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[email protected]CVE-2020-1898

HistoryMar 11, 2021 - 1:15 a.m.

CVE-2020-1898

2021-03-1101:15:14

CWE-674

[email protected]

web.nvd.nist.gov

cve-2020-1898

fb_unserialize

deserialization

hhvm

stack exhaustion

security vulnerability

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.003 Low

EPSS

Percentile

70.3%

JSON

The fb_unserialize function did not impose a depth limit for nested deserialization. That meant a maliciously constructed string could cause deserialization to recurse, leading to stack exhaustion. This issue affected HHVM prior to v4.32.3, between versions 4.33.0 and 4.56.0, 4.57.0, 4.58.0, 4.58.1, 4.59.0, 4.60.0, 4.61.0, 4.62.0.

Affected configurations

NVD

Node

facebookhhvmRange<4.32.3

facebookhhvmRange4.33.0–4.56.1

facebookhhvmMatch4.57.0

facebookhhvmMatch4.58.0

facebookhhvmMatch4.58.1

facebookhhvmMatch4.59.0

facebookhhvmMatch4.60.0

facebookhhvmMatch4.61.0

facebookhhvmMatch4.62.0

CPENameOperatorVersion
facebook:hhvmfacebook hhvmlt4.32.3
facebook:hhvmfacebook hhvmlt4.56.1
facebook:hhvmfacebook hhvmeq4.57.0
facebook:hhvmfacebook hhvmeq4.58.0
facebook:hhvmfacebook hhvmeq4.58.1
facebook:hhvmfacebook hhvmeq4.59.0
facebook:hhvmfacebook hhvmeq4.60.0
facebook:hhvmfacebook hhvmeq4.61.0
facebook:hhvmfacebook hhvmeq4.62.0

CPE	Name	Operator	Version
facebook:hhvm	facebook hhvm	lt	4.32.3
facebook:hhvm	facebook hhvm	lt	4.56.1
facebook:hhvm	facebook hhvm	eq	4.57.0
facebook:hhvm	facebook hhvm	eq	4.58.0
facebook:hhvm	facebook hhvm	eq	4.58.1
facebook:hhvm	facebook hhvm	eq	4.59.0
facebook:hhvm	facebook hhvm	eq	4.60.0
facebook:hhvm	facebook hhvm	eq	4.61.0
facebook:hhvm	facebook hhvm	eq	4.62.0

CNA Affected

[
  {
    "product": "HHVM",
    "vendor": "Facebook",
    "versions": [
      {
        "lessThan": "unspecified",
        "status": "unaffected",
        "version": "4.62.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "4.62.0"
      },
      {
        "lessThan": "unspecified",
        "status": "unaffected",
        "version": "4.61.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "4.61.0"
      },
      {
        "lessThan": "unspecified",
        "status": "unaffected",
        "version": "4.60.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "4.60.0"
      },
      {
        "lessThan": "unspecified",
        "status": "unaffected",
        "version": "4.59.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "4.59.0"
      },
      {
        "lessThan": "unspecified",
        "status": "unaffected",
        "version": "4.58.2",
        "versionType": "custom"
      },
      {
        "lessThan": "unspecified",
        "status": "affected",
        "version": "4.58.0",
        "versionType": "custom"
      },
      {
        "lessThan": "unspecified",
        "status": "unaffected",
        "version": "4.57.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "4.57.0"
      },
      {
        "lessThan": "unspecified",
        "status": "unaffected",
        "version": "4.56.1",
        "versionType": "custom"
      },
      {
        "lessThan": "unspecified",
        "status": "affected",
        "version": "4.33.0",
        "versionType": "custom"
      },
      {
        "lessThan": "unspecified",
        "status": "unaffected",
        "version": "4.32.3",
        "versionType": "custom"
      },
      {
        "lessThan": "4.32.3",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]

References

github.com/facebook/hhvm/commit/1746dfb11fc0048366f34669e74318b8278a684c

hhvm.com/blog/2020/06/30/security-update.html

Social References

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.003 Low

EPSS

Percentile

70.3%

JSON

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