Information disclosure in Arm Cortex-A
CVE-2018-9056
Systems with microprocessors utilizing speculative execution may allow unauthorized disclosure of information to an attacker with local user access via a side-channel attack on the directional branch predictor, as demonstrated by a pattern history table (PHT), aka BranchScope.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.007 (52.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Arm Cortex-A — versions 9, 15, 17
- Intel Atom C — versions c2308, c2316, c2338
- Intel Atom E — versions e3805, e3815, e3825
- Intel Atom X3 — versions c3130, c3200rk, c3205rk
- Intel Atom Z — versions z2420, z2460, z2480
- Intel Celeron J — versions j1750, j1800, j1850
- Intel Celeron N — versions n2805, n2806, n2807
- Intel Core I3 — versions 330e, 330m, 330um
- Intel Core I5 — versions 430m, 430um, 450m
- Intel Core I7 — versions 7y75, 610e, 620le
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.cs.ucr.edu/~nael/pubs/asplos18.pdf (Exploit, Third Party Advisory)
- arstechnica.com/gadgets/2018/03/its-not-just-spectre-researchers-reveal-more-br… (Third Party Advisory)
Frequently asked questions
- What is CVE-2018-9056?
- CVE-2018-9056 is a medium-severity vulnerability in Arm Cortex-A, classified under Information Disclosure. CVSS score: 5.6/10. Published 2018-03-27.
- How severe is CVE-2018-9056?
- Medium severity. CVSS v3 base score is 5.6 out of 10.
- Is CVE-2018-9056 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.