CVE-2020-27197 libtaxii Server-Side Request Forgery vulnerability
An attacker can trigger Server-Side Request Forgery in the libtaxii library by manipulating URL parsing, bypassing network restrictions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-27197?
CVE-2020-27197 is a critical server-side request forgery vulnerability in n/a, published on 17 Oct 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
TAXII libtaxii through 1.1.117, as used in EclecticIQ OpenTAXII through 0.2.0 and other products, allows SSRF via an initial http:// substring to the parse method, even when the no_network setting is used for the XML parser. NOTE: the vendor points out that the parse method "wraps the lxml library" and that this may be an issue to "raise ... to the lxml group.
Weakness: CWE-918
Which versions are affected by CVE-2020-27197?
3 open source packages ship an affected version, including libtaxii. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
libtaxii PyPI | All versions | 1.1.118 |
libtaxii PyPI | All versions | 1.1.118 |
libtaxii PyPI | All versions | 1.1.118 |
Products include Eclecticiq Opentaxii, Libtaxii Project Libtaxii.
How do I fix CVE-2020-27197?
Upgrade libtaxii to 1.1.118 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2020-27197 being exploited?
There is no known exploitation of CVE-2020-27197 in the wild and no public exploit code.
Sources
Also known as GHSA-836c-xg97-8p4h, PYSEC-2020-59.