CVE-2016-8616

LOWEPSS 88th pctl

3.7

CVSS v3

Description

A flaw was found in curl before version 7.51.0 When re-using a connection, curl was doing case insensitive comparisons of user name and password with the existing connections. This means that if an unused connection with proper credentials exists for a protocol that has connection-scoped credentials, an attacker can cause that connection to be reused if s/he knows the case-insensitive version of the correct password.

CWE-592 CWE-255

How to fix

Remediation Available

curlDebian

Fixed in:7.51.0-1CVE-2016-8616

curlUbuntu

Fixed in:7.35.0-1ubuntu2.10USN-3123-1

Fixed in:7.47.0-1ubuntu2.2USN-3123-1

libcurl3Ubuntu

Fixed in:7.35.0-1ubuntu2.10USN-3123-1

Fixed in:7.47.0-1ubuntu2.2USN-3123-1

libcurl3-gnutlsUbuntu

Fixed in:7.35.0-1ubuntu2.10USN-3123-1

Fixed in:7.47.0-1ubuntu2.2USN-3123-1

libcurl3-nssUbuntu

Fixed in:7.35.0-1ubuntu2.10USN-3123-1

Fixed in:7.47.0-1ubuntu2.2USN-3123-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Exploit Intelligence

3.47%probability of exploitation in 30 days

88thpercentile

Elevated risk: more likely to be exploited than 88% of all known CVEs.

References

Patch4

Third-Party Advisory6

Related Vulnerabilities

Other CWE-592 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2018-10933	Critical	9.1	92%	-	Fix
CVE-2016-8371	High	7.3	11%	-	-
CVE-2018-14643	Critical	9.8	6.1%	-	-
CVE-2014-5432	Critical	9.8	2.6%	-	-
CVE-2018-1085	Critical	9.0	2.2%	-	Fix
CVE-2017-2684	Critical	9.0	2.0%	-	-

Common questions

How do I fix CVE-2016-8616?

Published advisories record a fix for 5 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2016-8616 being actively exploited?

Not that we know of. CVE-2016-8616 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 3.5% is the estimated probability that it will be exploited in the next 30 days. That is higher than 88% of all scored CVEs.

How severe is CVE-2016-8616?

CVE-2016-8616 has a CVSS v3 base score of 3.7, rated low. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2016-8616 affect?

Published advisories record a fix for curl (Debian), curl (Ubuntu), libcurl3 (Ubuntu), libcurl3-gnutls (Ubuntu), and 1 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.