CVE-2015-1789
HighThe X509_cmp_time function in crypto/x509/x509_vfy.c in OpenSSL before 0.9.8zg, 1.0.0 before 1.0.0s, 1.0.1 before 1.0.1n, and 1.0.2 before 1.0.2b allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via a crafted length field in…
Published Jun 12, 2015 · Updated Aug 4, 2026 · Also known as DEBIAN-CVE-2015-1789, UBUNTU-CVE-2015-1789
Key Facts
Patch immediately- CVE-2015-1789 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting Openssl, Sparc-Opl Service Processor (Oracle), rootio-openssl and 22 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 76% probability of exploitation in the next 30 days.
- Fixed versions are available, including compat-openssl097g 0.9.7g-146.22.1, compat-openssl097g 0.9.7g-146.22.31.1, compat-openssl097g-32bit 0.9.7g-146.22.1.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
7.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (30-day exploit likelihood)
76%
Higher than 99.5% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2015-1789 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
The X509_cmp_time function in crypto/x509/x509_vfy.c in OpenSSL before 0.9.8zg, 1.0.0 before 1.0.0s, 1.0.1 before 1.0.1n, and 1.0.2 before 1.0.2b allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via a crafted length field in ASN1_TIME data, as demonstrated by an attack against a server that supports client authentication with a custom verification callback.
Affected Products
326 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| OpensslOpenssl | 1.0.0, 1.0.0a, 1.0.0b, 1.0.0-beta1, 1.0.0-beta2, 1.0.0-beta3, 1.0.0-beta4, 1.0.0-beta5 | 0.9.8zf |
| Sparc-Opl Service ProcessorOracle | See advisory | 1121 |
| rootio-opensslrootio | See advisory | 1.0.2b-1 |
| openssl-develamazon | See advisory | 1:1.0.1k-10.86.amzn1 |
| openssl-perlamazon | See advisory | 1:1.0.1k-10.86.amzn1 |
Patched Releases
compat-openssl097g
0.9.7g-146.22.1, 0.9.7g-146.22.31.1
compat-openssl097g-32bit
0.9.7g-146.22.1, 0.9.7g-146.22.31.1
compat-openssl098
0.9.8j-78.1
libcrypto34
2.2.1-2.3.1
libcrypto34-32bit
2.2.1-2.3.1
libcrypto34-debuginfo
2.2.1-2.3.1
libcrypto34-debuginfo-32bit
2.2.1-2.3.1
libcrypto38
2.5.0-1.1
libcrypto38-32bit
2.5.0-1.1
libmysql55client_r18
5.5.46-0.14.1
libmysql55client_r18-32bit
5.5.46-0.14.1
libmysql55client_r18-x86
5.5.46-0.14.1
libmysql55client18
5.5.46-0.14.1
libmysql55client18-32bit
5.5.46-0.14.1
libmysql55client18-x86
5.5.46-0.14.1
libmysql56client_r18
5.6.27-8.1, 5.6.34-1.1
libmysql56client_r18-32bit
5.6.27-8.1, 5.6.34-1.1
libmysql56client18
5.6.27-8.1, 5.6.34-1.1
libmysql56client18-32bit
5.6.27-8.1, 5.6.34-1.1
libopenssl-1_1-devel
1.1.1l-1.2
libopenssl-1_1-devel-32bit
1.1.1l-1.2
libopenssl-devel
0.9.8j-0.66.1, 1.0.1i-25.1, 1.0.2j-2.2
libopenssl-devel-32bit
1.0.2j-2.2
libopenssl0_9_8
0.9.8j-0.50.1, 0.9.8j-0.66.1, 0.9.8j-78.1, 0.9.8zh-14.1
libopenssl0_9_8-32bit
0.9.8j-0.50.1, 0.9.8j-0.66.1, 0.9.8j-78.1, 0.9.8zh-14.1
Timeline
Publicly disclosed
Jun 12, 2015
Last updated
Aug 4, 2026
Weakness Type
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
- CWE-125 Out-of-bounds Read
References
- advisoryRHSA-2015:1115
- advisoryRHSA-2015:1197
- advisoryhttps://bugzilla.suse.com/879179
- advisoryhttps://bugzilla.suse.com/926597
- advisoryhttps://bugzilla.suse.com/929678
FAQ
Common Questions.
The X509_cmp_time function in crypto/x509/x509_vfy.c in OpenSSL before 0.9.8zg, 1.0.0 before 1.0.0s, 1.0.1 before 1.0.1n, and 1.0.2 before 1.0.2b allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via a crafted length field in ASN1_TIME data, as demonstrated by an attack ag…
Affected: Openssl versions 1.0.0, 1.0.0a, 1.0.0b, 1.0.0-beta1, 1.0.0-beta2, 1.0.0-beta3, 1.0.0-beta4, 1.0.0-beta5; Sparc-Opl Service Processor (Oracle); rootio-openssl, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including compat-openssl097g 0.9.7g-146.22.1, compat-openssl097g 0.9.7g-146.22.31.1, compat-openssl097g-32bit 0.9.7g-146.22.1.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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