CVE-2024-50048

一、漏洞信息
 漏洞编号：[CVE-2024-50048](https://nvd.nist.gov/vuln/detail/CVE-2024-50048)
 漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)
 漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0,6.6.0
 CVSS V3.0分值：
  BaseScore：5.5 Medium
  Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:fbcon: Fix a NULL pointer dereference issue in fbcon_putcssyzbot has found a NULL pointer dereference bug in fbcon.Here is the simplified C reproducer:struct param {	uint8_t type;	struct tiocl_selection ts;};int main(){	struct fb_con2fbmap con2fb;	struct param param;	int fd = open( /dev/fb1 , 0, 0);	con2fb.console = 0x19;	con2fb.framebuffer = 0;	ioctl(fd, FBIOPUT_CON2FBMAP, &con2fb);	param.type = 2;	param.ts.xs = 0; param.ts.ys = 0;	param.ts.xe = 0; param.ts.ye = 0;	param.ts.sel_mode = 0;	int fd1 = open( /dev/tty1 , O_RDWR, 0);	ioctl(fd1, TIOCLINUX, &param);	con2fb.console = 1;	con2fb.framebuffer = 0;	ioctl(fd, FBIOPUT_CON2FBMAP, &con2fb);	return 0;}After calling ioctl(fd1, TIOCLINUX, &param), the subsequent ioctl(fd, FBIOPUT_CON2FBMAP, &con2fb)causes the kernel to follow a different execution path: set_con2fb_map  -> con2fb_init_display   -> fbcon_set_disp    -> redraw_screen     -> hide_cursor      -> clear_selection       -> highlight        -> invert_screen         -> do_update_region          -> fbcon_putcs           -> ops->putcsSince ops->putcs is a NULL pointer, this leads to a kernel panic.To prevent this, we need to call set_blitting_type() within set_con2fb_map()to properly initialize ops->putcs.
 漏洞公开时间：2024-10-22 04:15:17
 漏洞创建时间：2024-10-22 05:03:19
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2024-50048
<details>
<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |
| ------- | -------- | -------- |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/5b97eebcce1b4f3f07a71f635d6aa3af96c236e7 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/8266ae6eafdcd5a3136592445ff4038bbc7ee80e |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/e5c2dba62996a3a6eeb34bd248b90fc69c5a6a1b |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/f7fb5dda555344529ce584ff7a28b109528d2f1b |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-50048 | https://bugzilla.suse.com/show_bug.cgi?id=1232310 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-50048 | https://bugzilla.suse.com/show_bug.cgi?id=1232310 |
| suse_bugzilla | https://git.kernel.org/stable/c/5b97eebcce1b4f3f07a71f635d6aa3af96c236e7 | https://bugzilla.suse.com/show_bug.cgi?id=1232310 |
| suse_bugzilla | https://git.kernel.org/stable/c/8266ae6eafdcd5a3136592445ff4038bbc7ee80e | https://bugzilla.suse.com/show_bug.cgi?id=1232310 |
| suse_bugzilla | https://git.kernel.org/stable/c/e5c2dba62996a3a6eeb34bd248b90fc69c5a6a1b | https://bugzilla.suse.com/show_bug.cgi?id=1232310 |
| suse_bugzilla | https://git.kernel.org/stable/c/f7fb5dda555344529ce584ff7a28b109528d2f1b | https://bugzilla.suse.com/show_bug.cgi?id=1232310 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-50048.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1232310 |
| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2320623 | https://bugzilla.suse.com/show_bug.cgi?id=1232310 |
| debian |  | https://security-tracker.debian.org/tracker/CVE-2024-50048 |
| mageia |  | http://advisories.mageia.org/MGASA-2024-0345.html |

</details>

漏洞分析指导链接：
  https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
 漏洞数据来源:
  openBrain开源漏洞感知系统
 漏洞补丁信息：
  <details>
<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源  |
| ------- | -------- | ------- | -------- | --------- |
|  |  | https://git.kernel.org/stable/c/5b97eebcce1b4f3f07a71f635d6aa3af96c236e7 |  | nvd |
|  |  | https://git.kernel.org/stable/c/8266ae6eafdcd5a3136592445ff4038bbc7ee80e |  | nvd |
|  |  | https://git.kernel.org/stable/c/e5c2dba62996a3a6eeb34bd248b90fc69c5a6a1b |  | nvd |
|  |  | https://git.kernel.org/stable/c/f7fb5dda555344529ce584ff7a28b109528d2f1b |  | nvd |

