A vulnerabiliy was found in xsltCopyText in transform.c in libxslt 1.1.33, a pointer variable isn't reset under certain circumstances. If the relevant memory area happened to be freed and reused in a certain way, a bounds check could fail and memory outside a buffer could be written to, or uninitialized data could be disclosed. Reference: https://security.netapp.com/advisory/ntap-20191031-0004/ https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15746 https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15768 https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15914 https://gitlab.gnome.org/GNOME/libxslt/commit/2232473733b7313d67de8836ea3b29eec6e8e285
Created libxslt tracking bugs for this issue: Affects: fedora-all [bug 1770770] Created mingw-libxslt tracking bugs for this issue: Affects: epel-7 [bug 1770772]
Created libxslt tracking bugs for this issue: Affects: fedora-all [bug 1770773] Created mingw-libxslt tracking bugs for this issue: Affects: fedora-all [bug 1770774]
This is basically a use-after-free error that only happened when a node's text content was freed and the same memory area was reused for another node's text content. In glibc's memory allocator it causes either use-of-uninitialized-value or causes an abort.
Statement: Red Hat OpenStack consumes fixes from the base Red Hat Enterprise Linux Operating System. Therefore the libxslt package provided by Red Hat OpenStack has been marked as 'will not fix'.
This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Supplementary Via RHSA-2020:0514 https://access.redhat.com/errata/RHSA-2020:0514
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2019-18197
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2020:4005 https://access.redhat.com/errata/RHSA-2020:4005
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2020:4464 https://access.redhat.com/errata/RHSA-2020:4464