GLSA-200810-03 : libspf2: DNS response buffer overflow
Critical Nessus Plugin ID 34678
SynopsisThe remote Gentoo host is missing one or more security-related patches.
DescriptionThe remote host is affected by the vulnerability described in GLSA-200810-03 (libspf2: DNS response buffer overflow)
libspf2 uses a fixed-length buffer to receive DNS responses and does not properly check the length of TXT records, leading to buffer overflows.
A remote attacker could store a specially crafted DNS entry and entice a user or automated system using libspf2 to lookup that SPF entry (e.g.
by sending an email to the MTA), possibly allowing for the execution of arbitrary code.
There is no known workaround at this time.
SolutionAll libspf2 users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=mail-filter/libspf2-1.2.8'