CVE-2024-31080: Red Hat Xorg-x11-server: heap buffer overread/data leakage in procxigetselectedevents
This Red Hat advisory covers CVE-2024-31080 in Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION, Red Hat Enterprise Linux 7 and Red Hat Enterprise Linux 8.2 Advanced Update Support.
- CVE-2024-31080
Key facts
- Vendor rating
- High, CVSS 7.3
- CISA KEV
- Not listed (catalogue checked )
- Fixed in
- tigervnc-0:1.1.0-25.el6_10.13, xorg-x11-server-0:1.20.4-29.el7_9, tigervnc-0:1.8.0-33.el7_9 and 29 more below
- Source published
- Source revised
- Listed by VulniPulse
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Affected products & platforms
Description
A heap-based buffer over-read vulnerability was found in the X.org server's ProcXIGetSelectedEvents() function. This issue occurs when byte-swapped length values are used in replies, potentially leading to memory leakage and segmentation faults, particularly when triggered by a client with a different endianness.
This vulnerability could be exploited by an attacker to cause the X server to read heap memory values and then transmit them back to the client until encountering an unmapped page, resulting in a crash.
Despite the attacker's inability to control the specific memory copied into the replies, the small length values typically stored in a 32-bit integer can result in significant attempted out-of-bounds reads. The Xorg server is not configured to run with root privileges in Red Hat Enterprise Linux 8 and 9.
Consequently, these versions have been assigned a Moderate severity rating. Red Hat severity: Important — CVSS 7.3 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H).
Weakness: CWE-126.
Affected products named by the advisory: Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.2 Telecommunications Update Service; and 10 more.
Text from the source record.
How to fix CVE-2024-31080
Upgrade to a fixed release named by Red Hat:
- tigervnc-0:1.1.0-25.el6_10.13
- xorg-x11-server-0:1.20.4-29.el7_9
- tigervnc-0:1.8.0-33.el7_9
- tigervnc-0:1.13.1-2.el8_9.10
- xorg-x11-server-0:1.20.11-23.el8_10
- tigervnc-0:1.13.1-10.el8_10
- xorg-x11-server-Xwayland-0:21.1.3-16.el8_10
- tigervnc-0:1.9.0-15.el8_2.11
- tigervnc-0:1.11.0-8.el8_4.10
- tigervnc-0:1.12.0-6.el8_6.11
- tigervnc-0:1.12.0-15.el8_8.10
- tigervnc-0:1.13.1-8.el9_4.3
- xorg-x11-server-Xwayland-0:23.2.7-1.el9
- xorg-x11-server-0:1.20.11-26.el9
- tigervnc-0:1.11.0-22.el9_0.11
- tigervnc-0:1.12.0-14.el9_2.8
- RHSA-2025:12751
- RHSA-2024:1785
- RHSA-2024:2080
- RHSA-2024:2037
- RHSA-2024:3258
- RHSA-2024:3261
- RHSA-2024:3343
- RHSA-2024:2041
- RHSA-2024:2042
and 7 more in the Red Hat advisory.
Vendor guidance
- Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Support dates for the fixed release lines
- Red Hat Enterprise Linux 10: support ends
- Red Hat Enterprise Linux 9: support ends
- Red Hat Enterprise Linux 4: support ended
- Red Hat Enterprise Linux 6: support ended
- Red Hat Enterprise Linux 8: support ends
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