关联漏洞
标题：
needrestart 安全漏洞
(CVE-2024-48990)
描述：needrestart是liske个人开发者的一款用于检查升级后需要重新启动哪些守护进程的工具。 needrestart 3.8之前版本存在安全漏洞，该漏洞源于允许本地攻击者通过诱骗needrestart使用攻击者控制的PYTHONPATH环境变量运行Python解释器，并以root身份执行任意代码。
介绍
========================================================================
CVE-2024-48990 (and CVE-2024-48992)
========================================================================
To determine whether a Python process (a process that is running the
Python interpreter) needs to be restarted, needrestart extracts the
PYTHONPATH environment variable from this process's /proc/pid/environ
(at line 193), sets this environment variable if it exists (at line
196), and executes Python ("$ptable->{exec}" at line 203) with a "-"
argument to read a short, hard-coded script from stdin (at line 204):
------------------------------------------------------------------------
""" perl
135 sub files {
136 my $self = shift;
137 my $pid = shift;
138 my $cache = shift;
139 my $ptable = nr_ptable_pid($pid);
...
193 my %e = nr_parse_env($pid);
194 local %ENV;
195 if(exists($e{PYTHONPATH})) {
196 $ENV{PYTHONPATH} = $e{PYTHONPATH};
197 }
...
203 my ($pyread, $pywrite) = nr_fork_pipe2($self->{debug}, $ptable->{exec}, '-');
204 print $pywrite "import sys\nprint(sys.path)\n";
205 close($pywrite);
"""
------------------------------------------------------------------------
Unfortunately, if a Python process belongs to a local attacker, then
needrestart executes Python (at line 203) with an attacker-controlled
PYTHONPATH environment variable, which allows the attacker to execute
arbitrary code as root (even though needrestart's hard-coded Python
script at line 204 is not attacker-controlled at all). This is
CVE-2024-48990.
文件快照
[4.0K] /data/pocs/41ae5c56fd45b1e61b8d9236f731bf0c7a8a607c
└── [1.5K] README.md
0 directories, 1 file
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