDORA

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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