Vulnerability in Ikarussecurity Ikarus Antivirus
CVE-2017-15643
An active network attacker (MiTM) can achieve remote code execution on a machine that runs IKARUS Anti Virus 2.16.7. IKARUS AV for Windows uses cleartext HTTP for updates along with a CRC32 checksum and an update value for verification of the downloaded files. The attacker first forces the client to initiate an update transaction by modifying an update field within an HTTP 200 response, so that it refers to a nonexistent update. The attacker then modifies the HTTP 404 response so that it specifies a successfully found update, with a Trojan horse executable file (e.g., guardxup.exe) and the correct CRC32 checksum for that file.
Vulnerability class: HTTP Request Smuggling
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.064 (93.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 93.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.061 · newest: 0.064 · change: +0.002
Affected products
- Ikarussecurity Ikarus Antivirus — versions 2.16.7
Weakness classification (CWE)
Public proof-of-concept exploits
References
- blogs.securiteam.com/index.php/archives/3485 (Technical Description, Exploit, Third Party Advisory)
- www.ikarussecurity.com/about-ikarus/security-blog/vulnerability-in-windows-anti… (Vendor Advisory)
Frequently asked questions
- What is CVE-2017-15643?
- CVE-2017-15643 is a high-severity vulnerability in Ikarussecurity Ikarus Antivirus, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 7.4/10. Published 2017-10-19.
- How severe is CVE-2017-15643?
- High severity. CVSS v3 base score is 7.4 out of 10.
- Is CVE-2017-15643 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.