7.8
CWE
476
Advisory Published
CVE Published
Updated

CVE-2021-30500: Null Pointer Dereference

First published: Mon Apr 12 2021(Updated: )

Null pointer dereference was found in upx PackLinuxElf::canUnpack() in p_lx_elf.cpp,in version UPX 4.0.0. That allow attackers to execute arbitrary code and cause a denial of service via a crafted file. Upstream issue: <a href="https://github.com/upx/upx/issues/48">https://github.com/upx/upx/issues/48</a> Upstream patch: <a href="https://github.com/upx/upx/commit/90279abdfcd235172eab99651043051188938dcc">https://github.com/upx/upx/commit/90279abdfcd235172eab99651043051188938dcc</a>

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
UPX=4.0.0
Red Hat Enterprise Linux=7.0
Fedoraproject Fedora=33

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Frequently Asked Questions

  • What is the vulnerability ID for this issue?

    The vulnerability ID for this issue is CVE-2021-30500.

  • What is the severity of CVE-2021-30500?

    The severity of CVE-2021-30500 is high.

  • What is the affected software of CVE-2021-30500?

    The affected software of CVE-2021-30500 includes UPX 4.0.0, Redhat Enterprise Linux 7.0, and Fedoraproject Fedora 33.

  • How can attackers exploit CVE-2021-30500?

    Attackers can exploit CVE-2021-30500 by executing arbitrary code and causing a denial of service via a crafted file.

  • Are there any references available for CVE-2021-30500?

    Yes, you can refer to the following links for more information: [Link 1](https://bugzilla.redhat.com/show_bug.cgi?id=1948692), [Link 2](https://github.com/upx/upx/commit/90279abdfcd235172eab99651043051188938dcc), [Link 3](https://github.com/upx/upx/issues/485).

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203