What’s Vulnerable › Vulnerabilities

CVE-2016-9380

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-01-23 · updated 2026-06-17
• Weakness: CWE-20

Description

The pygrub boot loader emulator in Xen, when nul-delimited output format is requested, allows local pygrub-using guest OS administrators to read or delete arbitrary files on the host via NUL bytes in the bootloader configuration file.

Affected products

• Citrix XenServer: 6.0.2, 6.2.0, 6.5, 7.0
• xen: all versions

References

• http://www.securityfocus.com/bid/94473
• http://www.securitytracker.com/id/1037347
• http://xenbits.xen.org/xsa/advisory-198.html
• http://xenbits.xen.org/xsa/xsa198.patch
• https://security.gentoo.org/glsa/201612-56
• https://support.citrix.com/article/CTX218775
• http://www.securityfocus.com/bid/94473
• http://www.securitytracker.com/id/1037347
• http://xenbits.xen.org/xsa/advisory-198.html
• http://xenbits.xen.org/xsa/xsa198.patch
• https://security.gentoo.org/glsa/201612-56
• https://support.citrix.com/article/CTX218775

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