7.8

CVE-2021-47458

ocfs2: mount fails with buffer overflow in strlen

In the Linux kernel, the following vulnerability has been resolved:

ocfs2: mount fails with buffer overflow in strlen

Starting with kernel 5.11 built with CONFIG_FORTIFY_SOURCE mouting an
ocfs2 filesystem with either o2cb or pcmk cluster stack fails with the
trace below.  Problem seems to be that strings for cluster stack and
cluster name are not guaranteed to be null terminated in the disk
representation, while strlcpy assumes that the source string is always
null terminated.  This causes a read outside of the source string
triggering the buffer overflow detection.

  detected buffer overflow in strlen
  ------------[ cut here ]------------
  kernel BUG at lib/string.c:1149!
  invalid opcode: 0000 [#1] SMP PTI
  CPU: 1 PID: 910 Comm: mount.ocfs2 Not tainted 5.14.0-1-amd64 #1
    Debian 5.14.6-2
  RIP: 0010:fortify_panic+0xf/0x11
  ...
  Call Trace:
   ocfs2_initialize_super.isra.0.cold+0xc/0x18 [ocfs2]
   ocfs2_fill_super+0x359/0x19b0 [ocfs2]
   mount_bdev+0x185/0x1b0
   legacy_get_tree+0x27/0x40
   vfs_get_tree+0x25/0xb0
   path_mount+0x454/0xa20
   __x64_sys_mount+0x103/0x140
   do_syscall_64+0x3b/0xc0
   entry_SYSCALL_64_after_hwframe+0x44/0xae
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version < 4.4.290
Linux ≫ Linux Kernel Version >= 4.5 < 4.9.288
Linux ≫ Linux Kernel Version >= 4.10 < 4.14.253
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.214
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.156
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.76
Linux ≫ Linux Kernel Version >= 5.11 < 5.14.15
Linux ≫ Linux Kernel Version5.15 Updaterc1
Linux ≫ Linux Kernel Version5.15 Updaterc2
Linux ≫ Linux Kernel Version5.15 Updaterc3
Linux ≫ Linux Kernel Version5.15 Updaterc4
Linux ≫ Linux Kernel Version5.15 Updaterc5
Linux ≫ Linux Kernel Version5.15 Updaterc6
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.24% 0.144
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

https://git.kernel.org/stable/c/0e677ea5b7396f715a76b6b0ef441430e4c4b57f
Patch
https://git.kernel.org/stable/c/232ed9752510de4436468b653d145565669c8498
Patch
https://git.kernel.org/stable/c/4b74ddcc22ee6455946e80a9c4808801f8f8561e
Patch
https://git.kernel.org/stable/c/7623b1035ca2d17bde0f6a086ad6844a34648df1
Patch
https://git.kernel.org/stable/c/93be0eeea14cf39235e585c8f56df3b3859deaad
Patch
https://git.kernel.org/stable/c/ac011cb3ff7a76b3e0e6e77158ee4ba2f929e1fb
Patch
https://git.kernel.org/stable/c/b15fa9224e6e1239414525d8d556d824701849fc
Patch
https://git.kernel.org/stable/c/d3a83576378b4c904f711598dde2c5e881c4295c
Patch