</details>

二、漏洞分析结构反馈
 影响性分析说明：
  In the Linux kernel, the following vulnerability has been resolved:fbcon: Fix a NULL pointer dereference issue in fbcon_putcssyzbot has found a NULL pointer dereference bug in fbcon.Here is the simplified C reproducer:struct param {uint8_t type;struct tiocl_selection ts;};int main(){struct fb_con2fbmap con2fb;struct param param;int fd = open( /dev/fb1 , 0, 0);con2fb.console = 0x19;con2fb.framebuffer = 0;ioctl(fd, FBIOPUT_CON2FBMAP, &con2fb);param.type = 2;param.ts.xs = 0; param.ts.ys = 0;param.ts.xe = 0; param.ts.ye = 0;param.ts.sel_mode = 0;int fd1 = open( /dev/tty1 , O_RDWR, 0);ioctl(fd1, TIOCLINUX, &param);con2fb.console = 1;con2fb.framebuffer = 0;ioctl(fd, FBIOPUT_CON2FBMAP, &con2fb);return 0;}After calling ioctl(fd1, TIOCLINUX, &param), the subsequent ioctl(fd, FBIOPUT_CON2FBMAP, &con2fb)causes the kernel to follow a different execution path: set_con2fb_map  -> con2fb_init_display   -> fbcon_set_disp    -> redraw_screen     -> hide_cursor      -> clear_selection       -> highlight        -> invert_screen         -> do_update_region          -> fbcon_putcs           -> ops->putcsSince ops->putcs is a NULL pointer, this leads to a kernel panic.To prevent this, we need to call set_blitting_type() within set_con2fb_map()to properly initialize ops->putcs.
 openEuler评分：
  5.5
 Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
 受影响版本排查(受影响/不受影响)：
  1.openEuler-24.03-LTS(6.6.0):受影响
2.openEuler-20.03-LTS-SP4(4.19.90):不受影响
3.openEuler-22.03-LTS-SP1(5.10.0):不受影响
4.openEuler-22.03-LTS-SP3(5.10.0):不受影响
5.openEuler-22.03-LTS-SP4(5.10.0):不受影响
6.master(6.6.0):不受影响
7.openEuler-24.03-LTS-Next(6.6.0):不受影响

修复是否涉及abi变化(是/否)：
  1.openEuler-20.03-LTS-SP4(4.19.90):否
2.openEuler-22.03-LTS-SP1(5.10.0):否
3.openEuler-22.03-LTS-SP3(5.10.0):否
4.master(6.6.0):否
5.openEuler-24.03-LTS(6.6.0):否
6.openEuler-24.03-LTS-Next(6.6.0):否
7.openEuler-22.03-LTS-SP4(5.10.0):否

原因说明：
  1.master(6.6.0):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP1(5.10.0):
4.openEuler-22.03-LTS-SP3(5.10.0):
5.openEuler-22.03-LTS-SP4(5.10.0):
6.openEuler-24.03-LTS(6.6.0):
7.openEuler-24.03-LTS-Next(6.6.0):

@yangyingliang ,@jiaoff ,@guohaocs2c ,@hanjun-guo ,@woqidaideshi ,@newbeats ,@zhangyi089 ,@colyli ,@thundertown ,@htforge ,@chiqijun ,@lengchao ,@zhujianwei001 ,@kylin-mayukun ,@wangxiongfeng ,@wkfxxx ,@SuperSix173 ,@jentlestea ,@oskernel0719 ,@gasonchen 
**issue处理注意事项:** 
**1. 当前issue受影响的分支提交pr时, 须在pr描述中填写当前issue编号进行关联, 否则无法关闭当前issue;**
**2. 模板内容需要填写完整, 无论是受影响或者不受影响都需要填写完整内容,未引入的分支不需要填写, 否则无法关闭当前issue;**
**3. 以下为模板中需要填写完整的内容, 请复制到评论区回复, 注: 内容的标题名称(影响性分析说明, openEuler评分, 受影响版本排查(受影响/不受影响), 修复是否涉及abi变化(是/否))不能省略,省略后cve-manager将无法正常解析填写内容.**
************************************************************************
影响性分析说明:

openEuler评分: (评分和向量)

受影响版本排查(受影响/不受影响): 
1.master(6.6.0):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP1(5.10.0):
4.openEuler-22.03-LTS-SP3(5.10.0):
5.openEuler-22.03-LTS-SP4(5.10.0):
6.openEuler-24.03-LTS(6.6.0):
7.openEuler-24.03-LTS-Next(6.6.0):

修复是否涉及abi变化(是/否)：
1.master(6.6.0):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP1(5.10.0):
4.openEuler-22.03-LTS-SP3(5.10.0):
5.openEuler-22.03-LTS-SP4(5.10.0):
6.openEuler-24.03-LTS(6.6.0):
7.openEuler-24.03-LTS-Next(6.6.0):

-----------------------------------------------------------------------
issue处理具体操作请参考: 
https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
pr关联issue具体操作请参考:
https://gitee.com/help/articles/4142

