Vulnerability Name:

CVE-2020-36323 (CCN-200156)

Assigned:2020-12-23
Published:2020-12-23
Updated:2021-04-27
Summary:In the standard library in Rust before 1.52.0, there is an optimization for joining strings that can cause uninitialized bytes to be exposed (or the program to crash) if the borrowed string changes after its length is checked.
CVSS v3 Severity:8.2 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H)
7.1 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): None
Availibility (A): High
8.2 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H)
7.1 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): None
Availibility (A): High
8.2 High (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H)
7.1 High (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:6.4 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): Partial
8.5 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-134
CWE-20
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2020-36323

Source: XF
Type: UNKNOWN
rust-cve202036323-dos(200156)

Source: CCN
Type: Rust GIT Repository
API soundness issue in join() implementation of [Borrow] #80335

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/rust-lang/rust/issues/80335

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/rust-lang/rust/pull/81728

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/rust-lang/rust/pull/81728#issuecomment-821549174

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/rust-lang/rust/pull/81728#issuecomment-824904190

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-d0ba1901ca

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-d7f74f0250

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-b1ba54add6

Vulnerable Configuration:Configuration 1:
  • cpe:/a:rust-lang:rust:*:*:*:*:*:*:*:* (Version < 1.52.0)

    • Configuration 2:
  • cpe:/o:fedoraproject:fedora:32:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:33:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:34:*:*:*:*:*:*:*

    • Configuration RedHat 1:
  • cpe:/a:redhat:enterprise_linux:8:*:*:*:*:*:*:*

    • Configuration RedHat 2:
  • cpe:/a:redhat:enterprise_linux:8::appstream:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.redhat.rhsa:def:20213063
    P
    		RHSA-2021:3063: rust-toolset:rhel8 security, bug fix, and enhancement update (Moderate)
    2021-08-10
    BACK
    rust-lang rust *
    fedoraproject fedora 32
    fedoraproject fedora 33
    fedoraproject fedora 34