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CVE-2021-32628Date: (C)2021-10-05   (M)2023-12-22


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.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 7.5CVSS Score : 6.0
Exploit Score: 1.6Exploit Score: 6.8
Impact Score: 5.9Impact Score: 6.4
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: NETWORKAccess Vector: NETWORK
Attack Complexity: HIGHAccess Complexity: MEDIUM
Privileges Required: LOWAuthentication: SINGLE
User Interaction: NONEConfidentiality: PARTIAL
Scope: UNCHANGEDIntegrity: PARTIAL
Confidentiality: HIGHAvailability: PARTIAL
Integrity: HIGH 
Availability: HIGH 
  
Reference:
DSA-5001
FEDORA-2021-61c487f241
FEDORA-2021-8913c7900c
FEDORA-2021-aa94492a09
GLSA-202209-17
https://github.com/redis/redis/commit/f6a40570fa63d5afdd596c78083d754081d80ae3
https://github.com/redis/redis/security/advisories/GHSA-vw22-qm3h-49pr
https://security.netapp.com/advisory/ntap-20211104-0003/
https://www.oracle.com/security-alerts/cpuapr2022.html

CPE    1
cpe:/a:redis:redis
CWE    1
CWE-190
OVAL    17
oval:org.secpod.oval:def:506390
oval:org.secpod.oval:def:506386
oval:org.secpod.oval:def:506384
oval:org.secpod.oval:def:120872
...

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