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CVE-2018-1000099

25
FAUCET Score

CVE-2018-1000099 describes an Access of Null/Uninitialized Pointer vulnerability in Teluu PJSIP version 2.7.1 and earlier, impacting products like Debian Linux and PJSIP. This flaw allows an unauthenticated attacker to cause a denial of service (crash) by sending a specially crafted message over the network. With a CVSS v3 score of 7.5 (High), it presents a significant availability risk due to its low attack complexity and lack of user interaction required. While no active exploitation, public exploit code, or significant community discussion has been observed, the vulnerability was addressed in PJSIP version 2.7.2.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.7.1CPE matchmatch criteria
cpe:2.3:a:teluu:pjsip:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.49%
Probability of exploitation in next 30 days
EPSS Percentile
87.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0349 is in the 78th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

ubuntupatch availablevia ubuntu_usn
Product: pjproject (bionic)Fixed in: 2.7.2~dfsg-1ubuntu0.1~esm1
ubuntupatch availablevia ubuntu_usn
Product: pjproject (xenial)Fixed in: 2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1

Vendor Advisories (1)

ubuntuUSN-8122-1

PJSIP vulnerabilities

Mar 24, 2026

References

trac.pjsip.org / repos/milestone/release-2.7.2
Vendor Advisory
trac.pjsip.org / repos/ticket/2092
Vendor Advisory
trac.pjsip.org / repos/ticket/2094
PatchVendor Advisory
debian.org / security/2018/dsa-4170
Third Party Advisory