Description
In radare2 through 4.0, there is an integer overflow for the variable new_token_size in the function r_asm_massemble at libr/asm/asm.c. This integer overflow will result in a Use-After-Free for the buffer tokens, which can be filled with arbitrary malicious data after the free. This allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via crafted input.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | radare2 | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | radare2 | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | radare2 | 4.0.0-r0 | — |
| Alpine v3.23 | radare2 | 4.0.0-r0 | — |
| Alpine v3.22 | radare2 | 4.0.0-r0 | — |
| Alpine v3.21 | radare2 | 4.0.0-r0 | — |
| Alpine v3.20 | radare2 | 4.0.0-r0 | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | radare2 | 4.0.0-r0 | — |
| Alpine v3.18 | radare2 | 4.0.0-r0 | — |
References
- https://github.com/radareorg/radare2/issues/15543
- FEDORA-2020-4a3ff78ba5 vendor-advisory
- FEDORA-2020-acd8cdb08d vendor-advisory