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d="scan'208";a="530772614" Received: from rcdn-l-core-09.cisco.com ([173.37.255.146]) by rcdn-iport-2.cisco.com with ESMTP/TLS/TLS_AES_256_GCM_SHA384; 06 Nov 2026 09:21:25 +0000 Received: from sjc-ads-7857.cisco.com (sjc-ads-7857.cisco.com [10.30.222.144]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "ciscoit-managed-infra-smtp-auth.cisco.com", Issuer "Internal Private TLS SubCA" (verified OK)) by rcdn-l-core-09.cisco.com (Postfix) with ESMTPS id 86C141800023D for ; Fri, 6 Nov 2026 09:21:25 +0000 (GMT) Received: by sjc-ads-7857.cisco.com (Postfix, from userid 1887505) id 2CE5CCBEF5A; Fri, 6 Nov 2026 01:21:25 -0800 (PST) From: "Hetvi Thakar -X (hthakar - E INFOCHIPS PRIVATE LIMITED at Cisco)" To: openembedded-core@lists.openembedded.org Subject: [OE-core][blacksail][PATCH 2/3] lrzsz: fix CVE-2026-105840 Date: Fri, 6 Nov 2026 01:21:24 -0800 Message-Id: <20261106092125.2587191-2-hthakar@cisco.com> X-Mailer: git-send-email 2.35.6 In-Reply-To: <20261106092125.2587191-1-hthakar@cisco.com> References: <20261106092125.2587191-1-hthakar@cisco.com> MIME-Version: 1.0 X-Outbound-Client-TLS: VERIFIED;sjc-ads-7857.cisco.com [10.30.222.144];TLSv1.3;TLS_AES_256_GCM_SHA384;256;ciscoit-managed-infra-smtp-auth.cisco.com X-Outbound-SMTP-Client: 10.30.222.144, sjc-ads-7857.cisco.com X-Outbound-Node: rcdn-l-core-09.cisco.com List-Id: X-Webhook-Received: from 45-33-107-173.ip.linodeusercontent.com [45.33.107.173] by lin-tor-korg-lkml-alma10-1 with HTTPS for ; Fri, 06 Nov 2026 09:21:33 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/249625 From: Hetvi Thakar When built without PUBDIR support, lrz does not reject absolute pathnames in restricted mode. A malicious sender can therefore write outside the receive directory, subject to the receiving user's filesystem permissions. Backport upstream commit [1], which removes PUBDIR support and makes absolute-path rejection unconditional in the restricted-mode checks, addressing the vulnerability described in [2]. [1] https://github.com/UweOhse/lrzsz/commit/b1fc8a01e3a074f8462a29dca45ed7c8fd2ef665 [2] https://security-tracker.debian.org/tracker/CVE-2026-105840 Signed-off-by: Hetvi Thakar --- .../lrzsz/lrzsz-0.12.20/CVE-2026-105840.patch | 105 ++++++++++++++++++ meta/recipes-bsp/lrzsz/lrzsz_0.12.20.bb | 1 + 2 files changed, 106 insertions(+) create mode 100644 meta/recipes-bsp/lrzsz/lrzsz-0.12.20/CVE-2026-105840.patch diff --git a/meta/recipes-bsp/lrzsz/lrzsz-0.12.20/CVE-2026-105840.patch b/meta/recipes-bsp/lrzsz/lrzsz-0.12.20/CVE-2026-105840.patch new file mode 100644 index 0000000000..e9820e3a4d --- /dev/null +++ b/meta/recipes-bsp/lrzsz/lrzsz-0.12.20/CVE-2026-105840.patch @@ -0,0 +1,105 @@ +From b1fc8a01e3a074f8462a29dca45ed7c8fd2ef665 Mon Sep 17 00:00:00 2001 +From: Uwe Ohse at akiar +Date: Mon, 10 Aug 2026 18:09:20 +0200 +Subject: [PATCH] remove PUBDIR, fix the 2nd security hole found by + tristaninsec + +CVE: CVE-2026-105840 +Upstream-Status: Backport [https://github.com/UweOhse/lrzsz/commit/b1fc8a01e3a074f8462a29dca45ed7c8fd2ef665] + +Backport Changes: +- Applied the configure.ac change to configure.in, which is the build + configuration filename used by lrzsz 