CVE-2017-5566 — Code injection vulnerability in AVG Ultimate 17
Code injection vulnerability in AVG Ultimate 17.1 (and earlier), AVG Internet Security 17.1 (and earlier), and AVG AntiVirus FREE 17.1 (and earlier) allows a local attacker to bypass a self-protection mechanism, inject arbitrary code, and take full control of any AVG process via
Published
2017-03-21T16:59:00.333
Last modified
2026-05-13T00:24:29.033
CVSS vector
AV:L/AC:L/Au:N/C:C/I:C/A:C
01What is this vulnerability?
Code injection vulnerability in AVG Ultimate 17.1 (and earlier), AVG Internet Security 17.1 (and earlier), and AVG AntiVirus FREE 17.1 (and earlier) allows a local attacker to bypass a self-protection mechanism, inject arbitrary code, and take full control of any AVG process via a "DoubleAgent" attack. One perspective on this issue is that (1) these products do not use the Protected Processes…
02Affected products
No structured affected-product list available — see references below for vendor advisories.
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2017-03-21T16:59:00.333
- Last modified: 2026-05-13T00:24:29.033
09References
- cybellum.com — http://cybellum.com/doubleagent-taking-full-control-antivirus/
- cybellum.com — http://cybellum.com/doubleagentzero-day-code-injection-and-persistence-technique…
- www.securityfocus.com — http://www.securityfocus.com/bid/97022
- cybellum.com — http://cybellum.com/doubleagent-taking-full-control-antivirus/
- cybellum.com — http://cybellum.com/doubleagentzero-day-code-injection-and-persistence-technique…
- www.securityfocus.com — http://www.securityfocus.com/bid/97022
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