CVE-2021-41099

Redis is an open source, in-memory database that persists on disk. 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. The vulnerability involves changing the default proto-max-bulk-len configuration parameter to a very large value and constructing specially crafted network payloads or commands. The problem is fixed in Redis versions 6.2.6, 6.0.16 and 5.0.14. An additional workaround to mitigate the problem without patching the redis-server executable is to prevent users from modifying the proto-max-bulk-len configuration parameter. This can be done using ACL to restrict unprivileged users from using the CONFIG SET command.

References

Affected packages

Git / github.com/redis/redis

Affected ranges

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

0 Unknown introduced commit / All previous commits are affected

Fixed

c6ad876774f3cc11e32681ea02a2eead00f2c521

Affected versions

1.*

1.3.6

2.*

2.2-alpha0

2.2-alpha1

2.2-alpha2

2.2-alpha3

2.2-alpha4

2.2-alpha5

2.2-alpha6

2.2.0-rc1

2.3-alpha0

3.*

3.0-alpha0

6.*

6.0-rc1

6.0-rc2

6.0-rc3

6.0-rc4

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

v1.*

v1.3.10

v1.3.11

v1.3.12

v1.3.7

v1.3.8

v1.3.9

v2.*

v2.0.0-rc1

v2.1.1-watch

Other

vm-playpen

with-deprecated-diskstore

Database specific

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    "vanir_signatures": [
        {
            "source": "https://github.com/redis/redis/commit/c6ad876774f3cc11e32681ea02a2eead00f2c521",
            "signature_type": "Function",
            "digest": {
                "function_hash": "263861364008006447214780027011360238435",
                "length": 942.0
            },
            "id": "CVE-2021-41099-2f2cc239",
            "target": {
                "file": "src/sds.c",
                "function": "sdsMakeRoomFor"
            },
            "deprecated": false,
            "signature_version": "v1"
        },
        {
            "source": "https://github.com/redis/redis/commit/c6ad876774f3cc11e32681ea02a2eead00f2c521",
            "signature_type": "Line",
            "digest": {
                "threshold": 0.9,
                "line_hashes": [
                    "31536250721424773439476737733983893446",
                    "31197297887750876145814346369914935386",
                    "39782041488683852462795552339368336124",
                    "255983622827330638827926300774193340040",
                    "309820509046219063941975706467352758695",
                    "286030179085042204311616100187563677535",
                    "193805607634471009234474877719107780862",
                    "279261928145133411651342465917023710",
                    "6004469484989770357786140015489948933",
                    "203936674237281946377878053125284052193",
                    "211058563121424472077369282767486457083",
                    "277457461090499370348233262450936527982"
                ]
            },
            "id": "CVE-2021-41099-e5ae2ecc",
            "target": {
                "file": "src/sds.c"
            },
            "deprecated": false,
            "signature_version": "v1"
        }
    ]
}