Amazon Linux AMI update for net-snmp

1) Remote code execution

EUVDB-ID: #VU2215

Risk: High

CVSSv4.0: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2015-5621

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.

The weakness exists due to the snmp_pdu_parse function in snmp_api.c does not remove the varBind variable in a netsnmp_variable_list item when parsing of the SNMP PDU fails. A remote attacker can supply specially crafted input and cause denial of service or execute arbitrary code with elevated privileges.

Mitigation

Update the affected packages.

i686:
    net-snmp-devel-5.5-54.1.20.amzn1.i686
    net-snmp-libs-5.5-54.1.20.amzn1.i686
    net-snmp-utils-5.5-54.1.20.amzn1.i686
    net-snmp-python-5.5-54.1.20.amzn1.i686
    net-snmp-debuginfo-5.5-54.1.20.amzn1.i686
    net-snmp-5.5-54.1.20.amzn1.i686
    net-snmp-perl-5.5-54.1.20.amzn1.i686

src:
    net-snmp-5.5-54.1.20.amzn1.src

x86_64:
    net-snmp-libs-5.5-54.1.20.amzn1.x86_64
    net-snmp-5.5-54.1.20.amzn1.x86_64
    net-snmp-python-5.5-54.1.20.amzn1.x86_64
    net-snmp-debuginfo-5.5-54.1.20.amzn1.x86_64
    net-snmp-perl-5.5-54.1.20.amzn1.x86_64
    net-snmp-utils-5.5-54.1.20.amzn1.x86_64
    net-snmp-devel-5.5-54.1.20.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*

External links

https://alas.aws.amazon.com/ALAS-2015-590.html

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.