Home/CVE/Ubuntu-specific modifications to accountsservice (in patch file debian/patches/0010-set-language.patch) caused the fallb
CVE

CVE-2021-3939

Ubuntu-specific modifications to accountsservice (in patch file debian/patches/0010-set-language.patch) caused the fallb

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.

HIGH · CVSS 7.8 EPSS 0.00124
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  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-590Free of Memory not on the Heap
CWE-763Release of Invalid Pointer or Reference
▤

Affected Products & Versions

4
canonical accountsservice>= 0.6.55-0ubuntu12\~20.04 and < 0.6.55-0ubuntu12\~20.05
canonical accountsservice>= 0.6.55-0ubuntu13 and < 0.6.55-0ubuntu13.3
canonical accountsservice>= 0.6.55-0ubuntu14 and < 0.6.55-0ubuntu14.1
canonical ubuntu linuxall versions
⚠

Public Exploits & PoCs

1
pocpacketstormsecurity.com · Ubuntu-accountsservice-Double-Free-Memory-Corruption.htmlpacketstormsecurity.com
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Scoring & Timeline

7.8
HIGH · CVSS v3.1 · security@ubuntu.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD17 Nov 2021 · 04:15 AM
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
⚑

Vendor Advisories

1
usnUSN-5149-1
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/1950149Broken Link
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