In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
s390\/zcrypt: Improve EP11 CPRB length and overflow checks<\/p>\n
The xcrb_msg_to_type6_ep11cprb_msgx() function lacks proper input
\nvalidation, creating security vulnerabilities:
\n1. Missing minimum size validation: The ep11_cprb structure and
\n subsequent payload fields (pld_tag, pld_lenfmt) are copied from
\n userspace without verifying sufficient buffer length.
\n2. Arithmetic overflow in length calculations: CEIL4 alignment could
\n overflow, bypassing size checks and enabling buffer overflows.
\n3. The payload is asn1 encoded but the function just uses a simple c
\n struct overlay to access some fields of the payload.<\/p>\n
Fix by using size_t for length calculations, adding U32_MAX boundary
\nchecks after alignment, and validating minimum request size and
\nminimum reply size before copying from userspace. Do a very simple
\nasn1 parsing of the payload up to the function value field.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
s390\/zcrypt: Improve EP11 CPRB length and overflow checks<\/p>\n
The xcrb_msg_to_type6_ep11cprb_msgx() function lacks proper input
\nvalida<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-11950","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/11950","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=11950"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11950"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11950"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}