CVE-2020-8517 Memory corruption in n/a

What is CVE-2020-8517?

CVE-2020-8517 is a high-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 4 Feb 2020. 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 before 4.10. Due to incorrect input validation, the NTLM authentication credentials parser in ext_lm_group_acl may write to memory outside the credentials buffer. On systems with memory access protections, this can result in the helper process being terminated unexpectedly. This leads to the Squid process also terminating and a denial of service for all clients using the proxy.

Weakness: CWE-787, CWE-20

Which versions are affected by CVE-2020-8517?

It affects 3 products.

Products include Canonical Ubuntu Linux, Opensuse Leap, Squid-Cache Squid.

How do I fix CVE-2020-8517?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2020-8517 being exploited?

There is no known exploitation of CVE-2020-8517 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 ALPINE-CVE-2020-8517, DEBIAN-CVE-2020-8517, GHSA-8hwj-cjrf-5wh2, UBUNTU-CVE-2020-8517.