CURL-CVE-2017-1000100

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Source
https://curl.se/docs/CVE-2017-1000100.html
Import Source
https://curl.se/docs/CURL-CVE-2017-1000100.json
JSON Data
https://api.osv.dev/v1/vulns/CURL-CVE-2017-1000100
Aliases
Published
2017-08-09T08:00:00Z
Modified
2026-05-27T02:29:11.722221Z
Summary
TFTP sends more than buffer size
Details

When doing a TFTP transfer and curl/libcurl is given a URL that contains a long filename (longer than about 515 bytes), the filename is truncated to fit within the buffer boundaries, but the buffer size is still wrongly updated to use the original length. This too large value is then used in the sendto() call, making curl attempt to send more data than what is actually put into the buffer. The sendto() function then reads beyond the end of the heap based buffer.

A malicious HTTP(S) server could redirect a vulnerable libcurl-using client to a crafted TFTP URL (if the client has not restricted which protocols it allows redirects to) and trick it to send private memory contents to a remote server over UDP. Limit curl's redirect protocols with --proto-redir and libcurl's with CURLOPT_REDIR_PROTOCOLS.

Database specific 
{
    "affects": "both",
    "CWE": {
        "desc": "Buffer Over-read",
        "id": "CWE-126"
    },
    "last_affected": "7.54.1",
    "URL": "https://curl.se/docs/CVE-2017-1000100.json",
    "package": "curl",
    "severity": "High",
    "www": "https://curl.se/docs/CVE-2017-1000100.html"
}
References
Credits
    • Even Rouault - FINDER
    • Daniel Stenberg - REMEDIATION_DEVELOPER

Affected packages

Git / github.com/curl/curl.git

Affected ranges

Type
SEMVER
Events
Introduced
7.15.0
Fixed
7.55.0
Type
GIT
Repo
https://github.com/curl/curl.git
Events
Introduced
56d9624b566ac15ffb4b4b6eef220a5000b767e0
Fixed
358b2b131ad6c095696f20dcfa62b8305263f898

Affected versions

7.*
7.15.0
7.15.1
7.15.2
7.15.3
7.15.4
7.15.5
7.16.0
7.16.1
7.16.2
7.16.3
7.16.4
7.17.0
7.17.1
7.18.0
7.18.1
7.18.2
7.19.0
7.19.1
7.19.2
7.19.3
7.19.4
7.19.5
7.19.6
7.19.7
7.20.0
7.20.1
7.21.0
7.21.1
7.21.2
7.21.3
7.21.4
7.21.5
7.21.6
7.21.7
7.22.0
7.23.0
7.23.1
7.24.0
7.25.0
7.26.0
7.27.0
7.28.0
7.28.1
7.29.0
7.30.0
7.31.0
7.32.0
7.33.0
7.34.0
7.35.0
7.36.0
7.37.0
7.37.1
7.38.0
7.39.0
7.40.0
7.41.0
7.42.0
7.42.1
7.43.0
7.44.0
7.45.0
7.46.0
7.47.0
7.47.1
7.48.0
7.49.0
7.49.1
7.50.0
7.50.1
7.50.2
7.50.3
7.51.0
7.52.0
7.52.1
7.53.0
7.53.1
7.54.0
7.54.1
Other
curl-7_15_0
curl-7_15_1
curl-7_15_2
curl-7_15_3
curl-7_15_4
curl-7_15_5
curl-7_15_6-prepipeline
curl-7_16_0
curl-7_16_1
curl-7_16_2
curl-7_16_3
curl-7_16_4
curl-7_17_0
curl-7_17_0-preldapfix
curl-7_17_1
curl-7_18_0
curl-7_18_1
curl-7_18_2
curl-7_19_0
curl-7_19_1
curl-7_19_2
curl-7_19_3
curl-7_19_4
curl-7_19_5
curl-7_19_6
curl-7_19_7
curl-7_20_0
curl-7_20_1
curl-7_21_0
curl-7_21_1
curl-7_21_2
curl-7_21_3
curl-7_21_4
curl-7_21_5
curl-7_21_6
curl-7_21_7
curl-7_22_0
curl-7_23_0
curl-7_23_1
curl-7_24_0
curl-7_25_0
curl-7_26_0
curl-7_27_0
curl-7_28_0
curl-7_28_1
curl-7_29_0
curl-7_30_0
curl-7_31_0
curl-7_32_0
curl-7_33_0
curl-7_34_0
curl-7_35_0
curl-7_36_0
curl-7_37_0
curl-7_37_1
curl-7_38_0
curl-7_39_0
curl-7_40_0
curl-7_41_0
curl-7_42_0
curl-7_42_1
curl-7_43_0
curl-7_44_0
curl-7_45_0
curl-7_46_0
curl-7_47_0
curl-7_47_1
curl-7_48_0
curl-7_49_0
curl-7_49_1
curl-7_50_0
curl-7_50_1
curl-7_50_2
curl-7_50_3
curl-7_51_0
curl-7_52_0
curl-7_52_1
curl-7_53_0
curl-7_53_1
curl-7_54_0
curl-7_54_1

Database specific

vanir_signatures_modified 
"2026-05-27T02:29:11Z"
source 
"https://curl.se/docs/CURL-CVE-2017-1000100.json"
vanir_signatures 
[
    {
        "signature_type": "Line",
        "target": {
            "file": "lib/tftp.c"
        },
        "deprecated": false,
        "signature_version": "v1",
        "id": "CURL-CVE-2017-1000100-072906fe",
        "source": "https://github.com/curl/curl.git/commit/358b2b131ad6c095696f20dcfa62b8305263f898",
        "digest": {
            "line_hashes": [
                "299649190253636648298373704767072212028",
                "295307249874644216177103258783560139928",
                "83874492656159097150290477829949816860",
                "270941083274010498415793508909327083905"
            ],
            "threshold": 0.9
        }
    },
    {
        "signature_type": "Function",
        "target": {
            "function": "tftp_send_first",
            "file": "lib/tftp.c"
        },
        "deprecated": false,
        "signature_version": "v1",
        "id": "CURL-CVE-2017-1000100-c9641619",
        "source": "https://github.com/curl/curl.git/commit/358b2b131ad6c095696f20dcfa62b8305263f898",
        "digest": {
            "function_hash": "279178995567361826597018327790682454261",
            "length": 2738.0
        }
    }
]