CURL-CVE-2015-3153

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Source
https://curl.se/docs/CVE-2015-3153.html
Import Source
https://curl.se/docs/CURL-CVE-2015-3153.json
JSON Data
https://api.osv.dev/v1/vulns/CURL-CVE-2015-3153
Aliases
Published
2015-04-29T08:00:00Z
Modified
2026-05-27T02:29:39.446389Z
Summary
sensitive HTTP server headers also sent to proxies
Details

libcurl provides applications a way to set custom HTTP headers to be sent to the server by using CURLOPT_HTTPHEADER. A similar option is available for the curl command-line tool with the '--header' option.

When the connection passes through an HTTP proxy the same set of headers is sent to the proxy as well by default. While this is by design, it has not necessarily been clear nor understood by application programmers.

Such tunneling over a proxy is done for example when using the HTTPS protocol - or when explicitly asked for. In this case, the initial connection to the proxy is made in clear including any custom headers using the HTTP CONNECT method.

While libcurl provides the CURLOPT_HEADEROPT option to allow applications to tell libcurl if the headers should be sent to host and the proxy or use separate lists to the different destinations, it has still defaulted to sending the same headers to both parties for the sake of compatibility.

If the application sets a custom HTTP header with sensitive content (e.g., authentication cookies) without changing the default, the proxy, and anyone who listens to the traffic between the application and the proxy, might get access to those values.

Note: this problem does not exist when using the CURLOPT_COOKIE option (or the --cookie option) or the HTTP auth options, which are always sent only to the destination server.

Database specific 
{
    "severity": "High",
    "www": "https://curl.se/docs/CVE-2015-3153.html",
    "CWE": {
        "id": "CWE-201",
        "desc": "Information Exposure Through Sent Data"
    },
    "URL": "https://curl.se/docs/CVE-2015-3153.json",
    "affects": "both",
    "package": "curl",
    "last_affected": "7.42.0"
}
References
Credits
    • Yehezkel Horowitz - FINDER
    • Oren Souroujon - FINDER
    • Daniel Stenberg - REMEDIATION_DEVELOPER

Affected packages

Git / github.com/curl/curl.git

Affected ranges

Type
SEMVER
Events
Introduced
4.0
Fixed
7.42.1
Type
GIT
Repo
https://github.com/curl/curl.git
Events
Introduced
ae1912cb0d494b48d514d937826c9fe83ec96c4d
Fixed
6ba2e88a642434bd0ffa95465e4a7d034d03ea10
Fixed
69a2e8d7ec581695a62527cb2252e7350f314ffa

Affected versions

4.*
4.0
4.1
4.10
4.2
4.3
4.4
4.5
4.5.1
4.6
4.7
4.8
4.8.1
4.8.2
4.8.3
4.8.4
4.9
5.*
5.0
5.10
5.11
5.2
5.2.1
5.3
5.4
5.5
5.5.1
5.7
5.7.1
5.8
5.9
5.9.1
6.*
6.0
6.1
6.2
6.3
6.3.1
6.4
6.5
6.5.1
6.5.2
7.*
7.1
7.1.1
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
7.2
7.2.1
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
7.3
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
7.4
7.4.1
7.4.2
7.40.0
7.41.0
7.42.0
7.5
7.5.1
7.5.2
7.6
7.6.1
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-6_5
curl-6_5_1
curl-6_5_2
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_1_1
curl-7_2
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_3
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_4_1
curl-7_5
curl-7_5_2
curl-7_6
curl-7_6-pre4
curl-7_6_1
curl-7_6_1-pre1
curl-7_6_1-pre2
curl-7_6_1-pre3
curl-7_7
curl-7_7-beta1
curl-7_7-beta2
curl-7_7-beta3
curl-7_7-beta5
curl-7_7_1
curl-7_7_2
curl-7_7_3
curl-7_7_alpha2
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
curl_7_6-pre3

Database specific

source 
"https://curl.se/docs/CURL-CVE-2015-3153.json"
vanir_signatures_modified 
"2026-05-27T02:29:39Z"
vanir_signatures 
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]