From: Bhabu Bindu <bhabu.bi...@kpit.com> Add patch to fix CVE-2023-28319
UAF in SSH sha256 fingerprint check libcurl offers a feature to verify an SSH server's public key using a SHA 256hash. When this check fails, libcurl would free the memory for the fingerprintbefore it returns an error message containing the (now freed) hash. This flaw risks inserting sensitive heap-based data into the error message that might be shown to users or otherwise get leaked and revealed. Link: https://curl.se/docs/CVE-2023-28319.html Signed-off-by: Bhabu Bindu <bhabu.bi...@kpit.com> --- .../curl/curl/CVE-2023-28319.patch | 33 +++++++++++++++++++ meta/recipes-support/curl/curl_7.82.0.bb | 1 + 2 files changed, 34 insertions(+) create mode 100644 meta/recipes-support/curl/curl/CVE-2023-28319.patch diff --git a/meta/recipes-support/curl/curl/CVE-2023-28319.patch b/meta/recipes-support/curl/curl/CVE-2023-28319.patch new file mode 100644 index 0000000000..c0bca9a56e --- /dev/null +++ b/meta/recipes-support/curl/curl/CVE-2023-28319.patch @@ -0,0 +1,33 @@ +From 8e21b1a05f3c0ee098dbcb6c3d84cb61f102a122 Mon Sep 17 00:00:00 2001 +From: Daniel Stenberg <dan...@haxx.se> +Date: Mon, 8 May 2023 14:33:54 +0200 +Subject: [PATCH] libssh2: free fingerprint better + +Reported-by: Wei Chong Tan +Closes #11088 + +CVE: CVE-2023-28319 +Upstream-Status: Backport [https://github.com/curl/curl/commit/8e21b1a05f3c0ee098dbcb6c] +Comments: Hunks Refreshed +Signed-off-by: Bhabu Bindu <bhabu.bi...@kpit.com> +--- + lib/vssh/libssh2.c | 3 +-- + 1 file changed, 1 insertion(+), 2 deletions(-) + +diff --git a/lib/vssh/libssh2.c b/lib/vssh/libssh2.c +index bfcc94e160178..dd39a844c646b 100644 +--- a/lib/vssh/libssh2.c ++++ b/lib/vssh/libssh2.c +@@ -695,11 +695,10 @@ + */ + if((pub_pos != b64_pos) || + Curl_strncasecompare(fingerprint_b64, pubkey_sha256, pub_pos) != 1) { +- free(fingerprint_b64); +- + failf(data, + "Denied establishing ssh session: mismatch sha256 fingerprint. " + "Remote %s is not equal to %s", fingerprint_b64, pubkey_sha256); ++ free(fingerprint_b64); + state(data, SSH_SESSION_FREE); + sshc->actualcode = CURLE_PEER_FAILED_VERIFICATION; + return sshc->actualcode; diff --git a/meta/recipes-support/curl/curl_7.82.0.bb b/meta/recipes-support/curl/curl_7.82.0.bb index 70ceb9f370..e38bf14cc4 100644 --- a/meta/recipes-support/curl/curl_7.82.0.bb +++ b/meta/recipes-support/curl/curl_7.82.0.bb @@ -45,6 +45,7 @@ SRC_URI = "https://curl.se/download/${BP}.tar.xz \ file://CVE-2023-27535-pre1.patch \ file://CVE-2023-27535_and_CVE-2023-27538.patch \ file://CVE-2023-27536.patch \ + file://CVE-2023-28319.patch \ " SRC_URI[sha256sum] = "0aaa12d7bd04b0966254f2703ce80dd5c38dbbd76af0297d3d690cdce58a583c" -- 2.25.1
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