OSV-2023-1303 Heap-use-after-free in htmlCurrentChar
A heap-use-after-free vulnerability in the HTML parser allows attackers to cause crashes or potentially execute code via malicious 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-2023-1303?
OSV-2023-1303 is an use after free vulnerability in libxml2, published on 15 Dec 2023. 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=65043
Crash type: Heap-use-after-free READ 1
Crash state:
htmlCurrentChar
htmlParseComment
htmlParseDocument
Which versions are affected by OSV-2023-1303?
1 open source package ship an affected version, including libxml2.
| Package | Affected | Fixed in |
|---|---|---|
libxml2 OSS-Fuzz | All versions | None |
How do I fix OSV-2023-1303?
No fix has been published for OSV-2023-1303 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is OSV-2023-1303 being exploited?
There is no known exploitation of OSV-2023-1303 in the wild and no public exploit code.