Free of static data in accountsservice
CVE-2021-3939
7.8HIGH
What is CVE-2021-3939?
Ubuntu-specific modifications to accountsservice (in patch file debian/patches/0010-set-language.patch) caused the fallback_locale variable, pointing to static storage, to be freed, in the user_change_language_authorized_cb function. This is reachable via the SetLanguage dbus function. This is fixed in versions 0.6.55-0ubuntu12~20.04.5, 0.6.55-0ubuntu13.3, 0.6.55-0ubuntu14.1.
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Affected Version(s)
accountsservice 0.6.55-0ubuntu12~20.04 < 0.6.55-0ubuntu12~20.04.5
accountsservice 0.6.55-0ubuntu13 < 0.6.55-0ubuntu13.3
accountsservice 0.6.55-0ubuntu14 < 0.6.55-0ubuntu14.1
References
CVSS V3.1
Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged
Timeline
Vulnerability published
Vulnerability Reserved
Credit
Kevin Backhouse