iTop: Improper Control of Generation of Code
CVE-2022-24780 is a high-severity improper control of generation of code vulnerability in iTop from Combodo, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. Affected iTop versions: < 2.7.6. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 5.7% chance of exploitation within 30 days, which is in the top 6.87% of all scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of iTop you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on github.com for workarounds and exact fixed builds.
Affected products and versions
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
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- 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:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 8.8 | High | CNA (github.com) |
| CVSS 3.1 | 8.8 | High | NVD |
| CVSS 2.0 | 6.5 | Medium | NVD |
Official description
Combodo iTop is a web based IT Service Management tool. In versions prior to 2.7.6 and 3.0.0, users of the iTop user portal can send TWIG code to the server by forging specific http queries, and execute arbitrary code on the server using http server user privileges. This issue is fixed in versions 2.7.6 and 3.0.0. There are currently no known workarounds.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Control of Generation of Code
The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
How developers prevent this class of flaw
- Refactor your program so that you do not have to dynamically generate code.
- Run your code in a jail or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict which code can be executed by your product. Examples include the Unix chroot jail and AppArmor. In general, managed code may provide some protection. This may not be a feasible solution, and it only limits the impact to the operating system; the rest of your application may still be subject to compromise. Be careful to avoid CWE-243 and other weaknesses related to jails.
- Use dynamic tools and techniques that interact with the product using large test suites with many diverse inputs, such as fuzz testing (fuzzing), robustness testing, and fault injection. The product's operation may slow down, but it should not become unstable, crash, or generate incorrect results.
More Improper Control of Generation of Code vulnerabilities (CWE-94)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Advisories
- github.com/Combodo/iTop/security/advisories/GHSA-v97m-wgxq-rh54Third Party Advisory
Patches and release notes
- github.com/Combodo/iTop/commit/93f273a28778e5da8e51096f021d2dc1adbf4ef3Third Party Advisory
- github.com/Combodo/iTop/commit/b6fac4b411b8d145fc30fa35c66b51243eafd06bThird Party Advisory
- github.com/Combodo/iTop/commit/eb2a615bd28100442c7f6171707bb40884af2305Third Party Advisory
Technical write-ups (may include proof of concept)
- packetstormsecurity.com/files/167236/iTop-Remote-Command-Execution.htmlExploit, Third Party Advisory, VDB Entry
- markus-krell.de/itop-template-injection-inside-customer-portal/Exploit, Third Party Advisory
Other vulnerabilities in iTop
- 8.7 High severity
- 9.4 Critical severity
- 8.9 High severity
- 7.7 High severity
- 8.6 High severity
- 8.8 High severity
Recent Improper Control of Generation of Code vulnerabilities
- 7.2 High severity
- 9.8 Critical severity
- 7.2 High severity
- 9.8 Critical severity
- 8.8 High severity
- 8.8 High severity
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