#VU66916 Heap-based buffer overflow in libcurl - CVE-2013-2174

Vulnerability identifier: #VU66916

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2013-2174

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libcurl
Universal components / Libraries / Libraries used by multiple products

Vendor: curl.haxx.se

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the "curl_easy_unescape" function. A remote attacker can pass specially crafted data to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libcurl: 7.7 - 7.30.0

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External links
https://curl.haxx.se/docs/adv_20130622.html
https://lists.opensuse.org/opensuse-updates/2013-07/msg00013.html
https://rhn.redhat.com/errata/RHSA-2013-0983.html
https://www.debian.org/security/2013/dsa-2713
https://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
https://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
https://www.securityfocus.com/bid/60737
https://www.ubuntu.com/usn/USN-1894-1
https://github.com/bagder/curl/commit/192c4f788d48f82c03e9cef40013f34370e90737

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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.