Vulnerabilities
Misconfiguration
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CVE Vulnerabilities

CVE-2024-9632

Heap-based Buffer Overflow

Published: Oct 30, 2024 | Modified: Aug 04, 2025
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
RedHat/V2
RedHat/V3
7.8 IMPORTANT
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2024-9632
CWEhttps://cwe.mitre.org/data/definitions/122.html

A flaw was found in the X.org server. Due to improperly tracked allocation size in _XkbSetCompatMap, a local attacker may be able to trigger a buffer overflow condition via a specially crafted payload, leading to denial of service or local privilege escalation in distributions where the X.org server is run with root privileges.

Weakness

A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Affected Software

NameVendorStart VersionEnd Version
Red Hat Enterprise Linux 10RedHatxorg-x11-server-Xwayland-0:24.1.5-3.el10_0*
Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSIONRedHattigervnc-0:1.1.0-25.el6_10.13*
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRedHattigervnc-0:1.8.0-34.el7_9*
Red Hat Enterprise Linux 8RedHatxorg-x11-server-0:1.20.11-25.el8_10*
Red Hat Enterprise Linux 8RedHatxorg-x11-server-Xwayland-0:21.1.3-17.el8_10*
Red Hat Enterprise Linux 8RedHattigervnc-0:1.13.1-14.el8_10*
Red Hat Enterprise Linux 8.2 Advanced Update SupportRedHattigervnc-0:1.9.0-15.el8_2.12*
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRedHattigervnc-0:1.11.0-8.el8_4.11*
Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceRedHattigervnc-0:1.11.0-8.el8_4.11*
Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsRedHattigervnc-0:1.11.0-8.el8_4.11*
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRedHattigervnc-0:1.12.0-6.el8_6.12*
Red Hat Enterprise Linux 8.6 Telecommunications Update ServiceRedHattigervnc-0:1.12.0-6.el8_6.12*
Red Hat Enterprise Linux 8.6 Update Services for SAP SolutionsRedHattigervnc-0:1.12.0-6.el8_6.12*
Red Hat Enterprise Linux 8.8 Extended Update SupportRedHattigervnc-0:1.12.0-15.el8_8.11*
Red Hat Enterprise Linux 9RedHattigervnc-0:1.14.1-1.el9_5*
Red Hat Enterprise Linux 9RedHatxorg-x11-server-0:1.20.11-28.el9_6*
Red Hat Enterprise Linux 9RedHatxorg-x11-server-Xwayland-0:23.2.7-3.el9_6*
Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsRedHattigervnc-0:1.11.0-22.el9_0.12*
Red Hat Enterprise Linux 9.2 Extended Update SupportRedHattigervnc-0:1.12.0-14.el9_2.9*
Red Hat Enterprise Linux 9.4 Extended Update SupportRedHattigervnc-0:1.13.1-8.el9_4.4*
Xorg-serverUbuntudevel*
Xorg-serverUbuntuesm-infra/bionic*
Xorg-serverUbuntuesm-infra/focal*
Xorg-serverUbuntuesm-infra/xenial*
Xorg-serverUbuntufocal*
Xorg-serverUbuntujammy*
Xorg-serverUbuntunoble*
Xorg-serverUbuntuoracular*
Xorg-serverUbuntuplucky*
Xorg-serverUbuntuquesting*
Xorg-serverUbuntutrusty/esm*
Xorg-serverUbuntuupstream*
Xorg-server-hwe-16.04Ubuntuesm-infra/xenial*
Xorg-server-hwe-18.04Ubuntuesm-infra/bionic*
XwaylandUbuntudevel*
XwaylandUbuntujammy*
XwaylandUbuntunoble*
XwaylandUbuntuoracular*
XwaylandUbuntuplucky*
XwaylandUbuntuquesting*
XwaylandUbuntuupstream*

Potential Mitigations

  • Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking.
  • D3-SFCV (Stack Frame Canary Validation) from D3FEND [REF-1334] discusses canary-based detection in detail.
  • Run or compile the software using features or extensions that randomly arrange the positions of a program’s executable and libraries in memory. Because this makes the addresses unpredictable, it can prevent an attacker from reliably jumping to exploitable code.
  • Examples include Address Space Layout Randomization (ASLR) [REF-58] [REF-60] and Position-Independent Executables (PIE) [REF-64]. Imported modules may be similarly realigned if their default memory addresses conflict with other modules, in a process known as “rebasing” (for Windows) and “prelinking” (for Linux) [REF-1332] using randomly generated addresses. ASLR for libraries cannot be used in conjunction with prelink since it would require relocating the libraries at run-time, defeating the whole purpose of prelinking.
  • For more information on these techniques see D3-SAOR (Segment Address Offset Randomization) from D3FEND [REF-1335].

References

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