SB2018080816 - Multiple vulnerabilities in gogs.io gogs

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Cross-site scripting (CVE-ID: CVE-2018-17031)

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

In Gogs 0.11.53, an attacker can use a crafted .eml file to trigger MIME type sniffing, which leads to XSS, as demonstrated by Internet Explorer, because an "X-Content-Type-Options: nosniff" header is not sent.

2) Server-Side Request Forgery (SSRF) (CVE-ID: CVE-2018-16409)

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

In Gogs 0.11.53, an attacker can use migrate to send arbitrary HTTP GET requests, leading to SSRF.

3) Cross-site request forgery (CVE-ID: CVE-2018-15193)

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient validation of the HTTP request origin. A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website.

Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

• https://github.com/gogs/gogs/issues/5397
• https://github.com/gogs/gogs/issues/5372
• https://github.com/gogs/gogs/issues/5367