RCE in Sophos Web Appliance
CVE-2016-9553
The Sophos Web Appliance (version 4.2.1.3) is vulnerable to two Remote Command Injection vulnerabilities affecting its web administrative interface. These vulnerabilities occur in the MgrReport.php (/controllers/MgrReport.php) component responsible for blocking and unblocking IP addresses from accessing the device. The device doesn't properly escape the information passed in the variables 'unblockip' and 'blockip' before calling the shell_exec() function which allows for system commands to be injected into the device. The code erroneously suggests that the information handled is protected by utilizing the variable name 'escapedips' - however this was not the case. The Sophos ID is NSWA-1258.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.195 (97.3th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.195 · newest: 0.195 · change: 0.000
Affected products
- Sophos Web Appliance — versions 4.2.1.3
Weakness classification (CWE)
References
- swa.sophos.com/rn/swa/concepts/ReleaseNotes_4.3.1.html (Release Notes)
- www.securityfocus.com/bid/95853 (VDB Entry, Third Party Advisory, vdb-entry)
- community.sophos.com/products/web-appliance/b/blog/posts/release-of-swa-version… (Release Notes)
- pastebin.com/DUYuN0U5 (Exploit)
Frequently asked questions
- What is CVE-2016-9553?
- CVE-2016-9553 is a high-severity vulnerability in Sophos Web Appliance, classified under Command Injection. CVSS score: 7.2/10. Published 2017-01-28.
- How severe is CVE-2016-9553?
- High severity. CVSS v3 base score is 7.2 out of 10.