Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.4.24, 0.5.14, and 0.6.4, Net::IMAP::ResponseReader has quadratic time complexity when reading large responses containing many string literals. A hostile server can send responses which are crafted to exhaust the clients CPU for a denial of service attack. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.
Weakness
An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Net::imap | Ruby-lang | * | 0.4.24 (excluding) |
| Net::imap | Ruby-lang | 0.5.0 (including) | 0.5.14 (excluding) |
| Net::imap | Ruby-lang | 0.6.0 (including) | 0.6.4 (excluding) |
| Red Hat Enterprise Linux 10 | RedHat | ruby4.0-0:4.0.3-35.el10_2 | * |
| Red Hat Enterprise Linux 10 | RedHat | ruby-0:3.3.10-13.el10_2 | * |
| Red Hat Enterprise Linux 10.0 Extended Update Support | RedHat | ruby-0:3.3.10-11.el10_0.2 | * |
| Red Hat Enterprise Linux 8 | RedHat | ruby:3.3-8100020260615131010.489197e6 | * |
| Red Hat Enterprise Linux 9 | RedHat | ruby:3.3-9080020260615131001.9 | * |
| Red Hat Enterprise Linux 9 | RedHat | ruby:4.0-9080020260619130154.9 | * |
| Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | RedHat | ruby:3.3-9040020260630065449.9 | * |
| Red Hat Enterprise Linux 9.6 Extended Update Support | RedHat | ruby:3.3-9060020260630075016.9 | * |
| Red Hat Hardened Images | RedHat | ruby4-0-main-4.0.0-33.4.hum1 | * |
| Red Hat Hardened Images | RedHat | ruby3-4-main-3.4.8-31.2.hum1 | * |
| Red Hat Hardened Images | RedHat | ruby3-3-main-3.3.10-23.2.hum1 | * |
| Jruby | Ubuntu | esm-apps/xenial | * |
| Jruby | Ubuntu | questing | * |
| Ruby2.3 | Ubuntu | esm-infra/xenial | * |
| Ruby3.3 | Ubuntu | questing | * |
References
- https://github.com/ruby/net-imap/commit/6091f7d6b1f3514cafbfe39c76f2b5d73de3ca96
- https://github.com/ruby/net-imap/commit/88d95231fc8afef11c1f074453f7d75b68c9dfda
- https://github.com/ruby/net-imap/commit/de685f91a4a4cc75eb80da898c2bf8af08d34819
- https://github.com/ruby/net-imap/releases/tag/v0.4.24
- https://github.com/ruby/net-imap/releases/tag/v0.5.14
- https://github.com/ruby/net-imap/releases/tag/v0.6.4
- https://github.com/ruby/net-imap/security/advisories/GHSA-q2mw-fvj9-vvcw