Multiple vulnerabilities in libevent
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2017-5437 CVE-2016-10197 CVE-2016-10196 CVE-2016-10195 |
| CWE-ID | CWE-125 CWE-121 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
libevent Universal components / Libraries / Libraries used by multiple products |
| Vendor | libevent |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Out-of-bounds read
EUVDB-ID: #VU6348
Risk: High
CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2017-5437,CVE-2016-10197
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to boundary error in search_make_new() function in evdns.c within libevent library before 2.1.6-beta. A remote attacker can trigger out-of-bounds read and gain access to sensitive system memory.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
MitigationUpdate to version 2.1.6-beta or later.
Vulnerable software versionslibevent: 2.1.6
CPE2.3 External linkshttps://www.openwall.com/lists/oss-security/2017/01/31/17
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.
2) Stack-based buffer overflow
EUVDB-ID: #VU6349
Risk: High
CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2017-5437,CVE-2016-10196
CWE-ID:
CWE-121 - Stack-based buffer overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to boundary error in evutil_parse_sockaddr_port() function in evutil.c within libevent library before 2.1.6-beta. A remote attacker can trigger stack-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
MitigationUpdate to version 2.1.6-beta or later.
Vulnerable software versionslibevent: 2.1.6
CPE2.3 External linkshttps://www.openwall.com/lists/oss-security/2017/01/31/17
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.
3) Out-of-bounds read
EUVDB-ID: #VU6350
Risk: High
CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2017-5437,CVE-2016-10195
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to boundary error in name_parse() function in evdns.c within libevent library before 2.1.6-beta. A remote attacker can trigger out-of-bounds read and gain access to sensitive system memory.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
MitigationUpdate to version 2.1.6-beta or later.
Vulnerable software versionslibevent: 2.1.6
CPE2.3 External linkshttps://www.openwall.com/lists/oss-security/2017/01/31/17
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.
