OSV-2018-140 Heap-buffer-overflow in BEInt<unsigned short, 2>::operator unsigned short
A heap buffer overflow in font parsing allows attackers to cause denial of service or potentially execute code via malicious fonts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is OSV-2018-140?
OSV-2018-140 is a memory corruption vulnerability in harfbuzz, published on 13 Jan 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=11074
Crash type: Heap-buffer-overflow READ 1
Crash state:
BEInt<unsigned short, 2>::operator unsigned short
AAT::LookupFormat10<OT::IntType<unsigned short, 2u> >::sanitize
AAT::Lookup<OT::IntType<unsigned short, 2u> >::sanitize
Which versions are affected by OSV-2018-140?
1 open source package ship an affected version, including harfbuzz.
| Package | Affected | Fixed in |
|---|---|---|
harfbuzz OSS-Fuzz | All versions | None |
How do I fix OSV-2018-140?
No fix has been published for OSV-2018-140 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is OSV-2018-140 being exploited?
There is no known exploitation of OSV-2018-140 in the wild and no public exploit code.