diff options
Diffstat (limited to 'meta/recipes-support/libksba/libksba/CVE-2022-3515.patch')
-rw-r--r-- | meta/recipes-support/libksba/libksba/CVE-2022-3515.patch | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/meta/recipes-support/libksba/libksba/CVE-2022-3515.patch b/meta/recipes-support/libksba/libksba/CVE-2022-3515.patch new file mode 100644 index 0000000000..ff9f2f9275 --- /dev/null +++ b/meta/recipes-support/libksba/libksba/CVE-2022-3515.patch @@ -0,0 +1,47 @@ +From 4b7d9cd4a018898d7714ce06f3faf2626c14582b Mon Sep 17 00:00:00 2001 +From: Werner Koch <wk@gnupg.org> +Date: Wed, 5 Oct 2022 14:19:06 +0200 +Subject: [PATCH] Detect a possible overflow directly in the TLV parser. + +* src/ber-help.c (_ksba_ber_read_tl): Check for overflow of a commonly +used sum. +-- + +It is quite common to have checks like + + if (ti.nhdr + ti.length >= DIM(tmpbuf)) + return gpg_error (GPG_ERR_TOO_LARGE); + +This patch detects possible integer overflows immmediately when +creating the TI object. + +Reported-by: ZDI-CAN-18927, ZDI-CAN-18928, ZDI-CAN-18929 + + +Upstream-Status: Backport [https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libksba.git;a=patch;h=4b7d9cd4a018898d7714ce06f3faf2626c14582b] +CVE: CVE-2022-3515 +Signed-off-by: Chee Yang Lee <chee.yang.lee@intel.com> +--- + src/ber-help.c | 6 ++++++ + 1 file changed, 6 insertions(+) + +diff --git a/src/ber-help.c b/src/ber-help.c +index 81c31ed..56efb6a 100644 +--- a/src/ber-help.c ++++ b/src/ber-help.c +@@ -182,6 +182,12 @@ _ksba_ber_read_tl (ksba_reader_t reader, struct tag_info *ti) + ti->length = len; + } + ++ if (ti->length > ti->nhdr && (ti->nhdr + ti->length) < ti->length) ++ { ++ ti->err_string = "header+length would overflow"; ++ return gpg_error (GPG_ERR_EOVERFLOW); ++ } ++ + /* Without this kludge some example certs can't be parsed */ + if (ti->class == CLASS_UNIVERSAL && !ti->tag) + ti->length = 0; +-- +2.11.0 + |