CVE-2018-12886
stack_protect_prologue in cfgexpand.c and stack_protect_epilogue in function.c in GNU Compiler Collection (GCC) 4.1 through 8 (under certain circumstances) generate instruction sequences when targeting ARM targets that spill the address of the stack…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.17%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
stack_protect_prologue in cfgexpand.c and stack_protect_epilogue in function.c in GNU Compiler Collection (GCC) 4.1 through 8 (under certain circumstances) generate instruction sequences when targeting ARM targets that spill the address of the stack protector guard, which allows an attacker to bypass the protection of -fstack-protector, -fstack-protector-all, -fstack-protector-strong, and -fstack-protector-explicit against stack overflow by controlling what the stack canary is compared against.
- CVSS 3.0
- 8.1 HIGHCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.17% probability · 81th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-209
- Affected
- gnu/gcc
- Source
- cve@mitre.org
References
- https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/config/arm/arm-protos.h?revision=266379&view=markupVendor Advisory
- https://www.gnu.org/software/gcc/gcc-8/changes.htmlExploit, Vendor Advisory
- https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/config/arm/arm-protos.h?revision=266379&view=markupVendor Advisory
- https://www.gnu.org/software/gcc/gcc-8/changes.htmlExploit, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.