CVE-2021-32626 — Heap-based Buffer Overflow in Redis

CWE-122 — Heap-based Buffer OverflowCWE-787 — Out-of-bounds Write9 documents8 sources
Severity
8.8HIGHNVD
CNA7.5
EPSS
0.8%
top 26.12%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
RedisDebian LinuxFedoraproject Fedora+1 more
Timeline
PublishedOct 4
Latest updateAug 3

Description

Redis is an open source, in-memory database that persists on disk. In affected versions 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. This problem exists in all versions of Redis with Lua scripting support, starting from 2.6. The problem is fixed in versions 6.2.6, 6.0.16 and 5.0.14. For users unable to update an addition…

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages5 packages

▶NVDredis/redis2.6 — 5.0.14+2
▶Debianredis/redis< 5:6.0.16-1+deb11u1+3
▶Ubunturedis/redis< 2:2.8.4-2ubuntu0.2+esm2+3
▶CVEListV5redis/redis>= 2.6.0, < 5.0.14, >= 6.0.0, < 6.0.16, >= 6.2.0, < 6.2.6+2

Also affects: Debian Linux 10.0, 11.0, Fedora 33, 34, 35

Patches

Patch: github.com ↗Patch: www.oracle.com ↗Patch: github.com ↗

🔴Vulnerability Details

3
OSV
redis vulnerabilities↗2022-08-03
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CVEList
Lua scripts can overflow the heap-based Lua stack in Redis↗2021-10-04
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OSV
CVE-2021-32626: Redis is an open source, in-memory database that persists on disk↗2021-10-04
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📋Vendor Advisories

5
Ubuntu
Redis vulnerabilities↗2022-08-03
▶
Oracle
Oracle Oracle Communications Risk Matrix: FDP (Redis) — CVE-2021-32626↗2022-04-15
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Microsoft
Lua scripts can overflow the heap-based Lua stack in Redis↗2021-10-12
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Red Hat
redis: Lua scripts can overflow the heap-based Lua stack↗2021-10-04
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Debian
CVE-2021-32626: redis - Redis is an open source, in-memory database that persists on disk. In affected v...↗2021
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