CVE-2020-1917
First published: Wed Mar 10 2021(Updated: )
xbuf_format_converter, used as part of exif_read_data, was appending a terminating null character to the generated string, but was not using its standard append char function. As a result, if the buffer was full, it would result in an out-of-bounds write. This issue affects HHVM versions prior to 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.81.0 and 4.93.1, and versions 4.94.0, 4.95.0, 4.96.0, 4.97.0, 4.98.0.
Credit: cve-assign@fb.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Facebook HHVM | <4.56.3 | |
| Facebook HHVM | >=4.57.0<4.80.2 | |
| Facebook HHVM | >=4.81.0<4.93.2 | |
| Facebook HHVM | =4.94.0 | |
| Facebook HHVM | =4.95.0 | |
| Facebook HHVM | =4.96.0 | |
| Facebook HHVM | =4.97.0 | |
| Facebook HHVM | =4.98.0 |
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Reference Links
Frequently Asked Questions
What is CVE-2020-1917?
CVE-2020-1917 is a vulnerability that affects HHVM versions prior to 4.56.3, allowing an attacker to perform an out-of-bounds write.
How severe is CVE-2020-1917?
CVE-2020-1917 has a severity rating of 9.8 (critical).
How does CVE-2020-1917 affect Facebook HHVM?
CVE-2020-1917 affects Facebook HHVM versions prior to 4.56.3.
What is the fix for CVE-2020-1917?
To fix CVE-2020-1917, update HHVM to version 4.56.3 or newer.
Where can I find more information about CVE-2020-1917?
More information about CVE-2020-1917 can be found at the following references: [Reference 1](https://github.com/facebook/hhvm/commit/08193b7f0cd3910256e00d599f0f3eb2519c44ca), [Reference 2](https://hhvm.com/blog/2021/02/25/security-update.html)
- collector/nvd-index
- agent/weakness
- agent/description
- agent/type
- vendor/facebook
- canonical/facebook hhvm
- version/facebook hhvm/4.57.0
- version/facebook hhvm/4.81.0
- version/facebook hhvm/4.94.0
- version/facebook hhvm/4.95.0
- version/facebook hhvm/4.96.0
- version/facebook hhvm/4.97.0
- version/facebook hhvm/4.98.0