CVE-2019-18678 Other in n/a

What is CVE-2019-18678?

CVE-2019-18678 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 26 Nov 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in Squid 3.x and 4.x through 4.8. It allows attackers to smuggle HTTP requests through frontend software to a Squid instance that splits the HTTP Request pipeline differently. The resulting Response messages corrupt caches (between a client and Squid) with attacker-controlled content at arbitrary URLs. Effects are isolated to software between the attacker client and Squid. There are no effects on Squid itself, nor on any upstream servers. The issue is related to a request header containing whitespace between a header name and a colon.

Weakness: CWE-444

Which versions are affected by CVE-2019-18678?

It affects 4 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Squid-Cache Squid.

How do I fix CVE-2019-18678?

Upgrade to a fixed version.

Is CVE-2019-18678 being exploited?

There is no known exploitation of CVE-2019-18678 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-2019-18678, GHSA-jvgf-c7c2-w98p, UBUNTU-CVE-2019-18678.