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Remote attackers can cause a denial of service with a crafted UDP message

High
andywolk published GHSA-h94r-c3pv-4564 Feb 23, 2023

Package

sofia-sip (C)

Affected versions

1.13.13

Patched versions

1.13.14

Description

Remote attackers to cause a denial of service (daemon crash) via a crafted UDP message that leads to a failure of the libsofia-sip-ua/tport/tport.c self assertion.

Update to sofia-sip >= 1.13.14 to remove the vulnerability.

The issue was initially reported to another project drachtio/drachtio-server#244
and fixed in the fork davehorton/sofia-sip@13b2a13

tport_t *tport_tsend(tport_t *self,
                     msg_t *msg,
                     tp_name_t const *_tpn,
                     tag_type_t tag, tag_value_t value, ...)
{
[...]

  assert(self); // should not assert here when there's    if (!self) right below
handling that gracefully

  if (!self || !msg || !_tpn) {
    msg_set_errno(msg, EINVAL);
    return NULL;
  }
[...]
}

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVE ID

CVE-2022-47516

Weaknesses

Reachable Assertion

The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary. Learn more on MITRE.