CVE-2017-18365: github Deserialization of Untrusted Data
Vulnerability summary
CVE-2017-18365 is a critical (CVSS 9.8) Deserialization of Untrusted Data vulnerability in github. EPSS estimates a 21.24% chance of exploitation in the next 30 days, higher than 97.5% of scored vulnerabilities. 2 public exploits are recorded.
Timeline
- 28-03-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
The Management Console in GitHub Enterprise 2.8.x before 2.8.7 has a deserialization issue that allows unauthenticated remote attackers to execute arbitrary code. This occurs because the enterprise session secret is always the same, and can be found in the product's source code. By sending a crafted cookie signed with this secret, one can call Marshal.load with arbitrary data, which is a problem because the Marshal data format allows Ruby objects.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
21.24%
Chance of exploitation in the next 30 days
Percentile
98%
Versus all other CVEs
30-day change
0.00 pp
From 21.24% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
2 foundExploit Reference (exablue.de)
Maturity: unknown
Github Enterprise Default Session Secret And Deserialization Vulnerability
exploit/linux/http/github_enterprise_secret
Maturity: weaponized
Weaknesses
CWE · root causeAffected systems
Github1 product
- github≥ 2.8.0, < 2.8.7 | 2.8.7
1 vendor · 1 product
References
2 links- www.exablue.de/blog/2017-03-15-github-enterprise-remote-code-execution.htmlX Refsource MISCExploitThird Party Advisory