Amazon Linux AMI update for squid

Published: 2019-03-26 | Updated: 2019-05-22

Risk	Medium
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2018-19132
CWE-ID	CWE-401
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Amazon Linux AMI Operating systems & Components / Operating system
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Memory leak

EUVDB-ID: #VU15903

Risk: Medium

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-19132

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform denial of service (DoS) attack.

The vulnerability exists due to memory leak when processing SNMP requests. A remote attacker can send a specially crafted SNMP request via the proxy server, trigger excessive consumption of memory resources on the system and denial of service conditions.

Mitigation

Update the affected packages.

i686:
    squid-3.5.20-12.38.amzn1.i686
    squid-migration-script-3.5.20-12.38.amzn1.i686
    squid-debuginfo-3.5.20-12.38.amzn1.i686

src:
    squid-3.5.20-12.38.amzn1.src

x86_64:
    squid-debuginfo-3.5.20-12.38.amzn1.x86_64
    squid-3.5.20-12.38.amzn1.x86_64
    squid-migration-script-3.5.20-12.38.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2019-1176.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.