Vulnerabilities
Misconfiguration
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CVE Vulnerabilities

CVE-2016-5421

Use After Free

Published: Aug 10, 2016 | Modified: Apr 12, 2025
CVSS 3.x
8.1
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
6.8 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P
RedHat/V2
6.2 MODERATE
AV:L/AC:H/Au:N/C:C/I:C/A:C
RedHat/V3
8.1 MODERATE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2016-5421
CWEhttps://cwe.mitre.org/data/definitions/416.html

Use-after-free vulnerability in libcurl before 7.50.1 allows attackers to control which connection is used or possibly have unspecified other impact via unknown vectors.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

NameVendorStart VersionEnd Version
LeapOpensuse42.1 (including)42.1 (including)
Red Hat Software Collections for Red Hat Enterprise Linux 6RedHathttpd24-curl-0:7.61.1-1.el6*
Red Hat Software Collections for Red Hat Enterprise Linux 6RedHathttpd24-httpd-0:2.4.34-7.el6*
Red Hat Software Collections for Red Hat Enterprise Linux 6RedHathttpd24-nghttp2-0:1.7.1-7.el6*
Red Hat Software Collections for Red Hat Enterprise Linux 7RedHathttpd24-curl-0:7.61.1-1.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7RedHathttpd24-httpd-0:2.4.34-7.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7RedHathttpd24-nghttp2-0:1.7.1-7.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSRedHathttpd24-curl-0:7.61.1-1.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSRedHathttpd24-httpd-0:2.4.34-7.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSRedHathttpd24-nghttp2-0:1.7.1-7.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSRedHathttpd24-curl-0:7.61.1-1.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSRedHathttpd24-httpd-0:2.4.34-7.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSRedHathttpd24-nghttp2-0:1.7.1-7.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSRedHathttpd24-curl-0:7.61.1-1.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSRedHathttpd24-httpd-0:2.4.34-7.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSRedHathttpd24-nghttp2-0:1.7.1-7.el7*
CurlUbuntuesm-infra-legacy/trusty*
CurlUbuntuesm-infra/xenial*
CurlUbuntutrusty*
CurlUbuntutrusty/esm*
CurlUbuntuupstream*
CurlUbuntuvivid/stable-phone-overlay*
CurlUbuntuvivid/ubuntu-core*
CurlUbuntuxenial*

Potential Mitigations

References

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