Integer overflow issue with strings in Redis
CVE-2021-41099

7.5HIGH

Key Information:

Vendor

Redis

Status
Redis
Vendor
CVE Published:
4 October 2021

What is CVE-2021-41099?

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.

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Deploy the Patch

Affected Version(s)

redis < 5.0.14 < 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/security/advisories/GHSA-j...
x_refsource_CONFIRM
https://github.com/redis/redis/commit/c6ad876774f3cc11e32...
x_refsource_MISC
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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