OpenSSL Information Disclosure
CVE-2014-0160 is a high-severity out-of-bounds read vulnerability in OpenSSL, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 1.0.1g as the first without the flaw, so updating OpenSSL to that release or later removes the exposure. CISA added it to the Known Exploited Vulnerabilities catalogue on May 4, 2022, which means attacks have been observed in the wild.
Attackers are already exploiting this vulnerability, according to CISA.
What to do
- Update OpenSSL to 1.0.1g or a later version.
- Update Filezilla Server to 0.9.44 or a later version.
- Update Elan-8.2 to 8.3.3 or a later version.
- CISA's required action: Apply updates per vendor instructions.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
Version data comes from NVD's product matching; 3 further products are omitted here. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- NoneNothing can be modified.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.5 | High | NVD |
| CVSS 3.1 | 7.5 | High | CISA (ADP) |
| CVSS 2.0 | 5.0 | Medium | NVD |
Official description
The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly handle Heartbeat Extension packets, which allows remote attackers to obtain sensitive information from process memory via crafted packets that trigger a buffer over-read, as demonstrated by reading private keys, related to d1_both.c and t1_lib.c, aka the Heartbleed bug.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.
How developers prevent this class of flaw
- Use a language that provides appropriate memory abstractions.
Timeline
- CVE record published.
- Added to CISA's Known Exploited Vulnerabilities catalogue.
- Deadline for US federal agencies to remediate, set by CISA.
- CISA published its SSVC assessment (exploitation: active, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- cogentdatahub.com/ReleaseNotes.htmlRelease Notes
Third-party and government advisories
- advisories.mageia.org/MGASA-2014-0165.htmlThird Party Advisory
- blog.fox-it.com/2014/04/08/openssl-heartbleed-bug-live-blog/Issue Tracking, Third Party Advisory
- heartbleed.com/Third Party Advisory
- lists.fedoraproject.org/pipermail/package-announce/2014-August/136473.htmlMailing List, Third Party Advisory
- lists.opensuse.org/opensuse-security-announce/2014-04/msg00004.htmlMailing List, Third Party Advisory
- lists.opensuse.org/opensuse-security-announce/2014-04/msg00005.htmlMailing List, Third Party Advisory
- lists.opensuse.org/opensuse-updates/2014-04/msg00061.htmlMailing List, Third Party Advisory
- marc.info/?l=bugtraq&m=139722163017074&w=2Mailing List, Third Party Advisory
- marc.info/?l=bugtraq&m=139757726426985&w=2Mailing List, Third Party Advisory
- marc.info/?l=bugtraq&m=139757819327350&w=2Mailing List, Third Party Advisory
- marc.info/?l=bugtraq&m=139757919027752&w=2Mailing List, Third Party Advisory
- marc.info/?l=bugtraq&m=139758572430452&w=2Mailing List, Third Party Advisory
- marc.info/?l=bugtraq&m=139765756720506&w=2Mailing List, Third Party Advisory
- marc.info/?l=bugtraq&m=139774054614965&w=2Mailing List, Third Party Advisory
- marc.info/?l=bugtraq&m=139774703817488&w=2Mailing List, Third Party Advisory
Other vulnerabilities in OpenSSL
- 7.5 High severity
- 7.5 High severity
- 8.2 High severity
- 7.5 High severity
- 7.5 High severity
- 9.1 Critical severity
Spotted an error? Tell us.