OSV-2021-921 Stack-buffer-overflow in bool re2::DFA::InlinedSearchLoop<true, true, true>
A stack buffer overflow in the RE2 regex library allows attackers to cause a denial of service via crafted input.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2021-921?
OSV-2021-921 is a memory corruption vulnerability in re2, published on 6 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35821
Crash type: Stack-buffer-overflow READ 1
Crash state:
bool re2::DFA::InlinedSearchLoop<true, true, true>
re2::DFA::Search
re2::Prog::SearchDFA
Which versions are affected by OSV-2021-921?
1 open source package ship an affected version, including re2.
| Package | Affected | Fixed in |
|---|---|---|
re2 OSS-Fuzz | All versions | None |
How do I fix OSV-2021-921?
No fix has been published for OSV-2021-921 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-2021-921 being exploited?
There is no known exploitation of OSV-2021-921 in the wild and no public exploit code.