GLSA-201701-31 : flex: Potential insecure code generation
High Nessus Plugin ID 96425
SynopsisThe remote Gentoo host is missing one or more security-related patches.
DescriptionThe remote host is affected by the vulnerability described in GLSA-201701-31 (flex: Potential insecure code generation)
A heap-based buffer overflow in the yy_get_next_buffer function in Flex might allow context-dependent attackers to cause a denial of service or possibly execute arbitrary code via vectors involving num_to_read.
Context-dependent attackers could cause a Denial of Service condition or possibly execute arbitrary code with the privileges of the process.
There is no known workaround at this time.
SolutionAll flex users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=sys-devel/flex-2.6.1' Packages which depend on flex 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 sys-devel/flex | sed 's/^/=/')