CVE-2015-8923 Denial of service in n/a

What is CVE-2015-8923?

CVE-2015-8923 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 20 Sep 2016. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

The process_extra function in libarchive before 3.2.0 uses the size field and a signed number in an offset, which allows remote attackers to cause a denial of service (crash) via a crafted zip file.

Weakness: CWE-20

Which versions are affected by CVE-2015-8923?

It affects 5 products.

Products include Canonical Ubuntu Linux, Libarchive Libarchive, Novell Suse Linux Enterprise Desktop, Novell Suse Linux Enterprise Server, Novell Suse Linux Enterprise Software Development Kit.

How do I fix CVE-2015-8923?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2015-8923 being exploited?

There is no known exploitation of CVE-2015-8923 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-2015-8923, GHSA-h5p5-pgmm-q97w, UBUNTU-CVE-2015-8923.