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CVE-2023-28099

23
FAUCET Score

CVE-2023-28099 is a denial-of-service vulnerability affecting OpenSIPS versions prior to 3.1.9 and 3.2.6. An invalid IP address string provided to the ds_is_in_list() function can cause the server to crash by attempting to print from an invalid memory address. This vulnerability has a CVSS score of 7.5 (High), indicating it can be exploited remotely with low attack complexity, leading to a complete loss of availability. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.1.9CPE matchmatch criteria
cpe:2.3:a:opensips:opensips:*:*:*:*:*:*:*:*
>= 3.2.0, < 3.2.6CPE matchmatch criteria
cpe:2.3:a:opensips:opensips:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.91%
Probability of exploitation in next 30 days
EPSS Percentile
56.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0091 is in the 31st percentile among its peer group of 51,485 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

No media coverage found for this CVE.

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 (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / OpenSIPS/opensips/commit/e2f13d374
PatchThird Party Advisory
github.com / OpenSIPS/opensips/issues/2780
Third Party Advisory
github.com / OpenSIPS/opensips/security/advisories/GHSA-pfm5-6vhv-3ff3
Third Party Advisory