CVE-2021-32672

Redis is an open source, in-memory database that persists on disk. When using the Redis Lua Debugger, users can send malformed requests that cause the debugger’s protocol parser to read data beyond the actual buffer. This issue affects all versions of Redis with Lua debugging support (3.2 or newer). The problem is fixed in versions 6.2.6, 6.0.16 and 5.0.14.

Redis is an open source, in-memory database that persists on disk. When using the Redis Lua Debugger, users can send malformed requests that cause the debugger’s protocol parser to read data beyond the actual buffer. This issue affects all versions of Redis with Lua debugging support (3.2 or newer). The problem is fixed in versions 6.2.6, 6.0.16 and 5.0.14.

Redis is an advanced key-value store. It is often referred to as a dattructure server since keys can contain strings, hashes ,lists, sets anorted sets.

Security Fix(es):

Redis is an open source, in-memory database that persists on disk. When using the Redis Lua Debugger, users can send malformed requests that cause the debugger’s protocol parser to read data beyond the actual buffer. This issue affects all versions of Redis with Lua debugging support (3.2 or newer). The problem is fixed in versions 6.2.6, 6.0.16 and 5.0.14.(CVE-2021-32672)

Redis is an advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets. You can run atomic operations on these types, like appending to a string; incrementing the value in a hash; pushing to a list; computing set intersection, union and difference; or getting the member with highest ranking in a sorted set. In order to achieve its outstanding performance, Redis works with an in-memory dataset. Depending on your use case, you can persist it either by dumping the dataset to disk every once in a while, or by appending each command to a log. Redis also supports trivial-to-setup master-slave replication, with very fast non-blocking first synchronization, auto-reconnection on net split and so forth. Other features include Transactions, Pub/Sub, Lua scripting, Keys with a limited time-to-live, and configuration settings to make Redis behave like a cache. You can use Redis from most programming languages also.

Security Fix(es):

Redis is an open source, in-memory database that persists on disk. When using the Redis Lua Debugger, users can send malformed requests that cause the debugger’s protocol parser to read data beyond the actual buffer. This issue affects all versions of Redis with Lua debugging support (3.2 or newer). The problem is fixed in versions 6.2.6, 6.0.16 and 5.0.14.(CVE-2021-32672)

Redis is an open source, in-memory database that persists on disk. When using the Redis Lua Debugger, users can send malformed requests that cause the debugger’s protocol parser to read data beyond the actual buffer. This issue affects all versions of Redis with Lua debugging support (3.2 or newer). The problem is fixed in versions 6.2.6, 6.0.16 and 5.0.14.

Redis is an open source, in-memory database that persists on disk. When using the Redis Lua Debugger, users can send malformed requests that cause the debugger’s protocol parser to read data beyond the actual buffer. This issue affects all versions of Redis with Lua debugging support (3.2 or newer). The problem is fixed in versions 6.2.6, 6.0.16 and 5.0.14.

Redis is an open source, in-memory database that persists on disk. When using the Redis Lua Debugger, users can send malformed requests that cause the debugger’s protocol parser to read data beyond the actual buffer. This issue affects all versions of Redis with Lua debugging support (3.2 or newer). The problem is fixed in versions 6.2.6, 6.0.16 and 5.0.14.

Redis is an open source, in-memory database that persists on disk. When using the Redis Lua Debugger, users can send malformed requests that cause the debugger’s protocol parser to read data beyond the actual buffer. This issue affects all versions of Redis with Lua debugging support (3.2 or newer). The problem is fixed in versions 6.2.6, 6.0.16 and 5.0.14.

CVE-2021-32626: Specially crafted Lua scripts executing in Redis can cause the heap-based Lua stack to be overflowed, due to incomplete checks for this condition. This can result with heap corruption and potentially remote code execution. CVE-2021-32627: An integer overflow bug in Redis 5.0 or newer can be exploited to corrupt the heap and potentially result with remote code execution. CVE-2021-32628: 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. CVE-2021-32672: When using the Redis Lua Debugger, users can send malformed requests that cause the debugger’s protocol parser to read data beyond the actual buffer. CVE-2021-32675: 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). CVE-2021-32687: An integer overflow bug affecting all versions of Redis can be exploited to corrupt the heap and potentially be used to leak arbitrary contents of the heap or trigger remote code execution. CVE-2021-32762: The redis-cli command line tool and redis-sentinel service may be vulnerable to integer overflow when parsing specially crafted large multi-bulk network replies. CVE-2021-41099: 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.

This update for redis fixes the following issues:

• CVE-2021-32627: Fixed integer to heap buffer overflows with streams (bsc#1191305).
• CVE-2021-32628: Fixed integer to heap buffer overflows handling ziplist-encoded data types (bsc#1191305).
• CVE-2021-32687: Fixed integer to heap buffer overflow with intsets (bsc#1191302).
• CVE-2021-32762: Fixed integer to heap buffer overflow issue in redis-cli and redis-sentinel (bsc#1191300).
• CVE-2021-32626: Fixed heap buffer overflow caused by specially crafted Lua scripts (bsc#1191306).
• CVE-2021-32672: Fixed random heap reading issue with Lua Debugger (bsc#1191304).
• CVE-2021-32675: Fixed Denial Of Service when processing RESP request payloads with a large number of elements on many connections (bsc#1191303).
• CVE-2021-41099: Fixed integer to heap buffer overflow handling certain string commands and network payloads (bsc#1191299).

These are all security issues fixed in the redis-6.2.6-1.1 package on the GA media of openSUSE Tumbleweed.

This update for redis fixes the following issues:

• CVE-2021-32627: Fixed integer to heap buffer overflows with streams (bsc#1191305).
• CVE-2021-32628: Fixed integer to heap buffer overflows handling ziplist-encoded data types (bsc#1191305).
• CVE-2021-32687: Fixed integer to heap buffer overflow with intsets (bsc#1191302).
• CVE-2021-32762: Fixed integer to heap buffer overflow issue in redis-cli and redis-sentinel (bsc#1191300).
• CVE-2021-32626: Fixed heap buffer overflow caused by specially crafted Lua scripts (bsc#1191306).
• CVE-2021-32672: Fixed random heap reading issue with Lua Debugger (bsc#1191304).
• CVE-2021-32675: Fixed Denial Of Service when processing RESP request payloads with a large number of elements on many connections (bsc#1191303).
• CVE-2021-41099: Fixed integer to heap buffer overflow handling certain string commands and network payloads (bsc#1191299).

It was discovered that Redis incorrectly handled certain specially crafted Lua scripts. A remote attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2021-32626)

It was discovered that Redis incorrectly handled some malformed requests when using Redis Lua Debugger. A remote attacker could possibly use this issue to cause a denial of service or other unspecified impact. This issue only affected Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2021-32672)

It was discovered that Redis incorrectly handled certain Redis Standard Protocol (RESP) requests. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2021-32675)

It was discovered that Redis incorrectly handled some configuration parameters with specially crafted network payloads. A remote attacker could possibly use this issue to cause a denial of service or execute arbitrary code. Vulnerabilities CVE-2021-32627 and CVE-2021-41099 only affected Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2021-32627, CVE-2021-32628, CVE-2021-32687, CVE-2021-41099).

It was discovered that Redis incorrectly handled memory when processing certain input in 32-bit systems. A remote attacker could possibly use this issue to cause a denial of service or execute arbitrary code. One vulnerability (CVE-2021-32761) only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM and Ubuntu 18.04 ESM and another vulnerability (CVE-2021-21309) only affected Ubuntu 18.04 ESM. (CVE-2021-32761, CVE-2021-21309).