Signed-off-by: Vivek Kumbhar <vkumb...@mvista.com> --- .../libcap/files/CVE-2023-2603.patch | 60 +++++++++++++++++++ meta/recipes-support/libcap/libcap_2.66.bb | 1 + 2 files changed, 61 insertions(+) create mode 100644 meta/recipes-support/libcap/files/CVE-2023-2603.patch
diff --git a/meta/recipes-support/libcap/files/CVE-2023-2603.patch b/meta/recipes-support/libcap/files/CVE-2023-2603.patch new file mode 100644 index 0000000000..e09be78640 --- /dev/null +++ b/meta/recipes-support/libcap/files/CVE-2023-2603.patch @@ -0,0 +1,60 @@ +From 422bec25ae4a1ab03fd4d6f728695ed279173b18 Mon Sep 17 00:00:00 2001 +From: "Andrew G. Morgan" <mor...@kernel.org> +Date: Wed, 3 May 2023 19:44:22 -0700 +Subject: Large strings can confuse libcap's internal strdup code. + +Avoid something subtle with really long strings: 1073741823 should +be enough for anybody. This is an improved fix over something attempted +in libcap-2.55 to address some static analysis findings. + +Reviewing the library, cap_proc_root() and cap_launcher_set_chroot() +are the only two calls where the library is potentially exposed to a +user controlled string input. + +Credit for finding this bug in libcap goes to Richard Weinberger of +X41 D-Sec GmbH (https://x41-dsec.de/) who performed a security audit +of the libcap source code in April of 2023. The audit was sponsored +by the Open Source Technology Improvement Fund (https://ostif.org/). + +Audit ref: LCAP-CR-23-02 (CVE-2023-2603) + +Signed-off-by: Andrew G. Morgan <mor...@kernel.org> + +Upstream-Status: Backport [https://git.kernel.org/pub/scm/libs/libcap/libcap.git/commit/?id=422bec25ae4a1ab03fd4d6f728695ed279173b18] +CVE: CVE-2023-2603 +Signed-off-by: Vivek Kumbhar <vkumb...@mvista.com> + +--- + libcap/cap_alloc.c | 12 +++++++----- + 1 file changed, 7 insertions(+), 5 deletions(-) + +diff --git a/libcap/cap_alloc.c b/libcap/cap_alloc.c +index c826e7a..25f9981 100644 +--- a/libcap/cap_alloc.c ++++ b/libcap/cap_alloc.c +@@ -105,15 +105,17 @@ char *_libcap_strdup(const char *old) + errno = EINVAL; + return NULL; + } +- len = strlen(old) + 1 + 2*sizeof(__u32); +- if (len < sizeof(struct _cap_alloc_s)) { +- len = sizeof(struct _cap_alloc_s); +- } +- if ((len & 0xffffffff) != len) { ++ ++ len = strlen(old); ++ if ((len & 0x3fffffff) != len) { + _cap_debug("len is too long for libcap to manage"); + errno = EINVAL; + return NULL; + } ++ len += 1 + 2*sizeof(__u32); ++ if (len < sizeof(struct _cap_alloc_s)) { ++ len = sizeof(struct _cap_alloc_s); ++ } + + raw_data = calloc(1, len); + if (raw_data == NULL) { +-- +2.25.1 + diff --git a/meta/recipes-support/libcap/libcap_2.66.bb b/meta/recipes-support/libcap/libcap_2.66.bb index c50e9d8cc7..844ae58506 100644 --- a/meta/recipes-support/libcap/libcap_2.66.bb +++ b/meta/recipes-support/libcap/libcap_2.66.bb @@ -19,6 +19,7 @@ SRC_URI = "${KERNELORG_MIRROR}/linux/libs/security/linux-privs/${BPN}2/${BPN}-${ " SRC_URI:append:class-nativesdk = " \ file://0001-nativesdk-libcap-Raise-the-size-of-arrays-containing.patch \ + file://CVE-2023-2603.patch \ " SRC_URI[sha256sum] = "15c40ededb3003d70a283fe587a36b7d19c8b3b554e33f86129c059a4bb466b2" -- 2.25.1
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