CVE-2019-18679: Infoleak
An issue was discovered in Squid 2.x, 3.x, and 4.x through 4.8. Due to incorrect data management, it is vulnerable to information disclosure when processing HTTP Digest Authentication. Nonce tokens contain the raw byte value of a pointer that sits within heap memory allocation. This information reduces ASLR protections and may aid attackers isolating memory areas to target for remote code execution attacks.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/squidto a version that resolves this vulnerability.Fixed in 4.13-10+deb11u3Fixed in 4.13-10+deb11u6Fixed in 5.7-2+deb12u5Fixed in 5.7-2+deb12u4Fixed in 6.13-2+deb13u1Fixed in 7.4-1
Event History
Frequently Asked Questions
What is the vulnerability ID of this issue?
The vulnerability ID is CVE-2019-18679.
What software versions are affected by this vulnerability?
Squid 2.x, 3.x, and 4.x through 4.8 are affected.
How severe is CVE-2019-18679?
CVE-2019-18679 has a severity rating of 7.5 (high).
How can I fix the vulnerability?
Upgrade to Squid 4.9-2ubuntu1 (or later), or apply the recommended patches.
Where can I find more information about CVE-2019-18679?
More information can be found at the following references: [Link 1](http://www.squid-cache.org/Advisories/SQUID-2019_11.txt), [Link 2](http://www.squid-cache.org/Versions/v4/changesets/squid-4-671ba97abe929156dc4c717ee52ad22fba0f7443.patch), [Link 3](https://bugzilla.suse.com/show_bug.cgi?id=1156324)