Vulnerability Name:

CVE-2021-39534 (CCN-209858)

Assigned:2020-08-02
Published:2020-08-02
Updated:2021-10-02
Summary:An issue was discovered in libslax through v0.22.1. slaxIsCommentStart() in slaxlexer.c has a heap-based buffer overflow.
CVSS v3 Severity:8.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
8.0 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
7.8 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
7.1 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:6.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
6.8 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-787
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2021-39534

Source: CCN
Type: libslax Web site
libslax

Source: XF
Type: UNKNOWN
libslax-cve202139534-bo(209858)

Source: CCN
Type: libslax GIT Repository
A heap-buffer-overflow in slaxlexer.c:751:13 #52

Source: MISC
Type: Exploit, Issue Tracking, Third Party Advisory
https://github.com/Juniper/libslax/issues/52

Vulnerable Configuration:Configuration 1:
  • cpe:/a:juniper:libslax:*:*:*:*:*:*:*:* (Version <= 0.22.1)

    • Configuration CCN 1:
  • cpe:/a:juniper:libslax:0.22.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    juniper libslax *
    juniper libslax 0.22.0