CVE-2021-31800

Multiple path traversal vulnerabilities exist in smbserver.py in Impacket through 0.9.22. An attacker that connects to a running smbserver instance can list and write to arbitrary files via ../ directory traversal. This could potentially be abused to achieve arbitrary code execution by replacing /etc/shadow or an SSH authorized key.

References

Affected packages

Git / github.com/fortra/impacket

Affected ranges

Type

GIT

Repo

https://github.com/fortra/impacket

Events

Introduced

Last affected

2438fb66cea4c6a9b4a04939e1ef9c4208d60134

Fixed

49c643bf66620646884ed141c94e5fdd85bcdd2f

Database specific

{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "0.9.22"
        }
    ]
}

Affected versions

Other

impacket_0_9_13

impacket_0_9_14

impacket_0_9_15

impacket_0_9_17

impacket_0_9_18

impacket_0_9_19

impacket_0_9_20

impacket_0_9_21

impacket_0_9_22

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-31800.json"

unresolved_ranges

[
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "32"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "33"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "34"
            }
        ]
    }
]