gzip transfer encoding caused out-of-memory crash
CVE-2021-43174

7.5HIGH

Key Information:

Vendor

Nlnet Labs

Status
Routinator
Vendor
CVE Published:
9 November 2021

What is 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.

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Affected Version(s)

Routinator <= 0.10.1

References

https://www.nlnetlabs.nl/downloads/routinator/CVE-2021-43...
x_refsource_MISC
https://www.debian.org/security/2022/dsa-5041
vendor-advisoryx_refsource_DEBIAN

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

We would like to thank Koen van Hove for the discovery.
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