CVE-2016-9379

The pygrub boot loader emulator in Xen, when S-expression output format is requested, allows local pygrub-using guest OS administrators to read or delete arbitrary files on the host via string quotes and S-expressions in the bootloader configuration file.

• CWE-20

• http://www.securityfocus.com/bid/94473Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1037347Third Party Advisory, VDB Entry
• http://xenbits.xen.org/xsa/advisory-198.htmlPatch, Vendor Advisory
• http://xenbits.xen.org/xsa/xsa198.patchPatch, Vendor Advisory
• https://security.gentoo.org/glsa/201612-56
• https://support.citrix.com/article/CTX218775Patch, Third Party Advisory
• http://www.securityfocus.com/bid/94473Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1037347Third Party Advisory, VDB Entry
• http://xenbits.xen.org/xsa/advisory-198.htmlPatch, Vendor Advisory
• http://xenbits.xen.org/xsa/xsa198.patchPatch, Vendor Advisory
• https://security.gentoo.org/glsa/201612-56
• https://support.citrix.com/article/CTX218775Patch, Third Party Advisory

Published

Jan 23, 2017

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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