Nicolas Krassas@Dinosn
Getting root on Ubuntu through wishful thinking https://securitylab.github.com/research//ubuntu-accountsservice-CVE-2021-3939/
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CVE-2021-3939(canonical / accountsservice)
LOWCVSS 7.8 · HIGHSignal is active with 2 mentions in latest observed window
Immediate actions
- Track advisory updates for patch or workaround availability
Recommended action window: Monitor and triage in normal cycle
NVD description
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.
0.0/ 10 priority
Sources & remediation
Vendor / third-party advisories
Other references
- http://packetstormsecurity.com/files/172848/Ubuntu-accountsservice-Double-Free-Memory-Corruption.html
- https://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/1950149
- http://packetstormsecurity.com/files/172848/Ubuntu-accountsservice-Double-Free-Memory-Corruption.html
- https://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/1950149
Weakness type (CWE)
CWE-590CWE-763
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
Are you affected?
If you run products in this scope, you should treat this CVE as relevant to your environment.
- accountsservice
- ubuntu_linux
Threat summary
- 2 mentions across 1 observed day
What's happening
- 2 total mentions across 1 day
Affected systems
Vendors
Products
accountsserviceubuntu_linux
3 versions affected across 2 products
Deep dive
Activity timeline2 mentions / 1d
Referenced assets2 URLs
Full discourse2 posts
- Nicolas Krassas@Dinosn
Getting root on Ubuntu through wishful thinking https://securitylab.github.com/research/ubuntu-accountsservice-CVE-2021-3939/
120311.8K158.6K followersView on X
CPE platform detail4 entries
4 of 4 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | canonical | accountsservice | - | - | - |
| OS | canonical | ubuntu_linux | 20.04 | - | - |
| OS | canonical | ubuntu_linux | 21.04 | - | - |
| OS | canonical | ubuntu_linux | 21.10 | - | - |