// For flags

CVE-2021-29477

Vulnerability in the STRALGO LCS command

Severity Score

8.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache, and message broker. An integer overflow bug in Redis version 6.0 or newer could be exploited using the `STRALGO LCS` command to corrupt the heap and potentially result with remote code execution. The problem is fixed in version 6.2.3 and 6.0.13. An additional workaround to mitigate the problem without patching the redis-server executable is to use ACL configuration to prevent clients from using the `STRALGO LCS` command.

Redis es una estructura de datos en memoria de código abierto (con licencia BSD) almacenado, utilizado como base de datos, caché y agente de mensajes. Un bug de desbordamiento de enteros en Redis versión 6.0 o más reciente podría ser explotada usando el comando "STRALGO LCS" para corromper la pila y potencialmente resultar en una ejecución de código remota. El problema se corrigió en las versiones 6.2.3 y 6.0.13. Una solución alternativa para mitigar el problema sin parchear el ejecutable redis-server es usar la configuración de ACL para impedir que los clientes usen el comando "STRALGO LCS"

A flaw was found in redis. An integer overflow bug could be exploited to corrupt the heap and potentially result with remote code execution. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-03-30 CVE Reserved
  • 2021-05-04 CVE Published
  • 2023-11-08 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-190: Integer Overflow or Wraparound
  • CWE-787: Out-of-bounds Write
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Redislabs
Search vendor "Redislabs"
 Redis
Search vendor "Redislabs" for product "Redis"
 >= 6.0.0 < 6.0.13
Search vendor "Redislabs" for product "Redis" and version " >= 6.0.0 < 6.0.13"
-
Affected
Redislabs
Search vendor "Redislabs"
 Redis
Search vendor "Redislabs" for product "Redis"
 >= 6.2.0 < 6.2.3
Search vendor "Redislabs" for product "Redis" and version " >= 6.2.0 < 6.2.3"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 33
Search vendor "Fedoraproject" for product "Fedora" and version "33"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 34
Search vendor "Fedoraproject" for product "Fedora" and version "34"
-
Affected