CURL-CVE-2016-5420

Source
https://curl.se/docs/CVE-2016-5420.html
Import Source
https://curl.se/docs/CURL-CVE-2016-5420.json
JSON Data
https://api.osv.dev/v1/vulns/CURL-CVE-2016-5420
Aliases
Published
2016-08-03T08:00:00Z
Modified
2024-06-07T13:53:51Z
Summary
Re-using connections with wrong client cert
Details

libcurl did not consider client certificates when reusing TLS connections.

libcurl supports reuse of established connections for subsequent requests. It does this by keeping a few previous connections "alive" in a connection pool so that a subsequent request that can use one of them instead of creating a new connection.

When using a client certificate for a connection that was then put into the connection pool, that connection could then wrongly get reused in a subsequent request to that same server that either did not use a client certificate at all or that asked to use a different client certificate thus trying to tell the user that it is a different entity.

This mistakenly using the wrong connection could of course lead to applications sending requests to the wrong realms of the server using authentication that it was not supposed to have for those operations.

Database specific
{
    "CWE": {
        "id": "CWE-305",
        "desc": "Authentication Bypass by Primary Weakness"
    },
    "package": "curl",
    "URL": "https://curl.se/docs/CVE-2016-5420.json",
    "severity": "Medium",
    "www": "https://curl.se/docs/CVE-2016-5420.html",
    "last_affected": "7.50.0"
}
References
Credits
    • the curl security team - FINDER
    • Daniel Stenberg - REMEDIATION_DEVELOPER

Affected packages

Git /

Affected ranges

Type
SEMVER
Events
Introduced
7.7
Fixed
7.50.1

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
7.39.0
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
7.7
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