diff options
Diffstat (limited to 'meta/recipes-support/libcap/files/CVE-2023-2603.patch')
-rw-r--r-- | meta/recipes-support/libcap/files/CVE-2023-2603.patch | 58 |
1 files changed, 58 insertions, 0 deletions
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..cf86ac2a46 --- /dev/null +++ b/meta/recipes-support/libcap/files/CVE-2023-2603.patch @@ -0,0 +1,58 @@ +Backport of: + +From 422bec25ae4a1ab03fd4d6f728695ed279173b18 Mon Sep 17 00:00:00 2001 +From: "Andrew G. Morgan" <morgan@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 <morgan@kernel.org> + +Upstream-Status: Backport [import from ubuntu https://git.launchpad.net/ubuntu/+source/libcap2/tree/debian/patches/CVE-2023-2603.patch?h=ubuntu/focal-security +Upstream commit https://git.kernel.org/pub/scm/libs/libcap/libcap.git/commit/?id=422bec25ae4a1ab03fd4d6f728695ed279173b18] +CVE: CVE-2023-2603 +Signed-off-by: Vijay Anusuri <vanusuri@mvista.com> +--- + libcap/cap_alloc.c | 12 +++++++----- + 1 file changed, 7 insertions(+), 5 deletions(-) + +--- a/libcap/cap_alloc.c ++++ b/libcap/cap_alloc.c +@@ -76,13 +76,22 @@ cap_t cap_init(void) + char *_libcap_strdup(const char *old) + { + __u32 *raw_data; ++ size_t len; + + if (old == NULL) { + errno = EINVAL; + return NULL; + } + +- raw_data = malloc( sizeof(__u32) + strlen(old) + 1 ); ++ len = strlen(old); ++ if ((len & 0x3fffffff) != len) { ++ _cap_debug("len is too long for libcap to manage"); ++ errno = EINVAL; ++ return NULL; ++ } ++ len += sizeof(__u32) + 1; ++ ++ raw_data = malloc(len); + if (raw_data == NULL) { + errno = ENOMEM; + return NULL; |