Stunnel: stack-based out-of-bounds read/write in stunnel s_vlog via oversized log message
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Mobi-Com Polska Sp. z o.o. | stunnel | unaffected |
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| Red Hat | Red Hat Enterprise Linux 10 | affected | — | ||||||
| Red Hat | Red Hat Enterprise Linux 6 | unaffected | — | ||||||
| Red Hat | Red Hat Enterprise Linux 7 | unaffected | — | ||||||
| Red Hat | Red Hat Enterprise Linux 8 | affected | — | ||||||
| Red Hat | Red Hat Enterprise Linux 9 | affected | — |
No data.
No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Stunnel | Stunnel |
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Vendor Workaround
To mitigate this issue, avoid exposing stunnel services to untrusted clients. Restrict access to these services to trusted networks only.
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.353% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Redhat rhel Els
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| CPEs | cpe:/o:redhat:enterprise_linux:6 cpe:/o:redhat:enterprise_linux:7 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9 |
cpe:/a:redhat:enterprise_linux:10 cpe:/a:redhat:enterprise_linux:8 cpe:/a:redhat:enterprise_linux:9 cpe:/o:redhat:rhel_els:6 cpe:/o:redhat:rhel_els:7 |
| Vendors & Products |
Redhat rhel Els
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| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Stunnel
Stunnel stunnel |
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| Vendors & Products |
Stunnel
Stunnel stunnel |
| Type | Values Removed | Values Added |
|---|---|---|
| Title | stunnel: Stack-based out-of-bounds read/write in stunnel s_vlog via oversized log message | Stunnel: stack-based out-of-bounds read/write in stunnel s_vlog via oversized log message |
| First Time appeared |
Redhat
Redhat enterprise Linux |
|
| CPEs | cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:6 cpe:/o:redhat:enterprise_linux:7 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9 |
|
| Vendors & Products |
Redhat
Redhat enterprise Linux |
|
| References |
|
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A stack-based out-of-bounds read vulnerability exists in the "s_vlog" function of stunnel, when handling oversized log messages via "vsnprintf". A remote attacker with network access to a stunnel service can send protocol inputs that trigger a log message longer than 1024 bytes, leading to an out-of-bounds stack read and a potential crash. In certain corner cases, the same vulnerability could be used to replace a series of trailing "\n" characters with "\0". | |
| Title | stunnel: Stack-based out-of-bounds read/write in stunnel s_vlog via oversized log message | |
| Weaknesses | CWE-125 | |
| References |
| |
| Metrics |
threat_severity
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cvssV3_1
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