PT-2016-4581 · Libevent+4 · Libevent+4

Guido Vranken · Published 2016-12-31 · Updated 2022-01-31 · CVE-2016-10195

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions libevent versions prior to 2.1.6-beta

Description The issue is related to the name parse function in evdns.c, which allows remote attackers to have an unspecified impact via vectors involving the label len variable. This triggers an out-of-bounds stack read.

Recommendations For versions prior to 2.1.6-beta, update to version 2.1.6-beta or later to resolve the issue. As a temporary workaround, consider restricting access to the name parse function in evdns.c to minimize the risk of exploitation.

Exploit

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CESA-2017_1104

CESA-2017_1106

CESA-2017_1201

CVE-2016-10195

DLA-824-1

DSA-3789-1

MGASA-2017-0066

RHSA-2017:1104

RHSA-2017:1106

RHSA-2017:1201

RHSA-2017_1104

RHSA-2017_1106

RHSA-2017_1201

SUSE-SU-2018:0200-1

SUSE-SU-2018:0263-1

SUSE-SU-2018_0200-1

SUSE-SU-2018_0263-1

USN-3228-1

USN-3278-1

Affected Products

Centos

Red Hat

Suse

Ubuntu

Libevent

References · 74

• 🔥 https://github.com/libevent/libevent/issues/317 · Exploit
• https://github.com/libevent/libevent/commit/96f64a022014a208105ead6c8a7066018449d86d · Patch
• https://ubuntu.com/security/CVE-2017-5440 · Vendor Advisory
• https://osv.dev/vulnerability/USN-3228-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-10196 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-5444 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-5451 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-5430 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2017-13 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-5466 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2018:0263-1 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2017-1201.html · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2016-10195 · Security Note
• https://osv.dev/vulnerability/CVE-2016-10195 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-5445 · Vendor Advisory