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CVE-2019-19126

Publication date 19 November 2019

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

3.3 · Low

Score breakdown

On the x86-64 architecture, the GNU C Library (aka glibc) before 2.31 fails to ignore the LD_PREFER_MAP_32BIT_EXEC environment variable during program execution after a security transition, allowing local attackers to restrict the possible mapping addresses for loaded libraries and thus bypass ASLR for a setuid program.

Read the notes from the security team

Status

Package Ubuntu Release Status
eglibc 20.04 LTS focal Not in release
19.10 eoan Not in release
19.04 disco Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty
Not affected
glibc 20.04 LTS focal
Not affected
19.10 eoan
Fixed 2.30-0ubuntu2.2
19.04 disco Ignored
18.04 LTS bionic
Fixed 2.27-3ubuntu1.2
16.04 LTS xenial
Fixed 2.23-0ubuntu11.2
14.04 LTS trusty Not in release

Notes

sbeattie

introduced in b9eb92ab05204df772eb4929eccd018637c9f3e9, so glibc 2.23

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
glibc

Severity score breakdown

Parameter Value
Base score 3.3 · Low
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality Low
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

Related Ubuntu Security Notices (USN)

    • USN-4416-1
    • GNU C Library vulnerabilities
    • 6 July 2020

Other references