GLSA-201702-15 : OCaml: Buffer overflow and information disclosure
Medium Nessus Plugin ID 97258
SynopsisThe remote Gentoo host is missing one or more security-related patches.
DescriptionThe remote host is affected by the vulnerability described in GLSA-201702-15 (OCaml: Buffer overflow and information disclosure)
It was discovered that OCaml was vulnerable to a runtime bug that, on 64-bit platforms, causes size arguments to internal memmove calls to be sign-extended from 32- to 64-bits before being passed to the memmove function. This leads to arguments between 2GiB and 4GiB being interpreted as larger than they are (specifically, a bit below 2^64), causing a buffer overflow. Further, arguments between 4GiB and 6GiB are interpreted as 4GiB smaller than they should be causing a possible information leak.
A remote attacker, able to interact with an OCaml-based application, could possibly obtain sensitive information or cause a Denial of Service condition.
There is no known workaround at this time.
SolutionAll OCaml users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=dev-lang/ocam-4.04.0' Packages which depend on OCaml may need to be recompiled. Tools such as qdepends (included in app-portage/portage-utils) may assist in identifying these packages:
# emerge --oneshot --ask --verbose $(qdepends -CQ dev-lang/ocaml | sed 's/^/=/')