Change #246796

Comments

pop3: fix CAPA response termination detection
The code was checking if a line starts with '.', which would
incorrectly match capability names starting with dots. Per RFC 2449,
the terminator must be a line containing only a single dot.

RFC 2449 also explicitly excludes '.' from valid capability name
starting characters, so this is purely theoretical, but the code
should match the spec.

Changed to check for exact match: line length of 3 with '.\r' or
length 2 with '.\n' to handle both CRLF and LF-only servers.

(Mistake detected with ZeroPath)

Fixes #19228
Reported-by: Joshua Rogers
Closes #19245

Changed files

• lib/pop3.c