mirror of
https://github.com/archlinuxarm/PKGBUILDs.git
synced 2024-10-29 22:43:48 +00:00
60 lines
2.2 KiB
Diff
60 lines
2.2 KiB
Diff
From deac9731884a83ad91eab9f27b288f406f56c87b Mon Sep 17 00:00:00 2001
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From: Levente Polyak <anthraxx@archlinux.org>
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Date: Sat, 18 Jul 2015 17:58:23 +0200
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Subject: [PATCH] ensure matching database and package version
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While loading each package ensure that the internal version matches the
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expected database version to avoid the possibility to circumvent the
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version check.
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This issue can be used by an attacker to trick the software into
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installing an older version. The behavior can be exploited by a
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man-in-the-middle attack through specially crafted database tarball
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containing a higher version, yet actually delivering an older and
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vulnerable version, which was previously shipped.
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Signed-off-by: Levente Polyak <anthraxx@archlinux.org>
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Signed-off-by: Remi Gacogne <rgacogne@archlinux.org>
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Signed-off-by: Allan McRae <allan@archlinux.org>
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---
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lib/libalpm/sync.c | 18 ++++++++++++++++++
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1 file changed, 18 insertions(+)
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diff --git a/lib/libalpm/sync.c b/lib/libalpm/sync.c
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index 888ae15..e843b07 100644
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--- a/lib/libalpm/sync.c
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+++ b/lib/libalpm/sync.c
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@@ -1212,6 +1212,7 @@ static int load_packages(alpm_handle_t *handle, alpm_list_t **data,
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EVENT(handle, &event);
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for(i = handle->trans->add; i; i = i->next, current++) {
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+ int error = 0;
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alpm_pkg_t *spkg = i->data;
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char *filepath;
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int percent = (int)(((double)current_bytes / total_bytes) * 100);
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@@ -1232,6 +1233,23 @@ static int load_packages(alpm_handle_t *handle, alpm_list_t **data,
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spkg->name);
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alpm_pkg_t *pkgfile =_alpm_pkg_load_internal(handle, filepath, 1);
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if(!pkgfile) {
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+ _alpm_log(handle, ALPM_LOG_DEBUG, "failed to load pkgfile internal\n");
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+ error = 1;
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+ } else {
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+ if(strcmp(spkg->name, pkgfile->name) != 0) {
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+ _alpm_log(handle, ALPM_LOG_DEBUG,
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+ "internal package name mismatch, expected: '%s', actual: '%s'\n",
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+ spkg->name, pkgfile->name);
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+ error = 1;
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+ }
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+ if(strcmp(spkg->version, pkgfile->version) != 0) {
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+ _alpm_log(handle, ALPM_LOG_DEBUG,
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+ "internal package version mismatch, expected: '%s', actual: '%s'\n",
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+ spkg->version, pkgfile->version);
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+ error = 1;
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+ }
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+ }
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+ if(error != 0) {
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errors++;
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*data = alpm_list_add(*data, strdup(spkg->filename));
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free(filepath);
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--
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2.4.6
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