Overview
- Description
- 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.
- Source
- cve-assign@fb.com
- NVD status
- Analyzed
Risk scores
CVSS 3.1
- Type
- Primary
- Base score
- 9.8
- Impact score
- 5.9
- Exploitability score
- 3.9
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Severity
- CRITICAL
CVSS 2.0
- Type
- Primary
- Base score
- 7.5
- Impact score
- 6.4
- Exploitability score
- 10
- Vector string
- AV:N/AC:L/Au:N/C:P/I:P/A:P
Social media
- Hype score
- Not currently trending
Configurations
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "069C0B7D-5233-4EFF-BBA7-8B84D9227044",
"versionEndExcluding": "4.56.3"
},
{
"criteria": "cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "59DAD37C-9F51-4BE3-B045-537CA259F7F7",
"versionEndExcluding": "4.80.2",
"versionStartIncluding": "4.57.0"
},
{
"criteria": "cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "3B78720F-AA79-459F-A66C-5C4D67D7EE31",
"versionEndExcluding": "4.93.2",
"versionStartIncluding": "4.81.0"
},
{
"criteria": "cpe:2.3:a:facebook:hhvm:4.94.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1C4B9A3C-6A5A-45C4-A490-C13CF6D6A867"
},
{
"criteria": "cpe:2.3:a:facebook:hhvm:4.95.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "18D33DC0-E6A7-4DC6-8E9A-2B85842EC21B"
},
{
"criteria": "cpe:2.3:a:facebook:hhvm:4.96.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B0B9078D-3C25-45B2-B5F2-59585A47BACB"
},
{
"criteria": "cpe:2.3:a:facebook:hhvm:4.97.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7B8F5C11-8610-4099-8A45-E6241F3D24E0"
},
{
"criteria": "cpe:2.3:a:facebook:hhvm:4.98.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "47FF13C3-19DC-4F53-BF9D-38AC89D647D5"
}
],
"operator": "OR"
}
]
}
]