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Ubuntu 18.04 PJSIP Critical Denial Of Service Vuln USN-8122-1

ubuntu
Calendar Grey March 24, 2026
Dist Ubuntu Esm H88
Multiple security issues in PJSIP on Ubuntu could lead to denial of service or remote code execution.
Several security issues were fixed in PJSIP.

Summary

Several security issues were fixed in PJSIP.

Software Description:

- pjproject: multimedia communication library

Details:

Youngsung Kim discovered that PJSIP did not properly parse numeric header

fields in SIP messages. A remote attacker could use this issue to cause

PJSIP to crash, resulting in a denial of service, or possibly execute

arbitrary code. This issue only affected Ubuntu 16.04 LTS. (CVE-2017-16872)

Peter Koletzki discovered that PJSIP did not properly handle certain

connection requests. A remote attacker could possibly use this issue to

cause PJSIP to enter an unrecoverable state and reject further connections,

resulting in a denial of service. This issue only affected Ubuntu 16.04

LTS. (CVE-2017-16875)

Alfred Farrugia, Sandro Gauci, and Kevin Harwell discovered that PJSIP did

not properly parse certain SDP messages. A remote attacker could possibly

use this issue to cause PJSIP to crash, resulting in a denial of service.

This issue only affected Ubuntu 16.04 LTS. ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical remote code execution Ubuntu PJSIP

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.04 LTS
  libpj2                          2.7.2~dfsg-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libpjmedia2                     2.7.2~dfsg-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libpjnath2                      2.7.2~dfsg-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libpjsip2                       2.7.2~dfsg-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libpjsua2                       2.7.2~dfsg-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  python-pjproject                2.7.2~dfsg-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  libpj2                          2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libpjmedia2                     2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libpjnath2                      2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libpjsip2                       2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libpjsua2                       2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1
                                  Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-8122-1

CVE-2017-16872, CVE-2017-16875, CVE-2018-1000098, CVE-2018-1000099,

CVE-2020-15260, CVE-2021-21375, CVE-2021-32686, CVE-2021-37706,

CVE-2021-43299, CVE-2021-43300, CVE-2021-43301, CVE-2021-43302,

CVE-2021-43303, CVE-2026-25994

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8122-1

Topics%20covered

Topics Covered

security advisory denial of service critical remote code execution Ubuntu PJSIP

Package Information

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