CVE-2018-20102 Information disclosure in n/a

What is CVE-2018-20102?

CVE-2018-20102 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 12 Dec 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An out-of-bounds read in dns_validate_dns_response in dns.c was discovered in HAProxy through 1.8.14. Due to a missing check when validating DNS responses, remote attackers might be able read the 16 bytes corresponding to an AAAA record from the non-initialized part of the buffer, possibly accessing anything that was left on the stack, or even past the end of the 8193-byte buffer, depending on the value of accepted_payload_size.

Weakness: CWE-125

Which versions are affected by CVE-2018-20102?

It affects 3 products.

Products include Canonical Ubuntu Linux, Haproxy Haproxy, Redhat Openshift Container Platform.

How do I fix CVE-2018-20102?

Upgrade to a fixed version.

Is CVE-2018-20102 being exploited?

There is no known exploitation of CVE-2018-20102 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2018-20102, GHSA-5m22-hqfx-435p, UBUNTU-CVE-2018-20102.