CVE-2021-32762

Redis is an open source, in-memory database that persists on disk. 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. This is a result of a vulnerability in the underlying hiredis library which does not perform an overflow check before calling the calloc() heap allocation function. This issue only impacts systems with heap allocators that do not perform their own overflow checks. Most modern systems do and are therefore not likely to be affected. Furthermore, by default redis-sentinel uses the jemalloc allocator which is also not vulnerable. The problem is fixed in Redis versions 6.2.6, 6.0.16 and 5.0.14.

References

Affected packages

Git / github.com/redis/redis

Affected ranges

Type: GIT
Repo: https://github.com/redis/redis
Events: Fixed

0215324a66af949be39b34be2d55143232c1cb71

Introduced

445aa844b946a8f1bc21ac8554b44adb1ecb4018

Fixed

4930d19e70c391750479951022e207e19111eb55

Introduced

17dfd7cabbf7954f92b7a1243d4bb27fee5d4500

Fixed

5895d119b1c2825ff0394f30e246e036c3972bc5

Introduced

882ca6962f4ca32683b0e8db831de1b425c27d3c

Fixed

704ba5f5b22ae1ecafbcfb7a3258311c27ff94ff

Affected versions

5.*

5.0.0

5.0.1

5.0.10

5.0.11

5.0.12

5.0.13

5.0.2

5.0.3

5.0.4

5.0.5

5.0.6

5.0.7

5.0.8

5.0.9

6.*

6.0.0

6.0.1

6.0.10

6.0.11

6.0.12

6.0.13

6.0.14

6.0.15

6.0.2

6.0.3

6.0.4

6.0.5

6.0.6

6.0.7

6.0.8

6.0.9

6.2.0

6.2.1

6.2.2

6.2.3

6.2.4

6.2.5

Database specific

vanir_signatures

[
    {
        "deprecated": false,
        "source": "https://github.com/redis/redis/commit/0215324a66af949be39b34be2d55143232c1cb71",
        "id": "CVE-2021-32762-3e4b08f6",
        "target": {
            "file": "deps/hiredis/test.c",
            "function": "test_reply_reader"
        },
        "digest": {
            "function_hash": "160136926384499477379751229509923238067",
            "length": 6546.0
        },
        "signature_type": "Function",
        "signature_version": "v1"
    },
    {
        "deprecated": false,
        "source": "https://github.com/redis/redis/commit/0215324a66af949be39b34be2d55143232c1cb71",
        "id": "CVE-2021-32762-4ae63639",
        "target": {
            "file": "deps/hiredis/hiredis.c",
            "function": "createArrayObject"
        },
        "digest": {
            "function_hash": "179161735348210698687051920573265359593",
            "length": 581.0
        },
        "signature_type": "Function",
        "signature_version": "v1"
    },
    {
        "deprecated": false,
        "source": "https://github.com/redis/redis/commit/0215324a66af949be39b34be2d55143232c1cb71",
        "id": "CVE-2021-32762-8a67fc88",
        "target": {
            "file": "deps/hiredis/hiredis.c"
        },
        "digest": {
            "line_hashes": [
                "311195162694762926584360255253075821286",
                "34398200280396169294640070927249867179",
                "76188935927609120202871962455023382498",
                "186027357458498207079532665570846242970"
            ],
            "threshold": 0.9
        },
        "signature_type": "Line",
        "signature_version": "v1"
    },
    {
        "deprecated": false,
        "source": "https://github.com/redis/redis/commit/0215324a66af949be39b34be2d55143232c1cb71",
        "id": "CVE-2021-32762-c084ea7c",
        "target": {
            "file": "deps/hiredis/test.c"
        },
        "digest": {
            "line_hashes": [
                "2960801188689279389740907912361228292",
                "103680156091366763705168315892522468615",
                "313519843436751110082004899014515685551"
            ],
            "threshold": 0.9
        },
        "signature_type": "Line",
        "signature_version": "v1"
    }
]

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-32762.json"