libevent up to 2.1.5 evdns.c search_make_new Hostname out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability was found in libevent up to 2.1.5 and classified as critical. Affected is the function search_make_new of the file evdns.c. The manipulation of the argument Hostname results in out-of-bounds. This vulnerability is known as CVE-2016-10197. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in libevent up to 2.1.5. Affected is the function search_make_new of the file evdns.c. The manipulation of the argument hostname with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The search_make_new function in evdns.c in libevent before 2.1.6-beta allows attackers to cause a denial of service (out-of-bounds read) via an empty hostname.

The bug was discovered 01/31/2017. The weakness was published 03/15/2017 by Guido Vranken (oss-sec). The advisory is available at openwall.com. This vulnerability is traded as CVE-2016-10197 since 02/01/2017. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 15 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 97195 (Debian DLA-824-1 : libevent security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196725 (Ubuntu Security Notification for Libevent Vulnerabilities (USN-3228-1)).

Upgrading to version 2.1.6-beta eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (97195), SecurityFocus (BID 96014†) and SecurityTracker (ID 1038320†). Similar entries are available at VDB-98128 and VDB-98129. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 97195
Nessus Name: Debian DLA-824-1 : libevent security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703789
OpenVAS Name: Debian Security Advisory DSA 3789-1 (libevent - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: libevent 2.1.6-beta

Timelineinfo

01/31/2017 🔍
01/31/2017 +0 days 🔍
02/01/2017 +1 days 🔍
02/15/2017 +14 days 🔍
02/16/2017 +1 days 🔍
03/15/2017 +27 days 🔍
03/15/2017 +0 days 🔍
03/16/2017 +1 days 🔍
02/01/2025 +2879 days 🔍

Sourcesinfo

Product: github.com

Advisory: openwall.com
Researcher: Guido Vranken
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-10197 (🔍)
GCVE (CVE): GCVE-0-2016-10197
GCVE (VulDB): GCVE-100-98130

OVAL: 🔍

SecurityFocus: 96014 - libevent Multiple Security Vulnerabilities
OSVDB: - CVE-2016-10197 - libevent - Out-of-Bounds Read Issue
SecurityTracker: 1038320

See also: 🔍

Entryinfo

Created: 03/16/2017 13:29
Updated: 02/01/2025 21:59
Changes: 03/16/2017 13:29 (81), 09/08/2020 12:57 (3), 02/01/2025 21:59 (20)
Complete: 🔍
Cache ID: 216:485:103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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