#VU33020 Out-of-bounds read in cURL - CVE-2016-8621

Vulnerability identifier: #VU33020

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-8621

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
cURL
Client/Desktop applications / Other client software

Vendor: curl.haxx.se

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

The `curl_getdate` function in curl before version 7.51.0 is vulnerable to an out of bounds read if it receives an input with one digit short.

Mitigation
Install update from vendor's website.

Vulnerable software versions

cURL: 7.1 - 7.50.3

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External links
https://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
https://www.securityfocus.com/bid/94101
https://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-2016-8621
https://curl.haxx.se/CVE-2016-8621.patch
https://curl.haxx.se/docs/adv_20161102G.html
https://security.gentoo.org/glsa/201701-47
https://www.tenable.com/security/tns-2016-21

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.