Critical severity · published Nov 11, 2021
CVE-2021-3907
OctoRPKI does not escape a URI with a filename containing "..", this allows a repository to create a file, (ex
9.8
CVSS
4.2%
EPSS
No
On KEV
Description
OctoRPKI does not escape a URI with a filename containing "..", this allows a repository to create a file, (ex. rsync://example.org/repo/../../etc/cron.daily/evil.roa), which would then be written to disk outside the base cache folder. This could allow for remote code execution on the host machine OctoRPKI is running on.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.2% · higher than 91% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
10.0; 11.0 · source: NVD
OC
Octorpki · Cloudflare
before 1.3.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3907
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-3907
Third Party Advisory
https://github.com/cloudflare/cfrpki/security/advisories/GHSA-3jhm-87m6-x959
Third Party Advisory
https://github.com/cloudflare/cfrpki/security/advisories/GHSA-cqh2-vc2f-q4fh
Third Party Advisory
https://www.debian.org/security/2021/dsa-5033
Third Party Advisory
https://www.debian.org/security/2022/dsa-5041
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CVE-2021-3910
OctoRPKI crashes when encountering a repository that returns an invalid ROA (just an encoded NUL (\0) character)
7.5
CVE-2021-3909
OctoRPKI does not limit the length of a connection, allowing for a slowloris DOS attack to take place which makes OctoRPKI wait forever
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CVE-2021-3908
OctoRPKI does not limit the depth of a certificate chain, allowing for a CA to create children in an ad-hoc fashion, thereby making tree traversal never end
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CVE-2021-3761
Any CA issuer in the RPKI can trick OctoRPKI prior to 1.3.0 into emitting an invalid VRP "MaxLength" value, causing RTR sessions to terminate