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CVE PROGRAM SOURCE RECORD7.1 High

CVE-2021-47458

ocfs2: mount fails with buffer overflow in strlen

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • c74a3bdd9b529d924d1abf986079b783dd105ace to < ac011cb3ff7a76b3e0e6e77158ee4ba2f929e1fbaffected
  • c74a3bdd9b529d924d1abf986079b783dd105ace to < 4b74ddcc22ee6455946e80a9c4808801f8f8561eaffected
  • c74a3bdd9b529d924d1abf986079b783dd105ace to < 232ed9752510de4436468b653d145565669c8498affected
  • c74a3bdd9b529d924d1abf986079b783dd105ace to < 7623b1035ca2d17bde0f6a086ad6844a34648df1affected
  • c74a3bdd9b529d924d1abf986079b783dd105ace to < d3a83576378b4c904f711598dde2c5e881c4295caffected
  • c74a3bdd9b529d924d1abf986079b783dd105ace to < 93be0eeea14cf39235e585c8f56df3b3859deaadaffected
  • c74a3bdd9b529d924d1abf986079b783dd105ace to < 0e677ea5b7396f715a76b6b0ef441430e4c4b57faffected
  • c74a3bdd9b529d924d1abf986079b783dd105ace to < b15fa9224e6e1239414525d8d556d824701849fcaffected

Linux Linux

Default version status: affected

  • 3.14affected
  • 0 to < 3.14unaffected
  • 4.4.290 to ≤ 4.4.*unaffected
  • 4.9.288 to ≤ 4.9.*unaffected
  • 4.14.253 to ≤ 4.14.*unaffected
  • 4.19.214 to ≤ 4.19.*unaffected
  • 5.4.156 to ≤ 5.4.*unaffected
  • 5.10.76 to ≤ 5.10.*unaffected
  • 5.14.15 to ≤ 5.14.*unaffected
  • 5.15 to ≤ *unaffected

References