CVE-2019-17455 Memory corruption in n/a

What is CVE-2019-17455?

CVE-2019-17455 is a critical memory corruption vulnerability in Canonical Ubuntu Linux, published on 10 Oct 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest, tSmbNtlmAuthChallenge, and tSmbNtlmAuthResponse read and write operations, as demonstrated by a stack-based buffer over-read in buildSmbNtlmAuthRequest in smbutil.c for a crafted NTLM request.

Weakness: CWE-125

Which versions are affected by CVE-2019-17455?

It affects 6 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Nongnu Libntlm, Opensuse Backports Sle, Opensuse Leap.

How do I fix CVE-2019-17455?

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-2019-17455 being exploited?

There is no known exploitation of CVE-2019-17455 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 AZL-7266, DEBIAN-CVE-2019-17455, DLA-2207-1, DLA-2831-1, GHSA-m8c7-4hj3-f3m6, MGASA-2020-0219 and 6 more.