Red Hat Enterprise Linux 6 Extended Lifecycle…: Buffer Over-read
CVE-2024-31080 is a high-severity buffer over-read vulnerability in Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION from Red Hat, with a CVSS 3.1 base score of 7.3 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. There is no confirmed exploitation so far. EPSS estimates a 0.52% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- LowLimited modification of data is possible.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H. Scored by CNA (redhat.com).
Official 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.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Buffer Over-read
The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other references
- access.redhat.com/errata/RHSA-2024:1785
- access.redhat.com/errata/RHSA-2024:2036
- access.redhat.com/errata/RHSA-2024:2037
- access.redhat.com/errata/RHSA-2024:2038
- access.redhat.com/errata/RHSA-2024:2039
- access.redhat.com/errata/RHSA-2024:2040
- access.redhat.com/errata/RHSA-2024:2041
- access.redhat.com/errata/RHSA-2024:2042
- access.redhat.com/errata/RHSA-2024:2080
- access.redhat.com/errata/RHSA-2024:2616
- access.redhat.com/errata/RHSA-2024:3258
- access.redhat.com/errata/RHSA-2024:3261
- access.redhat.com/errata/RHSA-2024:3343
- access.redhat.com/errata/RHSA-2024:9093
- access.redhat.com/errata/RHSA-2024:9122
Other vulnerabilities in Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION
- 9.8 Critical severity
- 7.5 High severity
- 7.5 High severity
- 8.1 High severity
- 7.8 High severity
- 7.8 High severity
Recent Buffer Over-read vulnerabilities
- 7.3 High severity
- 7.3 High severity
- 7.5 High severity
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