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CVE-2020-6096

Publication date 1 April 2020

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

8.1 · High

Score breakdown

An exploitable signed comparison vulnerability exists in the ARMv7 memcpy() implementation of GNU glibc 2.30.9000. Calling memcpy() (on ARMv7 targets that utilize the GNU glibc implementation) with a negative value for the 'num' parameter results in a signed comparison vulnerability. If an attacker underflows the 'num' parameter to memcpy(), this vulnerability could lead to undefined behavior such as writing to out-of-bounds memory and potentially remote code execution. Furthermore, this memcpy() implementation allows for program execution to continue in scenarios where a segmentation fault or crash should have occurred. The dangers occur in that subsequent execution and iterations of this code will be executed with this corrupted data.

Status

Package Ubuntu Release Status
eglibc 24.10 oracular Not in release
24.04 LTS noble Not in release
23.10 mantic Not in release
23.04 lunar Not in release
22.10 kinetic Not in release
22.04 LTS jammy Not in release
21.10 impish Not in release
21.04 hirsute Not in release
20.10 groovy Not in release
20.04 LTS focal Not in release
19.10 eoan Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty
Vulnerable
glibc 24.10 oracular
Fixed 2.32-0ubuntu3
24.04 LTS noble
Fixed 2.32-0ubuntu3
23.10 mantic
Fixed 2.32-0ubuntu3
23.04 lunar
Fixed 2.32-0ubuntu3
22.10 kinetic
Fixed 2.32-0ubuntu3
22.04 LTS jammy
Fixed 2.32-0ubuntu3
21.10 impish
Fixed 2.32-0ubuntu3
21.04 hirsute
Fixed 2.32-0ubuntu3
20.10 groovy
Fixed 2.32-0ubuntu3
20.04 LTS focal
Fixed 2.31-0ubuntu9.7
19.10 eoan Ignored end of life
18.04 LTS bionic
Fixed 2.27-3ubuntu1.5
16.04 LTS xenial
Fixed 2.23-0ubuntu11.3
14.04 LTS trusty Not in release

Severity score breakdown

Parameter Value
Base score 8.1 · High
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-4954-1
    • GNU C Library vulnerabilities
    • 14 May 2021
    • USN-5310-1
    • GNU C Library vulnerabilities
    • 1 March 2022

Other references