CVE-2018-14633
A security flaw was found in the chap_server_compute_md5() function in the ISCSI target code in the Linux kernel in a way an…
- 7.0HighCVSS base score
- 8.7%Exploitation in 30 daysEPSS · top 4.8% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
A security flaw was found in the chap_server_compute_md5() function in the ISCSI target code in the Linux kernel in a way an authentication request from an ISCSI initiator is processed. An unauthenticated remote attacker can cause a stack buffer overflow and smash up to 17 bytes of the stack. The attack requires the iSCSI target to be enabled on the victim host. Depending on how the target's code was built (i.e. depending on a compiler, compile flags and hardware architecture) an attack may lead to a system crash and thus to a denial-of-service or possibly to a non-authorized access to data exported by an iSCSI target. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is highly unlikely. Kernel versions 4.18.x, 4.14.x and 3.10.x are believed to be vulnerable.
Timeline
ID reserved
By redhat
- 2 months later
· 2 months later
Published
- 6 years later
· 6 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.0 | High7.0 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H |
| NVDNVD · Modified | 3.1 | High7.0 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H |
- EPSS (exploitation in 30 days)
- 8.7% · top 4.8% of all CVEs (10 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.0.
Affected products
- affected 4.18.x, 4.14.x, 3.10.x
References
18
- USN-3776-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- USN-3776-2 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- USN-3777-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14633 (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-3775-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- https://seclists.org/oss-sec/2018/q3/270 (opens in a new tab)x_refsource_MISCx_transferred
- [debian-lts-announce] 20181003 [SECURITY] [DLA 1531-1] linux-4.9 security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- USN-3779-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 105388 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git/commit/?h=4.19/scsi-fixes&id=8c39e2699f8acb2e29782a834e56306da24937fe (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2018:3666 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git/commit/?h=4.19/scsi-fixes&id=1816494330a83f2a064499d8ed2797045641f92c (opens in a new tab)x_refsource_CONFIRMx_transferred
- DSA-4308 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- RHSA-2018:3651 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- USN-3775-2 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- USN-3777-2 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- USN-3777-3 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- RHSA-2019:1946 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2018-6536 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2018-14633)Record last updated .