CURL-CVE-2016-8625

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Source
https://curl.se/docs/CVE-2016-8625.html
Import Source
https://curl.se/docs/CURL-CVE-2016-8625.json
JSON Data
https://api.test.osv.dev/v1/vulns/CURL-CVE-2016-8625
Aliases
Published
2016-11-02T08:00:00Z
Modified
2026-05-29T05:40:49.871150Z
Summary
IDNA 2003 makes curl use wrong host
Details

When curl is built with libidn to handle International Domain Names (IDNA), it translates them to puny code for DNS resolving using the IDNA 2003 standard, while IDNA 2008 is the modern and up-to-date IDNA standard.

This misalignment causes problems with for example domains using the German ß character (known as the Unicode Character LATIN SMALL LETTER SHARP S) which is used at times in the .de TLD and is translated differently in the two IDNA standards, leading to users potentially and unknowingly issuing network transfer requests to the wrong host.

For example, straße.de is translated into strasse.de using IDNA 2003 but is translated into xn--strae-oqa.de using IDNA 2008. Needless to say, those hostnames could well resolve to different addresses and be two completely independent servers. IDNA 2008 is mandatory for .de domains.

curl is not alone with this problem, as there is currently a big flux in the world of network user-agents about which IDNA version to support and use.

This name problem exists for DNS-using protocols in curl, but only when built to use libidn.

Database specific 
{
    "affects": "both",
    "CWE": {
        "id": "CWE-838",
        "desc": "Inappropriate Encoding for Output Context"
    },
    "severity": "High",
    "package": "curl",
    "URL": "https://curl.se/docs/CVE-2016-8625.json",
    "last_affected": "7.50.3",
    "www": "https://curl.se/docs/CVE-2016-8625.html"
}
References
Credits
    • Christian Heimes - FINDER
    • Daniel Stenberg - REMEDIATION_DEVELOPER

Affected packages

Git / github.com/curl/curl.git

Affected ranges

Type
SEMVER
Events
Introduced
7.12.0
Fixed
7.51.0
Type
GIT
Repo
https://github.com/curl/curl.git
Events
Introduced
9631fa740708b1890197fad01e25b34b7e8eb80e
Fixed
9c91ec778104ae3b744b39444d544e82d5ee9ece

Affected versions

7.*
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
7.39.0
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
Other
before_ftp_statemachine
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_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

Database specific

vanir_signatures 
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source 
"https://curl.se/docs/CURL-CVE-2016-8625.json"
vanir_signatures_modified 
"2026-05-29T05:40:49Z"