CVSROOT: /cvs
Module name: src
Changes by: [email protected] 2025/07/30 20:02:35
Modified files:
lib/libcrypto/pkcs7: pk7_attr.c
lib/libcrypto/ts: ts_rsp_sign.c
Log message:
Plug leaks due to misuse of PKCS7_add_signed_attribute()
set0/add0 functions that can fail are the worst. Without fail this trips
up both users and authors (by and large these are two identical groups
consisting of a single person), resulting in leaks and double frees.
In today's episode of spelunking in the gruesome gore provided by the
PKCS#7 and Time-Stamp protocol "implementations", we fix a couple of
leaks in PKCS7_add_attrib_smimecap() and ESS_add_signing_cert().
We do so by recalling that there is i2d_X509_ALGORS(), so we might
as well put it to use instead of inlining it poorly (aka, without
error checking). Normalize said error checking and ensure ownership
is handled correctly in the usual single-exit idiom.
ESS_add_signing_cert() can also make use of proper i2d handling, so
it's simpler and correct and in the end looks pretty much the same
as PKCS7_add_attrib_smimecap().
ok kenjiro
