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Code Issues Releases Wiki Activity

(stable) Warn users about remote code execution in older Git

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Summary: Ref T10832. Raise a setup warning for out-of-date versions of `git`.

Test Plan: {F1224632}

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10832

Differential Revision: https://secure.phabricator.com/D15745
This commit is contained in:
epriestley 2016-04-18 05:38:09 -07:00
parent dfd6e50ec5
commit f75b1cf562
1 changed files with 60 additions and 66 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

126
src/applications/config/check/PhabricatorBinariesSetupCheck.php
View file

@ -102,15 +102,24 @@ final class PhabricatorBinariesSetupCheck extends PhabricatorSetupCheck {
$version = null;
switch ($vcs['versionControlSystem']) {
case PhabricatorRepositoryType::REPOSITORY_TYPE_GIT:
$minimum_version = null;
$bad_versions = array();
$bad_versions = array(
'< 2.7.4' => pht(
'Prior to 2.7.4, Git contains two remote code execution '.
'vulnerabilities which allow an attacker to take control of a '.
'system by crafting a commit which affects very long paths, '.
'then pushing it or tricking a victim into fetching it. This '.
'is a severe security vulnerability.'),
);
list($err, $stdout, $stderr) = exec_manual('git --version');
$version = trim(substr($stdout, strlen('git version ')));
break;
case PhabricatorRepositoryType::REPOSITORY_TYPE_SVN:
$minimum_version = '1.5';
$bad_versions = array(
'1.7.1' => pht(
// We need 1.5 for "--depth", see T7228.
'< 1.5' => pht(
'The minimum supported version of Subversion is 1.5, which '.
'was released in 2008.'),
'= 1.7.1' => pht(
'This version of Subversion has a bug where `%s` does not work '.
'for files added in rN (Subversion issue #2873), fixed in 1.7.2.',
'svn diff -c N'),
@ -119,12 +128,15 @@ final class PhabricatorBinariesSetupCheck extends PhabricatorSetupCheck {
$version = trim($stdout);
break;
case PhabricatorRepositoryType::REPOSITORY_TYPE_MERCURIAL:
$minimum_version = '1.9';
$bad_versions = array(
'2.1' => pht(
// We need 1.9 for HTTP cloning, see T3046.
'< 1.9' => pht(
'The minimum supported version of Mercurial is 1.9, which was '.
'released in 2011.'),
'= 2.1' => pht(
'This version of Mercurial returns a bad exit code '.
'after a successful pull.'),
'2.2' => pht(
'= 2.2' => pht(
'This version of Mercurial has a significant memory leak, fixed '.
'in 2.2.1. Pushing fails with this version as well; see %s.',
'T3046#54922'),
@ -136,20 +148,25 @@ final class PhabricatorBinariesSetupCheck extends PhabricatorSetupCheck {
if ($version === null) {
$this->raiseUnknownVersionWarning($binary);
} else {
if ($minimum_version &&
version_compare($version, $minimum_version, '<')) {
$this->raiseMinimumVersionWarning(
$binary,
$minimum_version,
$version);
$version_details = array();
foreach ($bad_versions as $spec => $details) {
list($operator, $bad_version) = explode(' ', $spec, 2);
$is_bad = version_compare($version, $bad_version, $operator);
if ($is_bad) {
$version_details[] = pht(
'(%s%s) %s',
$operator,
$bad_version,
$details);
}
}
foreach ($bad_versions as $bad_version => $details) {
if ($bad_version === $version) {
$this->raiseBadVersionWarning(
$binary,
$bad_version);
}
if ($version_details) {
$this->raiseBadVersionWarning(
$binary,
$version,
$version_details);
}
}
}
@ -223,57 +240,34 @@ final class PhabricatorBinariesSetupCheck extends PhabricatorSetupCheck {
pht('Report this Issue to the Upstream'));
}
private function raiseMinimumVersionWarning(
$binary,
$minimum_version,
$version) {
private function raiseBadVersionWarning($binary, $version, array $problems) {
$summary = pht(
'This server has a known bad version of "%s".',
$binary);
switch ($binary) {
case PhabricatorRepositoryType::REPOSITORY_TYPE_GIT:
break;
case PhabricatorRepositoryType::REPOSITORY_TYPE_SVN:
case PhabricatorRepositoryType::REPOSITORY_TYPE_MERCURIAL:
$summary = pht(
"The '%s' binary is version %s and Phabricator requires version ".
"%s or higher.",
$binary,
$version,
$minimum_version);
$message = pht(
"Please upgrade the '%s' binary to a more modern version.",
$binary);
$this->newIssue('bin.'.$binary)
->setShortName(pht("Unsupported '%s' Version", $binary))
->setName(pht("Unsupported '%s' Version", $binary))
->setSummary($summary)
->setMessage($summary.' '.$message);
break;
}
}
$message = array();
private function raiseBadVersionWarning($binary, $bad_version) {
switch ($binary) {
case PhabricatorRepositoryType::REPOSITORY_TYPE_GIT:
break;
case PhabricatorRepositoryType::REPOSITORY_TYPE_SVN:
case PhabricatorRepositoryType::REPOSITORY_TYPE_MERCURIAL:
$summary = pht(
"The '%s' binary is version %s which has bugs that break ".
"Phabricator.",
$binary,
$bad_version);
$message = pht(
"Please upgrade the '%s' binary to a more modern version.",
$binary);
$this->newIssue('bin.'.$binary)
->setShortName(pht("Unsupported '%s' Version", $binary))
->setName(pht("Unsupported '%s' Version", $binary))
->setSummary($summary)
->setMessage($summary.' '.$message);
break;
}
$message[] = pht(
'This server has a known bad version of "%s" installed ("%s"). This '.
'version is not supported, or contains important bugs or security '.
'vulnerabilities which are fixed in a newer version.',
$binary,
$version);
$message[] = pht('You should upgrade this software.');
$message[] = pht('The known issues with this old version are:');
foreach ($problems as $problem) {
$message[] = $problem;
}
$message = implode("\n\n", $message);
$this->newIssue("bin.{$binary}.bad-version")
->setName(pht('Unsupported/Insecure "%s" Version', $binary))
->setSummary($summary)
->setMessage($message);
}
}