PT-2015-7739 · Ntf+7 · Ntp+11
Jonathan Gardner
·
Publicado
2015-12-31
·
Atualizado
2024-06-15
·
CVE-2015-8138
CVSS v3.1
5.3
Média
| Vetor | AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
Name of the Vulnerable Software and Affected Versions
NTP versions 4.2.8p6 and earlier, NTP versions 4.3.x before 4.3.90
NTP (affected versions not specified) in multiple Cisco products
Description
The issue allows remote attackers to bypass the origin timestamp validation via a packet with an origin timestamp set to zero, potentially causing a denial of service (DoS) condition or modifying the time being advertised by a device acting as a Network Time Protocol (NTP) server. This vulnerability exposes the possibility of a logic error.
Recommendations
For NTP versions 4.2.8p6 and earlier, update to version 4.2.8p6 or later.
For NTP versions 4.3.x before 4.3.90, update to version 4.3.90 or later.
For NTP in multiple Cisco products, refer to the Cisco bug for each affected product for available workarounds.
As a temporary workaround, consider restricting access to the NTP service to minimize the risk of exploitation.
Exploit
Correção
DoS
RCE
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Produtos afetados
Alt Linux
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Cisco
Cisco Ios
Cisco Ios Xe
Cisco Ios Xr
Cisco Nexus
Freebsd
Ntp
Red Hat
Suse
Ubuntu