Description
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 client's CPU for a denial of service attack. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.
CVSS breakdown
CVSS 4.0
Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
None
User Interaction
Passive
Confidentiality (Vulnerable System)
None
Integrity (Vulnerable System)
None
Availability (Vulnerable System)
Low
Confidentiality (Subsequent System)
None
Integrity (Subsequent System)
None
Availability (Subsequent System)
None
Affected products
- ruby / net-imap< 0.4.24 – < 0.4.24
- ruby / net-imap>= 0.5.0, < 0.5.14 – >= 0.5.0, < 0.5.14
- ruby / net-imap>= 0.6.0, < 0.6.4 – >= 0.6.0, < 0.6.4
References
- VENDOR_ADVISORYhttps://github.com/ruby/net-imap/security/advisories/GHSA-q2mw-fvj9-vvcw
- PATCHhttps://github.com/ruby/net-imap/commit/6091f7d6b1f3514cafbfe39c76f2b5d73de3ca96
- PATCHhttps://github.com/ruby/net-imap/commit/88d95231fc8afef11c1f074453f7d75b68c9dfda
- PATCHhttps://github.com/ruby/net-imap/commit/de685f91a4a4cc75eb80da898c2bf8af08d34819
- PATCHhttps://github.com/ruby/net-imap/releases/tag/v0.4.24
- PATCHhttps://github.com/ruby/net-imap/releases/tag/v0.5.14
- PATCHhttps://github.com/ruby/net-imap/releases/tag/v0.6.4