diff options
Diffstat (limited to 'meta-openembedded/meta-oe/recipes-dbs/postgresql/files/0001-Properly-NULL-terminate-GSS-receive-buffer-on-error-.patch')
| -rw-r--r-- | meta-openembedded/meta-oe/recipes-dbs/postgresql/files/0001-Properly-NULL-terminate-GSS-receive-buffer-on-error-.patch | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/meta-openembedded/meta-oe/recipes-dbs/postgresql/files/0001-Properly-NULL-terminate-GSS-receive-buffer-on-error-.patch b/meta-openembedded/meta-oe/recipes-dbs/postgresql/files/0001-Properly-NULL-terminate-GSS-receive-buffer-on-error-.patch new file mode 100644 index 0000000000..2d11b18883 --- /dev/null +++ b/meta-openembedded/meta-oe/recipes-dbs/postgresql/files/0001-Properly-NULL-terminate-GSS-receive-buffer-on-error-.patch @@ -0,0 +1,50 @@ +From 586b074026d703c29057b04b1318e984701fe195 Mon Sep 17 00:00:00 2001 +From: Changqing Li <changqing.li@windriver.com> +Date: Thu, 2 Mar 2023 19:10:47 +0800 +Subject: [PATCH] Properly NULL-terminate GSS receive buffer on error packet + reception + +pqsecure_open_gss() includes a code path handling error messages with +v2-style protocol messages coming from the server. The client-side +buffer holding the error message does not force a NULL-termination, with +the data of the server getting copied to the errorMessage of the +connection. Hence, it would be possible for a server to send an +unterminated string and copy arbitrary bytes in the buffer receiving the +error message in the client, opening the door to a crash or even data +exposure. + +As at this stage of the authentication process the exchange has not been +completed yet, this could be abused by an attacker without Kerberos +credentials. Clients that have a valid kerberos cache are vulnerable as +libpq opportunistically requests for it except if gssencmode is +disabled. + +Author: Jacob Champion +Backpatch-through: 12 +Security: CVE-2022-41862 + +Upstream-Status: Backport [https://github.com/postgres/postgres/commit/71c37797d7bd78266146a5829ab62b3687c47295] +CVE: CVE-2022-41862 + +Signed-off-by: Changqing Li <changqing.li@windriver.com> +--- + src/interfaces/libpq/fe-secure-gssapi.c | 3 ++- + 1 file changed, 2 insertions(+), 1 deletion(-) + +diff --git a/src/interfaces/libpq/fe-secure-gssapi.c b/src/interfaces/libpq/fe-secure-gssapi.c +index c783a53..a42ebc0 100644 +--- a/src/interfaces/libpq/fe-secure-gssapi.c ++++ b/src/interfaces/libpq/fe-secure-gssapi.c +@@ -577,7 +577,8 @@ pqsecure_open_gss(PGconn *conn) + return result; + + PqGSSRecvLength += ret; +- ++ Assert(PqGSSRecvLength < PQ_GSS_RECV_BUFFER_SIZE); ++ PqGSSRecvBuffer[PqGSSRecvLength] = '\0'; + appendPQExpBuffer(&conn->errorMessage, "%s\n", PqGSSRecvBuffer + 1); + + return PGRES_POLLING_FAILED; +-- +2.25.1 + |