CVE-2020-15260

Published Mar 10, 2021

Last updated 2 years ago

CVSS medium 6.8

Overview

Description: PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In version 2.10 and earlier, PJSIP transport can be reused if they have the same IP address + port + protocol. However, this is insufficient for secure transport since it lacks remote hostname authentication. Suppose we have created a TLS connection to `sip.foo.com`, which has an IP address `100.1.1.1`. If we want to create a TLS connection to another hostname, say `sip.bar.com`, which has the same IP address, then it will reuse that existing connection, even though `100.1.1.1` does not have certificate to authenticate as `sip.bar.com`. The vulnerability allows for an insecure interaction without user awareness. It affects users who need access to connections to different destinations that translate to the same address, and allows man-in-the-middle attack if attacker can route a connection to another destination such as in the case of DNS spoofing.
Source: security-advisories@github.com
NVD status: Analyzed

Risk scores

CVSS 3.1

Type: Primary
Base score: 6.8
Impact score: 4
Exploitability score: 2.2
Vector string: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N
Severity: MEDIUM

CVSS 2.0

Type: Primary
Base score: 4.3
Impact score: 2.9
Exploitability score: 8.6
Vector string: AV:N/AC:M/Au:N/C:N/I:P/A:N

Weaknesses

nvd@nist.gov: CWE-295
security-advisories@github.com: CWE-297

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "negate": false,
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:teluu:pjsip:*:*:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "107D71AA-CD87-4682-B600-D583CB865E6F",
            "versionEndIncluding": "2.10"
          }
        ],
        "operator": "OR"
      }
    ]
  }
]

Overview

Risk scores

CVSS 3.1

CVSS 2.0

Weaknesses

Social media

Configurations

References