CVE-2023-28320
A denial of service vulnerability exists in curl <v8.1.0 in the way libcurl provides several different backends for resolving host names, selected at build time. If it is built to use the synchronous
02 Description
A denial of service vulnerability exists in curl <v8.1.0 in the way libcurl provides several different backends for resolving host names, selected at build time. If it is built to use the synchronous
03 Exploitation and scoring
- Exploitation
- Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.
- SSVC decision
- ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 2.65% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 85.3% of scored records. A rank, not a probability.
- NVD base score
- 5.9 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-10-23.
- Red Hat severity
- Low. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2023-05-26 00:00Z3 YR AGO
- Last updated
- 2025-01-15 15:59Z1 YR AGO
- Reserved
- 2023-03-14
- Assigning CNA
- hackerone
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 5.9)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- Data version
- 5.1
- Document digest
- 2beb2946ae4e6bf2b7d28cccec044d0db3e21231c5a68ce60d017d8f14225305
05 Affected products
06 References
- hackerone.comhttps://hackerone.com/reports/1929597
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20230609-0009/
- support.apple.comhttps://support.apple.com/kb/HT213843
- support.apple.comhttps://support.apple.com/kb/HT213844
- support.apple.comhttps://support.apple.com/kb/HT213845
- seclists.org20230725 APPLE-SA-2023-07-24-6 macOS Big Sur 11.7.9http://seclists.org/fulldisclosure/2023/Jul/52
- seclists.org20230725 APPLE-SA-2023-07-24-5 macOS Monterey 12.6.8http://seclists.org/fulldisclosure/2023/Jul/48
- seclists.org20230725 APPLE-SA-2023-07-24-4 macOS Ventura 13.5http://seclists.org/fulldisclosure/2023/Jul/47
- security.gentoo.orgGLSA-202310-12https://security.gentoo.org/glsa/202310-12
07 Fixed in
Debian 12
- curl Fixed in 7.88.1-10
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- curl Fixed in 7.88.1-10
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- curl Fixed in 7.88.1-10
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.