CVE-2021-22555

Description

A heap out-of-bounds write affecting Linux since v2.6.19-rc1 was discovered in net/netfilter/x_tables.c. This allows an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name space

CVSS breakdown

Affected products

• Broadcom / fabric_operating_system
• Linux / Linux kernel2.6.19 – 4.4.267
• NetApp / aff_500f_firmware
• NetApp / aff_a250_firmware
• NetApp / aff_a400_firmware
• NetApp / c250_firmware
• NetApp / c400_firmware
• NetApp / cloud_backup
• NetApp / fas_8300_firmware
• NetApp / fas_8700_firmware
• NetApp / h300s_firmware
• NetApp / h410c_firmware
• NetApp / h410s_firmware
• NetApp / h500s_firmware
• NetApp / h610c_firmware
• NetApp / h610s_firmware
• NetApp / h615c_firmware
• NetApp / h700s_firmware
• NetApp / hci_management_node
• NetApp / solidfire
• NetApp / solidfire_baseboard_management_controller

Exploits & proofs of concept

• exploit-dbLinux Kernel 2.6.19 < 5.9 - 'Netfilter Local Privilege Escalationby TheFloW

References

• VENDOR_ADVISORYhttps://github.com/google/security-research/security/advisories/GHSA-xxx5-8mvq-3528
• MISChttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=9fa492cdc160cd27ce1046cb36f47d3b2b1efa21
• MISChttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=b29c457a6511435960115c0f548c4360d5f4801d
• EXPLOIThttp://packetstormsecurity.com/files/163528/Linux-Kernel-Netfilter-Heap-Out-Of-Bounds-Write.html
• MISChttps://security.netapp.com/advisory/ntap-20210805-0010/
• EXPLOIThttp://packetstormsecurity.com/files/163878/Kernel-Live-Patch-Security-Notice-LSN-0080-1.html
• EXPLOIThttp://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html
• EXPLOIThttp://packetstormsecurity.com/files/164437/Netfilter-x_tables-Heap-Out-Of-Bounds-Write-Privilege-Escalation.html
• EXPLOIThttp://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html