From ef16919e98108724ede5ad5d79e3cbab1918d6d5 Mon Sep 17 00:00:00 2001 From: Xiangyu Chen Date: Wed, 19 Apr 2023 13:43:35 +0800 Subject: shadow: backport patch to fix CVE-2023-29383 The fix of CVE-2023-29383.patch contains a bug that it rejects all characters that are not control ones, so backup another patch named "0001-Overhaul-valid_field.patch" from upstream to fix it. (From OE-Core rev: c5da9027cc73484936f4f82a37c32348cee1e229) Signed-off-by: Xiangyu Chen Signed-off-by: Luca Ceresoli Signed-off-by: Richard Purdie --- .../shadow/files/0001-Overhaul-valid_field.patch | 65 ++++++++++++++++++++++ .../shadow/files/CVE-2023-29383.patch | 53 ++++++++++++++++++ meta/recipes-extended/shadow/shadow.inc | 2 + 3 files changed, 120 insertions(+) create mode 100644 meta/recipes-extended/shadow/files/0001-Overhaul-valid_field.patch create mode 100644 meta/recipes-extended/shadow/files/CVE-2023-29383.patch (limited to 'meta/recipes-extended/shadow') diff --git a/meta/recipes-extended/shadow/files/0001-Overhaul-valid_field.patch b/meta/recipes-extended/shadow/files/0001-Overhaul-valid_field.patch new file mode 100644 index 0000000000..ac08be515b --- /dev/null +++ b/meta/recipes-extended/shadow/files/0001-Overhaul-valid_field.patch @@ -0,0 +1,65 @@ +From 2eaea70111f65b16d55998386e4ceb4273c19eb4 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Christian=20G=C3=B6ttsche?= +Date: Fri, 31 Mar 2023 14:46:50 +0200 +Subject: [PATCH] Overhaul valid_field() + +e5905c4b ("Added control character check") introduced checking for +control characters but had the logic inverted, so it rejects all +characters that are not control ones. + +Cast the character to `unsigned char` before passing to the character +checking functions to avoid UB. + +Use strpbrk(3) for the illegal character test and return early. + +Upstream-Status: Backport [https://github.com/shadow-maint/shadow/commit/2eaea70111f65b16d55998386e4ceb4273c19eb4] + +Signed-off-by: Xiangyu Chen +--- + lib/fields.c | 24 ++++++++++-------------- + 1 file changed, 10 insertions(+), 14 deletions(-) + +diff --git a/lib/fields.c b/lib/fields.c +index fb51b582..53929248 100644 +--- a/lib/fields.c ++++ b/lib/fields.c +@@ -37,26 +37,22 @@ int valid_field (const char *field, const char *illegal) + + /* For each character of field, search if it appears in the list + * of illegal characters. */ ++ if (illegal && NULL != strpbrk (field, illegal)) { ++ return -1; ++ } ++ ++ /* Search if there are non-printable or control characters */ + for (cp = field; '\0' != *cp; cp++) { +- if (strchr (illegal, *cp) != NULL) { ++ unsigned char c = *cp; ++ if (!isprint (c)) { ++ err = 1; ++ } ++ if (iscntrl (c)) { + err = -1; + break; + } + } + +- if (0 == err) { +- /* Search if there are non-printable or control characters */ +- for (cp = field; '\0' != *cp; cp++) { +- if (!isprint (*cp)) { +- err = 1; +- } +- if (!iscntrl (*cp)) { +- err = -1; +- break; +- } +- } +- } +- + return err; + } + +-- +2.34.1 + diff --git a/meta/recipes-extended/shadow/files/CVE-2023-29383.patch b/meta/recipes-extended/shadow/files/CVE-2023-29383.patch new file mode 100644 index 0000000000..f53341d3fc --- /dev/null +++ b/meta/recipes-extended/shadow/files/CVE-2023-29383.patch @@ -0,0 +1,53 @@ +From e5905c4b84d4fb90aefcd96ee618411ebfac663d Mon Sep 17 00:00:00 2001 +From: tomspiderlabs <128755403+tomspiderlabs@users.noreply.github.com> +Date: Thu, 23 Mar 2023 23:39:38 +0000 +Subject: [PATCH] Added control character check + +Added control character check, returning -1 (to "err") if control characters are present. + +CVE: CVE-2023-29383 +Upstream-Status: Backport + +Reference to upstream: +https://github.com/shadow-maint/shadow/commit/e5905c4b84d4fb90aefcd96ee618411ebfac663d + +Signed-off-by: Xiangyu Chen +--- + lib/fields.c | 11 +++++++---- + 1 file changed, 7 insertions(+), 4 deletions(-) + +diff --git a/lib/fields.c b/lib/fields.c +index 640be931..fb51b582 100644 +--- a/lib/fields.c ++++ b/lib/fields.c +@@ -21,9 +21,9 @@ + * + * The supplied field is scanned for non-printable and other illegal + * characters. +- * + -1 is returned if an illegal character is present. +- * + 1 is returned if no illegal characters are present, but the field +- * contains a non-printable character. ++ * + -1 is returned if an illegal or control character is present. ++ * + 1 is returned if no illegal or control characters are present, ++ * but the field contains a non-printable character. + * + 0 is returned otherwise. + */ + int valid_field (const char *field, const char *illegal) +@@ -45,10 +45,13 @@ int valid_field (const char *field, const char *illegal) + } + + if (0 == err) { +- /* Search if there are some non-printable characters */ ++ /* Search if there are non-printable or control characters */ + for (cp = field; '\0' != *cp; cp++) { + if (!isprint (*cp)) { + err = 1; ++ } ++ if (!iscntrl (*cp)) { ++ err = -1; + break; + } + } +-- +2.34.1 + diff --git a/meta/recipes-extended/shadow/shadow.inc b/meta/recipes-extended/shadow/shadow.inc index 52b10000ee..cf05a3af93 100644 --- a/meta/recipes-extended/shadow/shadow.inc +++ b/meta/recipes-extended/shadow/shadow.inc @@ -15,6 +15,8 @@ SRC_URI = "${GITHUB_BASE_URI}/download/${PV}/${BP}.tar.gz \ ${@bb.utils.contains('PACKAGECONFIG', 'pam', '${PAM_SRC_URI}', '', d)} \ file://useradd \ file://0001-Fix-can-not-print-full-login.patch \ + file://CVE-2023-29383.patch \ + file://0001-Overhaul-valid_field.patch \ " SRC_URI:append:class-target = " \ -- cgit v1.2.3-54-g00ecf