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CVE-2020-16127

accountsservice .pam_environment infinite loop

Published: Nov 11, 2020Updated: Nov 21, 2024 Sources: CVE List NVDCWE-20
NVD MITRE
2.8CVSSLOW
EPSS Score
0.4%
Top 67.6%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
No Fix Available

Description

An Ubuntu-specific modification to AccountsService in versions before 0.6.55-0ubuntu13.2, among other earlier versions, would perform unbounded read operations on user-controlled ~/.pam_environment files, allowing an infinite loop if /dev/zero is symlinked to this location.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:RS:UC:NI:NA:L
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
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Weaknesses

CWE-20CWE-835

Affected Products

accountsserviceFreedesktopOSS Libraries
accountsservicefreedesktopOSS Libraries
freedesktoposs-projectOSS Librariesaka freedesktop.org

Attack Graph

Products CVE Techniques Tactics

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Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

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MITRE ATT&CK

2 techniques
Impact
Initial Access
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References

https://securitylab.github.com/advisories/GHSL-2020-187-accountsservice-drop-privs-DOS
securitylab.github.com

Timeline

Published
Nov 11, 2020
Last Updated
Nov 21, 2024

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