CVE-2017-2624
It was found that xorg-x11-server before 1.19.0 including uses memcmp() to check the received MIT cookie against a series of valid…
- 5.9MediumCVSS base score
- 0.70%Exploitation in 30 daysEPSS · top 47% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
It was found that xorg-x11-server before 1.19.0 including uses memcmp() to check the received MIT cookie against a series of valid cookies. If the cookie is correct, it is allowed to attach to the Xorg session. Since most memcmp() implementations return after an invalid byte is seen, this causes a time difference between a valid and invalid byte, which could allow an efficient brute force attack.
Timeline
ID reserved
By redhat
- 20 months later
· 20 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 | Medium5.9 | CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N |
| NVDNVD · Modified | 3.0 | High7.0 | CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.70% · top 47% of all CVEs (10 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.
Affected products
- affected 1.19.0
References
8
- GLSA-201704-03 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- https://gitlab.freedesktop.org/xorg/xserver/commit/d7ac755f0b618eb1259d93c8a16ec6e39a18627c (opens in a new tab)x_refsource_CONFIRMx_transferred
- 1037919 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- [debian-lts-announce] 20171122 [SECURITY] [DLA 1186-1] xorg-server security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- GLSA-201710-30 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- 96480 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://www.x41-dsec.de/lab/advisories/x41-2017-001-xorg/ (opens in a new tab)x_refsource_MISCx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2624 (opens in a new tab)x_refsource_CONFIRMx_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-2017-11785 (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-2017-2624)Record last updated .