Security readout for executives and security teams
Plain-English summary
CVE-2021-27624 is a denial-of-service flaw in SAP Internet Graphics Service. An unauthenticated network attacker can crash the service after obtaining an existing system state value. The sources state that attackers cannot view or modify data, but service availability can be lost.
Executive priority
Handle as a moderate availability risk. It does not expose or alter data according to the sources, but an outage of SAP graphics services could disrupt dependent business workflows, especially where IGS is externally reachable.
Technical view
The flaw is insufficient input validation in CiXMLIStreamRawBuffer::readRaw(), leading to internal memory corruption and a crash. The CVSS 3.0 vector is AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H, reflecting remote unauthenticated reachability, high attack complexity, and availability-only impact.
Likely exposure
Exposure is most relevant where SAP Internet Graphics Service versions 7.20, 7.20EXT, 7.53, 7.20_EX2, or 7.81 are reachable from untrusted networks. Risk is lower where IGS is not deployed, not reachable, or tightly segmented.
Exploitation context
The source bundle does not show KEV listing or confirmed active exploitation. The attack is unauthenticated but high complexity because it requires retrieving an existing system state value before sending a malicious IGS request.
Researcher notes
Evidence supports a network-triggered crash via insufficient input validation and memory corruption. Do not assume data compromise. The available bundle names the affected product and SAP note, but does not provide detailed patch contents or independent exploitation evidence.
Mitigation direction
- Review SAP Security Note 3021050 for official correction or mitigation guidance.
- Inventory SAP Internet Graphics Service deployments and versions.
- Restrict IGS network access to trusted systems and administrative networks.
- Monitor IGS and SAP service health for unexplained crashes.
- Prioritize remediation for internet-facing or partner-accessible IGS instances.
Validation and detection
- Confirm whether SAP Internet Graphics Service is installed and enabled.
- Verify deployed IGS versions against the affected versions in the advisory.
- Check whether IGS endpoints are reachable from untrusted networks.
- Review SAP logs for recurring crashes or memory corruption errors.
- Confirm SAP Note 3021050 guidance has been evaluated or applied.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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Open ATT&CK lookupCVE-2021-27624 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.9 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H2.23.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.9MediumVector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=578125999CVE reference
- https://launchpad.support.sap.com/#/notes/3021050CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.