pjproject: Loop with Unreachable Exit Condition
CVE-2022-24763 is a high-severity loop with unreachable exit condition vulnerability in pjproject from Pjsip, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected pjproject versions: <= 2.12. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 2.06% chance of exploitation within 30 days, higher than 82% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Pjsip to 2.13 or a later version.
- Read the advisory on github.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Pjsip | pjproject | <= 2.12 | Not stated |
| Teluu | Pjsip | 2.5 up to, but not including, 2.13 | 2.13 |
| Debian | Debian Linux | 9.0; 10.0; 11.0 | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.5 | High | CNA (github.com) |
| CVSS 3.1 | 7.5 | High | NVD |
| CVSS 2.0 | 5.0 | Medium | NVD |
Official description
PJSIP is a free and open source multimedia communication library written in the C language. Versions 2.12 and prior contain a denial-of-service vulnerability that affects PJSIP users that consume PJSIP's XML parsing in their apps. Users are advised to update. There are no known workarounds.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Loop with Unreachable Exit Condition
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.
More Loop with Unreachable Exit Condition vulnerabilities (CWE-835)
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Advisories
- github.com/pjsip/pjproject/security/advisories/GHSA-5x45-qp78-g4p4Third Party Advisory
Patches and release notes
- github.com/pjsip/pjproject/commit/856f87c2e97a27b256482dbe0d748b1194355a21Third Party Advisory
Third-party and government advisories
- lists.debian.org/debian-lts-announce/2022/05/msg00047.htmlMailing List, Third Party Advisory
- lists.debian.org/debian-lts-announce/2022/11/msg00021.htmlMailing List, Third Party Advisory
- lists.debian.org/debian-lts-announce/2023/08/msg00038.htmlMailing List, Third Party Advisory
- security.gentoo.org/glsa/202210-37Third Party Advisory
- debian.org/security/2022/dsa-5285Third Party Advisory
Other references
Other vulnerabilities in pjproject
- 7.4 High severity
- 7.1 High severity
- 9.1 Critical severity
- 9.1 Critical severity
- 8.2 High severity
- 7.5 High severity
Recent Loop with Unreachable Exit Condition vulnerabilities
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
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