high
8.8
CWE
909
Advisory Published
Updated

CVE-2020-11741

First published: Tue Apr 14 2020(Updated: )

An issue was discovered in xenoprof in Xen through 4.13.x, allowing guest OS users (with active profiling) to obtain sensitive information about other guests, cause a denial of service, or possibly gain privileges. For guests for which "active" profiling was enabled by the administrator, the xenoprof code uses the standard Xen shared ring structure. Unfortunately, this code did not treat the guest as a potential adversary: it trusts the guest not to modify buffer size information or modify head / tail pointers in unexpected ways. This can crash the host (DoS). Privilege escalation cannot be ruled out.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Xen Xen<=4.13.0
Xen Xen=4.13.0-rc1
Xen Xen=4.13.0-rc2
Fedoraproject Fedora=30
Fedoraproject Fedora=31
Fedoraproject Fedora=32
Debian Debian Linux=10.0
openSUSE Leap=15.1
debian/xen
4.14.6-1
4.14.5+94-ge49571868d-1
4.17.3+10-g091466ba55-1~deb12u1
4.17.3+36-g54dacb5c02-1

Remedy

http://www.openwall.com/lists/oss-security/2020/04/14/1

Remedy

http://xenbits.xen.org/xsa/advisory-313.html

Remedy

https://xenbits.xen.org/xsa/advisory-313.html

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.

Read MoreStart Free Trial

Reference Links

Frequently Asked Questions

  • What is the vulnerability ID?

    The vulnerability ID is CVE-2020-11741.

  • What is the title of the vulnerability?

    The title of the vulnerability is 'An issue was discovered in xenoprof in Xen through 4.13.x allowing guest OS users (with active profiling) to obtain sensitive information about other guests, cause a denial of service, or possibly gain privileges.'

  • What is the affected software?

    The affected software is Xen through version 4.13.x.

  • How can a guest OS user exploit this vulnerability?

    A guest OS user can exploit this vulnerability if they have active profiling enabled, which allows them to obtain sensitive information about other guests, cause a denial of service, or possibly gain privileges.

  • Is there a remediation available for this vulnerability?

    Yes, there are remediation options available. For Ubuntu, the version 4.11.3+24- (up to, but excluding 4.11.3+24-) provides a fix. For Debian, the versions 4.11.4+107-gef32c7afa2-1, 4.14.5+94-ge49571868d-1, 4.17.1+2-gb773c48e36-1, and 4.17.2-1 have a fix.

Company

Resources

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.
© 2024 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203