# CVE-2020-15260: libpj2: PJSIP is a free and open source multimedia communication library written in C language implementing standard based pr...

CVE-2020-15260 is fixed in 13 products on 1 platform, first by libpj2 2.7.2~dfsg-1ubuntu0.1~esm1, released February 11, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-15260
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0099
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 10, 2021

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libpj2 Ubuntu 18.04.6 LTS (bionic) | 2.7.2~dfsg-1ubuntu0.1~esm1 | [libpj2 2.7.2~dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpj2-2.7.2-dfsg-1ubuntu0.1-esm1.md) | Feb 11, 2026 |
| Linux | libpjlib-util2 Ubuntu 18.04.6 LTS (bionic) | 2.7.2~dfsg-1ubuntu0.1~esm1 | [libpjlib-util2 2.7.2~dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpjlib-util2-2.7.2-dfsg-1ubuntu0.1-esm1.md) | Feb 11, 2026 |
| Linux | libpjmedia-audiodev2 Ubuntu 18.04.6 LTS (bionic) | 2.7.2~dfsg-1ubuntu0.1~esm1 | [libpjmedia-audiodev2 2.7.2~dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpjmedia-audiodev2-2.7.2-dfsg-1ubuntu0.1-esm1.md) | Feb 11, 2026 |
| Linux | libpjmedia-codec2 Ubuntu 18.04.6 LTS (bionic) | 2.7.2~dfsg-1ubuntu0.1~esm1 | [libpjmedia-codec2 2.7.2~dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpjmedia-codec2-2.7.2-dfsg-1ubuntu0.1-esm1.md) | Feb 11, 2026 |
| Linux | libpjmedia-videodev2 Ubuntu 18.04.6 LTS (bionic) | 2.7.2~dfsg-1ubuntu0.1~esm1 | [libpjmedia-videodev2 2.7.2~dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpjmedia-videodev2-2.7.2-dfsg-1ubuntu0.1-esm1.md) | Feb 11, 2026 |
| Linux | libpjmedia2 Ubuntu 18.04.6 LTS (bionic) | 2.7.2~dfsg-1ubuntu0.1~esm1 | [libpjmedia2 2.7.2~dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpjmedia2-2.7.2-dfsg-1ubuntu0.1-esm1.md) | Feb 11, 2026 |
| Linux | libpjnath2 Ubuntu 18.04.6 LTS (bionic) | 2.7.2~dfsg-1ubuntu0.1~esm1 | [libpjnath2 2.7.2~dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpjnath2-2.7.2-dfsg-1ubuntu0.1-esm1.md) | Feb 11, 2026 |
| Linux | libpjsip-simple2 Ubuntu 18.04.6 LTS (bionic) | 2.7.2~dfsg-1ubuntu0.1~esm1 | [libpjsip-simple2 2.7.2~dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpjsip-simple2-2.7.2-dfsg-1ubuntu0.1-esm1.md) | Feb 11, 2026 |
| Linux | libpjsip-ua2 Ubuntu 18.04.6 LTS (bionic) | 2.7.2~dfsg-1ubuntu0.1~esm1 | [libpjsip-ua2 2.7.2~dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpjsip-ua2-2.7.2-dfsg-1ubuntu0.1-esm1.md) | Feb 11, 2026 |
| Linux | libpjsip2 Ubuntu 18.04.6 LTS (bionic) | 2.7.2~dfsg-1ubuntu0.1~esm1 | [libpjsip2 2.7.2~dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpjsip2-2.7.2-dfsg-1ubuntu0.1-esm1.md) | Feb 11, 2026 |
| Linux | libpjsua2 Ubuntu 18.04.6 LTS (bionic) | 2.7.2~dfsg-1ubuntu0.1~esm1 | [libpjsua2 2.7.2~dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpjsua2-2.7.2-dfsg-1ubuntu0.1-esm1.md) | Feb 11, 2026 |
| Linux | libpjsua2-2v5 Ubuntu 18.04.6 LTS (bionic) | 2.7.2~dfsg-1ubuntu0.1~esm1 | [libpjsua2-2v5 2.7.2~dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpjsua2-2v5-2.7.2-dfsg-1ubuntu0.1-esm1.md) | Feb 11, 2026 |
| Linux | python-pjproject Ubuntu 18.04.6 LTS (bionic) | 2.7.2~dfsg-1ubuntu0.1~esm1 | [python-pjproject 2.7.2~dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-pjproject-2.7.2-dfsg-1ubuntu0.1-esm1.md) | Feb 11, 2026 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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