CVE-2016-8622

critical
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Description

The URL percent-encoding decode function in libcurl before 7.51.0 is called `curl_easy_unescape`. Internally, even if this function would be made to allocate a unscape destination buffer larger than 2GB, it would return that new length in a signed 32 bit integer variable, thus the length would get either just truncated or both truncated and turned negative. That could then lead to libcurl writing outside of its heap based buffer.

References

http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html

http://www.securityfocus.com/bid/94105

http://www.securitytracker.com/id/1037192

https://access.redhat.com/errata/RHSA-2018:2486

https://access.redhat.com/errata/RHSA-2018:3558

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8622

https://curl.haxx.se/docs/adv_20161102H.html

https://security.gentoo.org/glsa/201701-47

https://www.tenable.com/security/tns-2016-21

Details

Source: MITRE

Published: 2018-07-31

Updated: 2018-11-13

Type: CWE-787

Risk Information

CVSS v2

Base Score: 7.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 10

Severity: HIGH

CVSS v3

Base Score: 9.8

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

Impact Score: 5.9

Exploitability Score: 3.9

Severity: CRITICAL

Vulnerable Software

Configuration 1

OR

cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*

Tenable Plugins

View all (20 total)

IDNameProductFamilySeverity
131701Juniper Junos Space < 19.2R1 Multiple Vulnerabilities (JSA10951)NessusJunos Local Security Checks
critical
125380Oracle Linux 6 / 7 : curl (ELSA-2019-4652)NessusOracle Linux Local Security Checks
critical
125002EulerOS Virtualization 3.0.1.0 : curl (EulerOS-SA-2019-1549)NessusHuawei Local Security Checks
critical
99930Oracle Secure Global Desktop Multiple Vulnerabilities (April 2017 CPU) (SWEET32)NessusMisc.
critical
99881EulerOS 2.0 SP1 : curl (EulerOS-SA-2017-1036)NessusHuawei Local Security Checks
critical
99880EulerOS 2.0 SP2 : curl (EulerOS-SA-2017-1035)NessusHuawei Local Security Checks
critical
96644GLSA-201701-47 : cURL: Multiple vulnerabilitiesNessusGentoo Local Security Checks
critical
95917macOS 10.12.x < 10.12.2 Multiple VulnerabilitiesNessusMacOS X Local Security Checks
high
9826cURL/libcurl 7.x < 7.51.0 Multiple VulnerabilitiesNessus Network MonitorWeb Clients
high
95009Fedora 25 : curl (2016-89769648a0)NessusFedora Local Security Checks
critical
94941Debian DLA-711-1 : curl security updateNessusDebian Local Security Checks
critical
94752openSUSE Security Update : curl (openSUSE-2016-1280)NessusSuSE Local Security Checks
critical
94686Amazon Linux AMI : curl (ALAS-2016-766)NessusAmazon Linux Local Security Checks
critical
94592Fedora 24 : curl (2016-e8e8cdb4ed)NessusFedora Local Security Checks
critical
94588Debian DSA-3705-1 : curl - security updateNessusDebian Local Security Checks
critical
94574Ubuntu 12.04 LTS / 14.04 LTS / 16.04 LTS / 16.10 : curl vulnerabilities (USN-3123-1)NessusUbuntu Local Security Checks
critical
94572SUSE SLES11 Security Update : curl (SUSE-SU-2016:2714-1)NessusSuSE Local Security Checks
critical
94516Slackware 13.0 / 13.1 / 13.37 / 14.0 / 14.1 / 14.2 / current : curl (SSA:2016-308-01)NessusSlackware Local Security Checks
critical
94506SUSE SLED12 / SLES12 Security Update : curl (SUSE-SU-2016:2699-1)NessusSuSE Local Security Checks
critical
94493FreeBSD : cURL -- multiple vulnerabilities (765feb7d-a0d1-11e6-a881-b499baebfeaf)NessusFreeBSD Local Security Checks
critical