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cve[email protected]CVE-2020-1917
HistoryMar 10, 2021 - 4:15 p.m.

CVE-2020-1917

2021-03-1016:15:14
CWE-787
CWE-122
[email protected]
web.nvd.nist.gov
21
3
security
vulnerability
cve-2020-1917
xbuf_format_converter
exif_read_data
out-of-bounds write
hhvm
buffer overflow

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

AI Score

9.4

Confidence

High

EPSS

0.002

Percentile

64.7%

JSON

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.

Affected configurations

NVD
Node
facebookhhvmRange<4.56.3
OR
facebookhhvmRange4.57.0–4.80.2
OR
facebookhhvmRange4.81.0–4.93.2
OR
facebookhhvmMatch4.94.0
OR
facebookhhvmMatch4.95.0
OR
facebookhhvmMatch4.96.0
OR
facebookhhvmMatch4.97.0
OR
facebookhhvmMatch4.98.0
VendorProductVersionCPE
facebookhhvm4.94.0cpe:/a:facebook:hhvm:4.94.0:::
facebookhhvm4.98.0cpe:/a:facebook:hhvm:4.98.0:::
facebookhhvm4.97.0cpe:/a:facebook:hhvm:4.97.0:::
facebookhhvm4.95.0cpe:/a:facebook:hhvm:4.95.0:::
facebookhhvm4.96.0cpe:/a:facebook:hhvm:4.96.0:::

CNA Affected

[
  {
    "product": "HHVM",
    "vendor": "Facebook",
    "versions": [
      {
        "lessThan": "unspecified",
        "status": "unaffected",
        "version": "4.98.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "4.98.0"
      },
      {
        "lessThan": "unspecified",
        "status": "unaffected",
        "version": "4.97.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "4.97.0"
      },
      {
        "lessThan": "unspecified",
        "status": "unaffected",
        "version": "4.96.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "4.96.0"
      },
      {
        "lessThan": "unspecified",
        "status": "unaffected",
        "version": "4.95.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "4.95.0"
      },
      {
        "lessThan": "unspecified",
        "status": "unaffected",
        "version": "4.94.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "4.94.0"
      },
      {
        "lessThan": "unspecified",
        "status": "unaffected",
        "version": "4.93.2",
        "versionType": "custom"
      },
      {
        "lessThan": "unspecified",
        "status": "affected",
        "version": "4.81.0",
        "versionType": "custom"
      },
      {
        "lessThan": "unspecified",
        "status": "unaffected",
        "version": "4.80.2",
        "versionType": "custom"
      },
      {
        "lessThan": "unspecified",
        "status": "affected",
        "version": "4.57.0",
        "versionType": "custom"
      },
      {
        "lessThan": "unspecified",
        "status": "unaffected",
        "version": "4.56.3",
        "versionType": "custom"
      },
      {
        "lessThan": "4.56.3",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]

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CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

AI Score

9.4

Confidence

High

EPSS

0.002

Percentile

64.7%

JSON
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