A vulnerability was found in Ruby. The Ruby interpreter is vulnerable to the Marvin Attack. This attack allows the attacker to decrypt previously encrypted messages or forge signatures by exchanging a large number of messages with the vulnerable service.
Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.5.10, 4.4.17, and 4.3.23, when using Ruby versions older than 3.4, PrivateAddressCheck.privateaddress? returns false for IPv4-mapped IPv6 addresses (::ffff:a.b.c.d) corresponding to some private IPv4 addresses, depending on Ruby version, this can include loopback, RFC1918 private networks, and link-local space. An attacker who controls DNS for any domain can publish an AAAA record with such a mapped address; any outbound HTTP fetch Mastodon performs against that hostname then opens a real TCP connection to the underlying IPv4 address, including 127.0.0.1 and cloud-metadata endpoints such as 169.254.169.254. This vulnerability is fixed in 4.5.10, 4.4.17, and 4.3.23.
End of life: 3/31/2029, Latest version: 4.0.6
End of life: 3/31/2028, Latest version: 3.4.10
End of life: 3/31/2028, Latest version: 3.4.10
End of life: 3/31/2027, Latest version: 3.3.12
End of life: 3/31/2027, Latest version: 3.3.12
End of life: 3/31/2026, Latest version: 3.2.11
End of life: 3/31/2026, Latest version: 3.2.11
Originally, Common Vulnerabilities and Exposures assigned an identifier of CVE-2011-1005 to the following vulnerability:
The safe-level feature in Ruby 1.8.6 through 1.8.6-420, 1.8.7 through 1.8.7-330, and 1.8.8dev allows context-dependent attackers to modify strings via the Exception#tos method, as demonstrated by changing an intended pathname.
with the following upstream patch: [1] http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?revision=30903&view=revision
Based on later upstream patch for different (CVE-2012-4464 and CVE-2012-4466) issues: [2] http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=37068
it was found that original upstream 1.8.x ruby patch for CVE-2011-1005 issue was not complete, when the NameError#tos() method was used on / with Ruby objects (the test logic in 'testtostaintnesspropagation' test from [1] was actually reversed, so the test returned success also on still vulnerable instances).
Acknowledgements:
This issue was discovered by Vit Ondruch of Red Hat.
End of life: 3/26/2025, Latest version: 3.1.7
End of life: 3/26/2025, Latest version: 3.1.7