0.12.20. +- Omitted NEWS because its 0.13.0 release-note hunk conflicts with the + 0.12.20 release history and is not needed for the security fix. + +Signed-off-by: Hetvi Thakar +--- + configure.in | 7 ------- + src/lrz.c | 16 +++++----------- + src/lsz.c | 9 ++------- + 3 files changed, 7 insertions(+), 25 deletions(-) + +diff --git a/configure.in b/configure.in +index b7c3c31..504bd32 100644 +--- a/configure.in ++++ b/configure.in +@@ -37,13 +37,6 @@ AC_ARG_ENABLE(timesync, + fi], + [AC_DEFINE(ENABLE_TIMESYNC)]) + AC_SUBST(ENABLE_TIMESYNC) +-AC_ARG_ENABLE(pubdir, +- [--enable-pubdir=/path include support for a public writeable directory], +- [if test "$enableval" = "no" ; then +- : +- else +- AC_DEFINE_UNQUOTED(PUBDIR,"$enableval") +- fi]) + AC_ARG_ENABLE(mkdir, + [--disable-mkdir disable support for creating directories (lrz)], + [if test "$enableval" = "no" ; then +diff --git a/src/lrz.c b/src/lrz.c +index 9c08a3d..168636e 100644 +--- a/src/lrz.c ++++ b/src/lrz.c +@@ -1553,12 +1553,10 @@ chkinvok(const char *s) + } + +-/* +- * Totalitarian Communist pathname processing +- */ + static void + checkpath(const char *name) + { + if (Restricted) { ++ FILE *noleak = NULL; + const char *p; + p=strrchr(name,'/'); + if (p) +@@ -1595,20 +1593,16 @@ checkpath(const char *name) + p=name; + /* don't overwrite any file in very restricted mode. + * don't overwrite hidden files in restricted mode */ +- if ((Restricted==2 || *name=='.') && fopen(name, "r") != NULL) { ++ if ((Restricted==2 || *name=='.') && (noleak = fopen(name, "r")) != NULL) { ++ fclose(noleak); + canit(STDOUT_FILENO); + vstring("\r\n"); + vstringf(_("%s: %s exists\n"), + program_name, name); + bibi(-1); + } +- /* restrict pathnames to current tree or uucppublic */ +- if ( strstr(name, "../") +-#ifdef PUBDIR +- || (name[0]== '/' && strncmp(name, PUBDIR, +- strlen(PUBDIR))) +-#endif +- ) { ++ /* restrict pathnames to the current tree */ ++ if ( strstr(name, "../") || name[0] == '/') { + canit(STDOUT_FILENO); + vstring("\r\n"); + vstringf(_("%s:\tSecurity Violation"),program_name); +diff --git a/src/lsz.c b/src/lsz.c +index 69f4fb8..3dd91b1 100644 +--- a/src/lsz.c ++++ b/src/lsz.c +@@ -1009,13 +1009,8 @@ wcs(const char *oname, const char *remotename) + + + if (Restricted) { +- /* restrict pathnames to current tree or uucppublic */ +- if ( strstr(oname, "../") +-#ifdef PUBDIR +- || (oname[0]== '/' && strncmp(oname, MK_STRING(PUBDIR), +- strlen(MK_STRING(PUBDIR)))) +-#endif +- ) { ++ /* restrict pathnames to current tree */ ++ if ( strstr(oname, "../") || oname[0] == '/') { + canit(STDOUT_FILENO); + vchar('\r'); + error(1,0, +-- +2.35.6 diff --git a/meta/recipes-bsp/lrzsz/lrzsz_0.12.20.bb b/meta/recipes-bsp/lrzsz/lrzsz_0.12.20.bb index 403266743e..ec98f69015 100644 --- a/meta/recipes-bsp/lrzsz/lrzsz_0.12.20.bb +++ b/meta/recipes-bsp/lrzsz/lrzsz_0.12.20.bb @@ -22,6 +22,7 @@ SRC_URI = "https://www.ohse.de/uwe/releases/lrzsz-${PV}.tar.gz \ file://0001-Fix-build-with-GCC-15.patch \ file://0001-lrzsz-convert-K-R-function-definitions-to-ANSI-C-pro.patch \ file://CVE-2026-105841.patch \ + file://CVE-2026-105840.patch \ " SRC_URI[sha256sum] = "c28b36b14bddb014d9e9c97c52459852f97bd405f89113f30bee45ed92728ff1"