GLSA-201702-15 : OCaml: Buffer overflow and information disclosure

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

The remote Gentoo host is missing one or more security-related
patches.

Description :

The 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.

Impact :

A remote attacker, able to interact with an OCaml-based application,
could possibly obtain sensitive information or cause a Denial of Service
condition.

Workaround :

There is no known workaround at this time.

See also :

https://security.gentoo.org/glsa/201702-15

Solution :

All 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/^/=/')

Risk factor :

Medium / CVSS Base Score : 6.4
(CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:P)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 97258 ()

Bugtraq ID:

CVE ID: CVE-2015-8869

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