diff options
Diffstat (limited to 'meta/recipes-extended/sudo/sudo/CVE-2022-43995.patch')
| -rw-r--r-- | meta/recipes-extended/sudo/sudo/CVE-2022-43995.patch | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/meta/recipes-extended/sudo/sudo/CVE-2022-43995.patch b/meta/recipes-extended/sudo/sudo/CVE-2022-43995.patch new file mode 100644 index 0000000000..1336c7701d --- /dev/null +++ b/meta/recipes-extended/sudo/sudo/CVE-2022-43995.patch @@ -0,0 +1,59 @@ +From e1554d7996a59bf69544f3d8dd4ae683027948f9 Mon Sep 17 00:00:00 2001 +From: Hitendra Prajapati <hprajapati@mvista.com> +Date: Tue, 15 Nov 2022 09:17:18 +0530 +Subject: [PATCH] CVE-2022-43995 + +Upstream-Status: Backport [https://github.com/sudo-project/sudo/commit/bd209b9f16fcd1270c13db27ae3329c677d48050] +CVE: CVE-2022-43995 +Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com> + +Potential heap overflow for passwords < 8 +characters. Starting with sudo 1.8.0 the plaintext password buffer is +dynamically sized so it is not safe to assume that it is at least 9 bytes in +size. +Found by Hugo Lefeuvre (University of Manchester) with ConfFuzz. +--- + plugins/sudoers/auth/passwd.c | 11 +++++------ + 1 file changed, 5 insertions(+), 6 deletions(-) + +diff --git a/plugins/sudoers/auth/passwd.c b/plugins/sudoers/auth/passwd.c +index 03c7a16..76a7824 100644 +--- a/plugins/sudoers/auth/passwd.c ++++ b/plugins/sudoers/auth/passwd.c +@@ -63,7 +63,7 @@ sudo_passwd_init(struct passwd *pw, sudo_auth *auth) + int + sudo_passwd_verify(struct passwd *pw, char *pass, sudo_auth *auth, struct sudo_conv_callback *callback) + { +- char sav, *epass; ++ char des_pass[9], *epass; + char *pw_epasswd = auth->data; + size_t pw_len; + int matched = 0; +@@ -75,12 +75,12 @@ sudo_passwd_verify(struct passwd *pw, char *pass, sudo_auth *auth, struct sudo_c + + /* + * Truncate to 8 chars if standard DES since not all crypt()'s do this. +- * If this turns out not to be safe we will have to use OS #ifdef's (sigh). + */ +- sav = pass[8]; + pw_len = strlen(pw_epasswd); +- if (pw_len == DESLEN || HAS_AGEINFO(pw_epasswd, pw_len)) +- pass[8] = '\0'; ++ if (pw_len == DESLEN || HAS_AGEINFO(pw_epasswd, pw_len)) { ++ strlcpy(des_pass, pass, sizeof(des_pass)); ++ pass = des_pass; ++ } + + /* + * Normal UN*X password check. +@@ -88,7 +88,6 @@ sudo_passwd_verify(struct passwd *pw, char *pass, sudo_auth *auth, struct sudo_c + * only compare the first DESLEN characters in that case. + */ + epass = (char *) crypt(pass, pw_epasswd); +- pass[8] = sav; + if (epass != NULL) { + if (HAS_AGEINFO(pw_epasswd, pw_len) && strlen(epass) == DESLEN) + matched = !strncmp(pw_epasswd, epass, DESLEN); +-- +2.25.1 + |