CVE-2017-1000254

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Source
https://cve.org/CVERecord?id=CVE-2017-1000254
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2017-1000254.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2017-1000254
Aliases
Downstream
Related
Published
2017-10-06T13:29:00.207Z
Modified
2026-07-07T08:49:28.353270994Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

libcurl may read outside of a heap allocated buffer when doing FTP. When libcurl connects to an FTP server and successfully logs in (anonymous or not), it asks the server for the current directory with the PWD command. The server then responds with a 257 response containing the path, inside double quotes. The returned path name is then kept by libcurl for subsequent uses. Due to a flaw in the string parser for this directory name, a directory name passed like this but without a closing double quote would lead to libcurl not adding a trailing NUL byte to the buffer holding the name. When libcurl would then later access the string, it could read beyond the allocated heap buffer and crash or wrongly access data beyond the buffer, thinking it was part of the path. A malicious server could abuse this fact and effectively prevent libcurl-based clients to work with it - the PWD command is always issued on new FTP connections and the mistake has a high chance of causing a segfault. The simple fact that this has issue remained undiscovered for this long could suggest that malformed PWD responses are rare in benign servers. We are not aware of any exploit of this flaw. This bug was introduced in commit 415d2e7cb7, March 2005. In libcurl version 7.56.0, the parser always zero terminates the string but also rejects it if not terminated properly with a final double quote.

References

Affected packages

Git / github.com/curl/curl

Affected ranges

Type
GIT
Repo
https://github.com/curl/curl
Events
Introduced
546572da0457f37c698c02d0a08d90fdfcbeedec
Last affected
8839c05fba1f8415eec17eff8ac60cc3a50eb51e
Database specific 
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        "cpe:2.3:a:haxx:libcurl:7.21.2:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.21.3:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.21.4:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.21.5:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.21.6:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.21.7:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.22.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.23.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.23.1:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.24.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.25.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.26.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.27.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.28.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.28.1:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.29.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.30.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.31.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.32.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.33.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.34.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.35.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.36.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.37.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.37.1:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.38.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.39:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.40.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.41.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.42.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.42.1:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.43.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.44.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.45.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.46.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.47.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.47.1:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.48.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.49.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.49.1:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.50.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.50.1:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.50.2:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.50.3:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.51.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.52.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.52.1:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.53.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.53.1:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.54.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.54.1:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.55.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:haxx:libcurl:7.55.1:*:*:*:*:*:*:*"
    ],
    "source": "CPE_STRING"
}

Affected versions

7.*
7.10
7.10.1
7.10.2
7.10.3
7.10.4
7.10.5
7.10.6
7.10.7
7.10.8
7.11.0
7.11.1
7.11.2
7.12.0
7.12.1
7.12.2
7.12.3
7.13.0
7.13.1
7.13.2
7.14.0
7.14.1
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
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
7.55.0
7.55.1
7.7
7.7.1
7.7.2
7.7.3
7.8
7.8.1
7.9
7.9.1
7.9.2
7.9.3
7.9.4
7.9.5
7.9.6
7.9.7
7.9.8
Other
before_ftp_statemachine
before_urldata_rename
curl-7_10
curl-7_10_1
curl-7_10_2
curl-7_10_3
curl-7_10_4
curl-7_10_5
curl-7_10_6
curl-7_10_7
curl-7_10_8
curl-7_11_0
curl-7_11_1
curl-7_11_2
curl-7_12_0
curl-7_12_1
curl-7_12_2
curl-7_12_3
curl-7_13_0
curl-7_13_1
curl-7_13_2
curl-7_14_0
curl-7_14_1
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_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_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
curl-7_55_0
curl-7_55_1
curl-7_7
curl-7_7_1
curl-7_7_2
curl-7_7_3
curl-7_8
curl-7_8-pre2
curl-7_8_1
curl-7_8_1-pre3
curl-7_9
curl-7_9_1
curl-7_9_2
curl-7_9_3
curl-7_9_3-pre1
curl-7_9_3-pre2
curl-7_9_3-pre3
curl-7_9_4
curl-7_9_5
curl-7_9_5-pre2
curl-7_9_5-pre4
curl-7_9_6
curl-7_9_7
curl-7_9_7-pre2
curl-7_9_8

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2017-1000254.json"