V-Server and V-Server Lite: Out-of-bounds Read
CVE-2022-30549 is a high-severity out-of-bounds read vulnerability in V-Server and V-Server Lite from FUJI ELECTRIC CO., LTD. / Hakko Electronics, with a CVSS 3.1 base score of 7.8 out of 10. It can be exploited with local access to the system by an unauthenticated attacker, but only if a user takes part, for example by opening a link or file. There is no confirmed exploitation so far. EPSS estimates a 0.98% chance of exploitation within 30 days, higher than 63% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of V-Server and V-Server Lite you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on monitouch.fujielectric.com for workarounds and exact fixed builds.
- Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| FUJI ELECTRIC CO., LTD. / Hakko Electronics | V-Server and V-Server Lite | Not specified in the record | Not stated |
| Fujielectric | V-server | 4.0.11.0 and earlier; 4.0.13.0 and earlier | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- RequiredA user must take an action such as opening a file or link.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.8 | High | NVD |
| CVSS 2.0 | 6.8 | Medium | NVD |
Official description
Out-of-bounds read vulnerability exists in V-Server v4.0.11.0 and earlier and V-Server Lite v4.0.13.0 and earlier, which may allow an attacker to obtain information and/or execute arbitrary code by having a user to open a specially crafted image file.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.
How developers prevent this class of flaw
- Use a language that provides appropriate memory abstractions.
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Advisories
Third-party and government advisories
- jvn.jp/en/vu/JVNVU93134398/index.htmlThird Party Advisory
Other vulnerabilities in V-Server and V-Server Lite
- 7.8 High severity
Recent Out-of-bounds Read vulnerabilities
- 9.3 High severity
- 7.8 High severity
- 7.8 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
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