CVE-2024-50048

影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:

fbcon: Fix a NULL pointer dereference issue in fbcon_putcs

syzbot has found a NULL pointer dereference bug in fbcon.
Here is the simplified C reproducer:

struct param {
	uint8_t type;
	struct tiocl_selection ts;
};

int main()
{
	struct fb_con2fbmap con2fb;
	struct param param;

int fd = open("/dev/fb1", 0, 0);

con2fb.console = 0x19;
	con2fb.framebuffer = 0;
	ioctl(fd, FBIOPUT_CON2FBMAP, &con2fb);

param.type = 2;
	param.ts.xs = 0; param.ts.ys = 0;
	param.ts.xe = 0; param.ts.ye = 0;
	param.ts.sel_mode = 0;

int fd1 = open("/dev/tty1", O_RDWR, 0);
	ioctl(fd1, TIOCLINUX, &param);

con2fb.console = 1;
	con2fb.framebuffer = 0;
	ioctl(fd, FBIOPUT_CON2FBMAP, &con2fb);

return 0;
}

After calling ioctl(fd1, TIOCLINUX, &param), the subsequent ioctl(fd, FBIOPUT_CON2FBMAP, &con2fb)
causes the kernel to follow a different execution path:

set_con2fb_map
  -> con2fb_init_display
   -> fbcon_set_disp
    -> redraw_screen
     -> hide_cursor
      -> clear_selection
       -> highlight
        -> invert_screen
         -> do_update_region
          -> fbcon_putcs
           -> ops->putcs

Since ops->putcs is a NULL pointer, this leads to a kernel panic.
To prevent this, we need to call set_blitting_type() within set_con2fb_map()
to properly initialize ops->putcs.

openEuler评分:(评分和向量)
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

受影响版本排查(受影响/不受影响):
1.openEuler-20.03-LTS-SP4:不受影响
2.openEuler-22.03-LTS-SP1:不受影响
3.openEuler-22.03-LTS-SP3:不受影响
4.openEuler-22.03-LTS-SP4:不受影响
5.master(6.1.0):不受影响
6.openEuler-24.03-LTS:受影响
7.openEuler-24.03-LTS-Next:不受影响

修复是否涉及abi变化(是/否)：
1.openEuler-20.03-LTS-SP4:否
2.openEuler-22.03-LTS-SP1:否
3.openEuler-22.03-LTS-SP3:否
4.master(6.1.0):否
5.openEuler-24.03-LTS:否
6.openEuler-24.03-LTS-Next:否
7.openEuler-22.03-LTS-SP4:否

@ 经过 cve-manager 解析, 已分析的内容如下表所示:
| 状态  | 分析项目 | 内容 |
|:--:|:--:|---------|
|已分析|1.影响性分析说明|In the Linux kernel, the following vulnerability has been resolved:fbcon: Fix a NULL pointer dereference issue in fbcon_putcssyzbot has found a NULL pointer dereference bug in fbcon.Here is the simplified C reproducer:struct param {uint8_t type;struct tiocl_selection ts;};int main(){struct fb_con2fbmap con2fb;struct param param;int fd = open("/dev/fb1", 0, 0);con2fb.console = 0x19;con2fb.framebuffer = 0;ioctl(fd, FBIOPUT_CON2FBMAP, &con2fb);param.type = 2;param.ts.xs = 0; param.ts.ys = 0;param.ts.xe = 0; param.ts.ye = 0;param.ts.sel_mode = 0;int fd1 = open("/dev/tty1", O_RDWR, 0);ioctl(fd1, TIOCLINUX, &param);con2fb.console = 1;con2fb.framebuffer = 0;ioctl(fd, FBIOPUT_CON2FBMAP, &con2fb);return 0;}After calling ioctl(fd1, TIOCLINUX, &param), the subsequent ioctl(fd, FBIOPUT_CON2FBMAP, &con2fb)causes the kernel to follow a different execution path: set_con2fb_map  -> con2fb_init_display   -> fbcon_set_disp    -> redraw_screen     -> hide_cursor      -> clear_selection       -> highlight        -> invert_screen         -> do_update_region          -> fbcon_putcs           -> ops->putcsSince ops->putcs is a NULL pointer, this leads to a kernel panic.To prevent this, we need to call set_blitting_type() within set_con2fb_map()to properly initialize ops->putcs.|
|已分析|2.openEulerScore|5.5|
|已分析|3.openEulerVector|AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H|
|已分析|4.受影响版本排查|openEuler-24.03-LTS:受影响,openEuler-20.03-LTS-SP4:不受影响,openEuler-22.03-LTS-SP1:不受影响,openEuler-22.03-LTS-SP3:不受影响,openEuler-22.03-LTS-SP4:不受影响,master:不受影响,openEuler-24.03-LTS-Next:不受影响|
|已分析|5.是否涉及abi变化|openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS-SP1:否,openEuler-22.03-LTS-SP3:否,master:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-Next:否,openEuler-22.03-LTS-SP4:否|
|已分析|6.原因说明||

**请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.**

src-openEuler/kernel

内容风险标识

评论 (4)

src-openEuler/kernel .gitee-modal { width: 500px !important; }

内容风险标识

CVE-2024-50048

评论 (4)

搜索帮助

src-openEuler/kernel