CURL-CVE-2016-8623

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Source
https://curl.se/docs/CVE-2016-8623.html
Import Source
https://curl.se/docs/CURL-CVE-2016-8623.json
JSON Data
https://api.test.osv.dev/v1/vulns/CURL-CVE-2016-8623
Aliases
Published
2016-11-02T08:00:00Z
Modified
2026-05-29T05:40:50.169729Z
Summary
Use after free via shared cookies
Details

libcurl explicitly allows users to share cookies between multiple easy handles that are concurrently employed by different threads.

When cookies to be sent to a server are collected, the matching function collects all cookies to send and the cookie lock is released immediately afterwards. That function however only returns a list with references back to the original strings for name, value, path and so on. Therefore, if another thread quickly takes the lock and frees one of the original cookie structs together with its strings, a use after free can occur and lead to information disclosure. Another thread can also replace the contents of the cookies from separate HTTP responses or API calls.

Database specific 
{
    "affects": "lib",
    "CWE": {
        "id": "CWE-416",
        "desc": "Use After Free"
    },
    "severity": "High",
    "package": "curl",
    "URL": "https://curl.se/docs/CVE-2016-8623.json",
    "last_affected": "7.50.3",
    "www": "https://curl.se/docs/CVE-2016-8623.html"
}
References
Credits
    • Cure53 - FINDER
    • Daniel Stenberg - REMEDIATION_DEVELOPER

Affected packages

Git / github.com/curl/curl.git

Affected ranges

Type
SEMVER
Events
Introduced
7.10.7
Fixed
7.51.0
Type
GIT
Repo
https://github.com/curl/curl.git
Events
Introduced
41ae97e710f728495a1d6adba6476c21b94c4881
Fixed
c5be3d7267c725dbd093ff3a883e07ee8cf2a1d5

Affected versions

7.*
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
7.39.0
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_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_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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    {
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    }
]
source 
"https://curl.se/docs/CURL-CVE-2016-8623.json"
vanir_signatures_modified 
"2026-05-29T05:40:50Z"