What’s Vulnerable › Vulnerabilities

CVE-2017-13723

• Severity: high (CVSS 7.8 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: 2017-10-10 · updated 2026-06-17
• Weakness: CWE-119

Description

In X.Org Server (aka xserver and xorg-server) before 1.19.4, a local attacker authenticated to the X server could overflow a global buffer, causing crashes of the X server or potentially other problems by injecting large or malformed XKB related atoms and accessing them via xkbcomp.

Affected products

• Debian Linux: 8.0, 9.0
• xorg-x11-server: through 1.19.3

References

• http://www.debian.org/security/2017/dsa-4000
• http://www.openwall.com/lists/oss-security/2017/10/04/10
• http://www.securityfocus.com/bid/101253
• https://cgit.freedesktop.org/xorg/xserver/commit/?id=94f11ca5cf011ef123bd222cabeaef6f424d76ac
• https://lists.debian.org/debian-lts-announce/2017/11/msg00032.html
• https://lists.x.org/archives/xorg-announce/2017-October/002808.html
• https://security.gentoo.org/glsa/201710-30
• http://www.debian.org/security/2017/dsa-4000
• http://www.openwall.com/lists/oss-security/2017/10/04/10
• http://www.securityfocus.com/bid/101253
• https://cgit.freedesktop.org/xorg/xserver/commit/?id=94f11ca5cf011ef123bd222cabeaef6f424d76ac
• https://lists.debian.org/debian-lts-announce/2017/11/msg00032.html

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