Buffer overflow in Nlnet Labs Routinator
CVE-2021-43174
NLnet Labs Routinator versions 0.9.0 up to and including 0.10.1, support the gzip transfer encoding when querying RRDP repositories. This encoding can be used by an RRDP repository to cause an out-of-memory crash in these versions of Routinator. RRDP uses XML which allows arbitrary amounts of white space in the encoded data. The gzip scheme compresses such white space extremely well, leading to very small compressed files that become huge when being decompressed for further processing, big enough that Routinator runs out of memory when parsing input data waiting for the next XML element.
EPSS: 0.012 (66.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Nlnet Labs Routinator — versions unspecified
- Nlnetlabs Routinator
- Debian Debian_linux — versions 11.0
Weakness classification (CWE)
References
- sep@nlnetlabs.nl (x_refsource_MISC, Vendor Advisory)
- sep@nlnetlabs.nl (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
Frequently asked questions
- What is CVE-2021-43174?
- CVE-2021-43174 is a high-severity vulnerability in Nlnet Labs Routinator, classified under CWE-1325. CVSS score: 7.5/10. Published 2021-11-09.
- How severe is CVE-2021-43174?
- High severity. CVSS v3 base score is 7.5 out of 10.