CVE-2021-32675 SUSE CVE security@suse.de SUSE Security Team SUSE CVE-2021-32675 Interim 1 22 2025-02-17T00:37:14Z current 2021-10-05T01:02:05Z 2025-02-17T00:37:14Z cve-database/bin/generate-cvrf-cve.pl 2020-12-27T01:00:00Z CVE-2021-32675 Redis is an open source, in-memory database that persists on disk. When parsing an incoming Redis Standard Protocol (RESP) request, Redis allocates memory according to user-specified values which determine the number of elements (in the multi-bulk header) and size of each element (in the bulk header). An attacker delivering specially crafted requests over multiple connections can cause the server to allocate significant amount of memory. Because the same parsing mechanism is used to handle authentication requests, this vulnerability can also be exploited by unauthenticated users. The problem is fixed in Redis versions 6.2.6, 6.0.16 and 5.0.14. An additional workaround to mitigate this problem without patching the redis-server executable is to block access to prevent unauthenticated users from connecting to Redis. This can be done in different ways: Using network access control tools like firewalls, iptables, security groups, etc. or Enabling TLS and requiring users to authenticate using client side certificates. The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). https://lists.suse.com/pipermail/sle-security-updates/2021-November/009767.html E-Mail link for SUSE-SU-2021:3772-1 https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/OTFIHYYQFTTATMKJQIWNX7F7WKXQXYDB/ E-Mail link for openSUSE-SU-2021:3772-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings SUSE Linux Enterprise Module for Server Applications 15 SP2 SUSE Linux Enterprise Module for Server Applications 15 SP3 SUSE Liberty Linux 8 SUSE Linux Enterprise Module for Server Applications 15 SP2 SUSE Linux Enterprise Module for Server Applications 15 SP3 SUSE Linux Enterprise Module for Server Applications 15 SP4 SUSE Linux Enterprise Module for Server Applications 15 SP2 SUSE Linux Enterprise Module for Server Applications 15 SP3 SUSE Linux Enterprise Module for Server Applications 15 SP4 SUSE Linux Enterprise Module for Server Applications 15 SP2 SUSE Linux Enterprise Module for Server Applications 15 SP3 SUSE Linux Enterprise Module for Server Applications 15 SP4 SUSE Linux Enterprise Module for Server Applications 15 SP2 SUSE Linux Enterprise Module for Server Applications 15 SP3 SUSE Linux Enterprise Module for Server Applications 15 SP4 SUSE Linux Enterprise Module for Server Applications 15 SP2 SUSE Linux Enterprise Module for Server Applications 15 SP3 SUSE Linux Enterprise Module for Server Applications 15 SP4 SUSE Linux Enterprise Module for Server Applications 15 SP2 SUSE Linux Enterprise Module for Server Applications 15 SP3 SUSE Linux Enterprise Module for Server Applications 15 SP4 openSUSE Leap 15.3 openSUSE Tumbleweed redis redis-6.0.14-6.8.1 redis-6.0.9-5.module+el8.4.0+12929+1bb0d2aa redis-6.2.6-1.1 redis-6.2.6-150400.1.5 redis-devel-6.0.9-5.module+el8.4.0+12929+1bb0d2aa redis-doc-6.0.9-5.module+el8.4.0+12929+1bb0d2aa redis-6.0.9-5.module+el8.4.0+12929+1bb0d2aa as a component of SUSE Liberty Linux 8 redis-devel-6.0.9-5.module+el8.4.0+12929+1bb0d2aa as a component of SUSE Liberty Linux 8 redis-doc-6.0.9-5.module+el8.4.0+12929+1bb0d2aa as a component of SUSE Liberty Linux 8 redis-6.0.14-6.8.1 as a component of SUSE Linux Enterprise Module for Server Applications 15 SP2 redis-6.0.14-6.8.1 as a component of SUSE Linux Enterprise Module for Server Applications 15 SP3 redis-6.2.6-150400.1.5 as a component of SUSE Linux Enterprise Module for Server Applications 15 SP4 redis-6.0.14-6.8.1 as a component of openSUSE Leap 15.3 redis-6.2.6-1.1 as a component of openSUSE Tumbleweed redis as a component of SUSE Linux Enterprise Module for Server Applications 15 SP4 Redis is an open source, in-memory database that persists on disk. When parsing an incoming Redis Standard Protocol (RESP) request, Redis allocates memory according to user-specified values which determine the number of elements (in the multi-bulk header) and size of each element (in the bulk header). An attacker delivering specially crafted requests over multiple connections can cause the server to allocate significant amount of memory. Because the same parsing mechanism is used to handle authentication requests, this vulnerability can also be exploited by unauthenticated users. The problem is fixed in Redis versions 6.2.6, 6.0.16 and 5.0.14. An additional workaround to mitigate this problem without patching the redis-server executable is to block access to prevent unauthenticated users from connecting to Redis. This can be done in different ways: Using network access control tools like firewalls, iptables, security groups, etc. or Enabling TLS and requiring users to authenticate using client side certificates. CVE-2021-32675 SUSE Liberty Linux 8:redis-6.0.9-5.module+el8.4.0+12929+1bb0d2aa SUSE Liberty Linux 8:redis-devel-6.0.9-5.module+el8.4.0+12929+1bb0d2aa SUSE Liberty Linux 8:redis-doc-6.0.9-5.module+el8.4.0+12929+1bb0d2aa SUSE Linux Enterprise Module for Server Applications 15 SP2:redis-6.0.14-6.8.1 SUSE Linux Enterprise Module for Server Applications 15 SP3:redis-6.0.14-6.8.1 SUSE Linux Enterprise Module for Server Applications 15 SP4:redis-6.2.6-150400.1.5 openSUSE Leap 15.3:redis-6.0.14-6.8.1 openSUSE Tumbleweed:redis-6.2.6-1.1 SUSE Linux Enterprise Module for Server Applications 15 SP4:redis important 5 AV:N/AC:L/Au:N/C:N/I:N/A:P 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H